Initial import

1 files changed, 5053 insertions, 0 deletions

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
new file mode 100644
index 000000000..26053bf2f
--- /dev/null
+++ b/net/mac80211/mlme.c
@@ -0,0 +1,5053 @@
+/*
+ * BSS client mode implementation
+ * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
+ * Copyright 2004, Instant802 Networks, Inc.
+ * Copyright 2005, Devicescape Software, Inc.
+ * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
+ * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
+ * Copyright 2013-2014  Intel Mobile Communications GmbH
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/if_ether.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/etherdevice.h>
+#include <linux/moduleparam.h>
+#include <linux/rtnetlink.h>
+#include <linux/pm_qos.h>
+#include <linux/crc32.h>
+#include <linux/slab.h>
+#include <linux/export.h>
+#include <net/mac80211.h>
+#include <asm/unaligned.h>
+
+#include "ieee80211_i.h"
+#include "driver-ops.h"
+#include "rate.h"
+#include "led.h"
+
+#define IEEE80211_AUTH_TIMEOUT		(HZ / 5)
+#define IEEE80211_AUTH_TIMEOUT_LONG	(HZ / 2)
+#define IEEE80211_AUTH_TIMEOUT_SHORT	(HZ / 10)
+#define IEEE80211_AUTH_MAX_TRIES	3
+#define IEEE80211_AUTH_WAIT_ASSOC	(HZ * 5)
+#define IEEE80211_ASSOC_TIMEOUT		(HZ / 5)
+#define IEEE80211_ASSOC_TIMEOUT_LONG	(HZ / 2)
+#define IEEE80211_ASSOC_TIMEOUT_SHORT	(HZ / 10)
+#define IEEE80211_ASSOC_MAX_TRIES	3
+
+static int max_nullfunc_tries = 2;
+module_param(max_nullfunc_tries, int, 0644);
+MODULE_PARM_DESC(max_nullfunc_tries,
+		 "Maximum nullfunc tx tries before disconnecting (reason 4).");
+
+static int max_probe_tries = 5;
+module_param(max_probe_tries, int, 0644);
+MODULE_PARM_DESC(max_probe_tries,
+		 "Maximum probe tries before disconnecting (reason 4).");
+
+/*
+ * Beacon loss timeout is calculated as N frames times the
+ * advertised beacon interval.  This may need to be somewhat
+ * higher than what hardware might detect to account for
+ * delays in the host processing frames. But since we also
+ * probe on beacon miss before declaring the connection lost
+ * default to what we want.
+ */
+static int beacon_loss_count = 7;
+module_param(beacon_loss_count, int, 0644);
+MODULE_PARM_DESC(beacon_loss_count,
+		 "Number of beacon intervals before we decide beacon was lost.");
+
+/*
+ * Time the connection can be idle before we probe
+ * it to see if we can still talk to the AP.
+ */
+#define IEEE80211_CONNECTION_IDLE_TIME	(30 * HZ)
+/*
+ * Time we wait for a probe response after sending
+ * a probe request because of beacon loss or for
+ * checking the connection still works.
+ */
+static int probe_wait_ms = 500;
+module_param(probe_wait_ms, int, 0644);
+MODULE_PARM_DESC(probe_wait_ms,
+		 "Maximum time(ms) to wait for probe response"
+		 " before disconnecting (reason 4).");
+
+/*
+ * Weight given to the latest Beacon frame when calculating average signal
+ * strength for Beacon frames received in the current BSS. This must be
+ * between 1 and 15.
+ */
+#define IEEE80211_SIGNAL_AVE_WEIGHT	3
+
+/*
+ * How many Beacon frames need to have been used in average signal strength
+ * before starting to indicate signal change events.
+ */
+#define IEEE80211_SIGNAL_AVE_MIN_COUNT	4
+
+/*
+ * We can have multiple work items (and connection probing)
+ * scheduling this timer, but we need to take care to only
+ * reschedule it when it should fire _earlier_ than it was
+ * asked for before, or if it's not pending right now. This
+ * function ensures that. Note that it then is required to
+ * run this function for all timeouts after the first one
+ * has happened -- the work that runs from this timer will
+ * do that.
+ */
+static void run_again(struct ieee80211_sub_if_data *sdata,
+		      unsigned long timeout)
+{
+	sdata_assert_lock(sdata);
+
+	if (!timer_pending(&sdata->u.mgd.timer) ||
+	    time_before(timeout, sdata->u.mgd.timer.expires))
+		mod_timer(&sdata->u.mgd.timer, timeout);
+}
+
+void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
+{
+	if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
+		return;
+
+	if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
+		return;
+
+	mod_timer(&sdata->u.mgd.bcn_mon_timer,
+		  round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
+}
+
+void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	if (unlikely(!sdata->u.mgd.associated))
+		return;
+
+	ifmgd->probe_send_count = 0;
+
+	if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
+		return;
+
+	mod_timer(&sdata->u.mgd.conn_mon_timer,
+		  round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
+}
+
+static int ecw2cw(int ecw)
+{
+	return (1 << ecw) - 1;
+}
+
+static u32
+ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
+			     struct ieee80211_supported_band *sband,
+			     struct ieee80211_channel *channel,
+			     const struct ieee80211_ht_cap *ht_cap,
+			     const struct ieee80211_ht_operation *ht_oper,
+			     const struct ieee80211_vht_operation *vht_oper,
+			     struct cfg80211_chan_def *chandef, bool tracking)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct cfg80211_chan_def vht_chandef;
+	struct ieee80211_sta_ht_cap sta_ht_cap;
+	u32 ht_cfreq, ret;
+
+	memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
+	ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
+
+	chandef->chan = channel;
+	chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
+	chandef->center_freq1 = channel->center_freq;
+	chandef->center_freq2 = 0;
+
+	if (!ht_cap || !ht_oper || !sta_ht_cap.ht_supported) {
+		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
+		goto out;
+	}
+
+	chandef->width = NL80211_CHAN_WIDTH_20;
+
+	if (!(ht_cap->cap_info &
+	      cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40))) {
+		ret = IEEE80211_STA_DISABLE_40MHZ;
+		vht_chandef = *chandef;
+		goto out;
+	}
+
+	ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
+						  channel->band);
+	/* check that channel matches the right operating channel */
+	if (!tracking && channel->center_freq != ht_cfreq) {
+		/*
+		 * It's possible that some APs are confused here;
+		 * Netgear WNDR3700 sometimes reports 4 higher than
+		 * the actual channel in association responses, but
+		 * since we look at probe response/beacon data here
+		 * it should be OK.
+		 */
+		sdata_info(sdata,
+			   "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
+			   channel->center_freq, ht_cfreq,
+			   ht_oper->primary_chan, channel->band);
+		ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
+		goto out;
+	}
+
+	/* check 40 MHz support, if we have it */
+	if (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
+		switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
+		case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
+			chandef->width = NL80211_CHAN_WIDTH_40;
+			chandef->center_freq1 += 10;
+			break;
+		case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
+			chandef->width = NL80211_CHAN_WIDTH_40;
+			chandef->center_freq1 -= 10;
+			break;
+		}
+	} else {
+		/* 40 MHz (and 80 MHz) must be supported for VHT */
+		ret = IEEE80211_STA_DISABLE_VHT;
+		/* also mark 40 MHz disabled */
+		ret |= IEEE80211_STA_DISABLE_40MHZ;
+		goto out;
+	}
+
+	if (!vht_oper || !sband->vht_cap.vht_supported) {
+		ret = IEEE80211_STA_DISABLE_VHT;
+		goto out;
+	}
+
+	vht_chandef.chan = channel;
+	vht_chandef.center_freq1 =
+		ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
+					       channel->band);
+	vht_chandef.center_freq2 = 0;
+
+	switch (vht_oper->chan_width) {
+	case IEEE80211_VHT_CHANWIDTH_USE_HT:
+		vht_chandef.width = chandef->width;
+		vht_chandef.center_freq1 = chandef->center_freq1;
+		break;
+	case IEEE80211_VHT_CHANWIDTH_80MHZ:
+		vht_chandef.width = NL80211_CHAN_WIDTH_80;
+		break;
+	case IEEE80211_VHT_CHANWIDTH_160MHZ:
+		vht_chandef.width = NL80211_CHAN_WIDTH_160;
+		break;
+	case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
+		vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
+		vht_chandef.center_freq2 =
+			ieee80211_channel_to_frequency(
+				vht_oper->center_freq_seg2_idx,
+				channel->band);
+		break;
+	default:
+		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
+			sdata_info(sdata,
+				   "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
+				   vht_oper->chan_width);
+		ret = IEEE80211_STA_DISABLE_VHT;
+		goto out;
+	}
+
+	if (!cfg80211_chandef_valid(&vht_chandef)) {
+		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
+			sdata_info(sdata,
+				   "AP VHT information is invalid, disable VHT\n");
+		ret = IEEE80211_STA_DISABLE_VHT;
+		goto out;
+	}
+
+	if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
+		ret = 0;
+		goto out;
+	}
+
+	if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
+		if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
+			sdata_info(sdata,
+				   "AP VHT information doesn't match HT, disable VHT\n");
+		ret = IEEE80211_STA_DISABLE_VHT;
+		goto out;
+	}
+
+	*chandef = vht_chandef;
+
+	ret = 0;
+
+out:
+	/*
+	 * When tracking the current AP, don't do any further checks if the
+	 * new chandef is identical to the one we're currently using for the
+	 * connection. This keeps us from playing ping-pong with regulatory,
+	 * without it the following can happen (for example):
+	 *  - connect to an AP with 80 MHz, world regdom allows 80 MHz
+	 *  - AP advertises regdom US
+	 *  - CRDA loads regdom US with 80 MHz prohibited (old database)
+	 *  - the code below detects an unsupported channel, downgrades, and
+	 *    we disconnect from the AP in the caller
+	 *  - disconnect causes CRDA to reload world regdomain and the game
+	 *    starts anew.
+	 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881)
+	 *
+	 * It seems possible that there are still scenarios with CSA or real
+	 * bandwidth changes where a this could happen, but those cases are
+	 * less common and wouldn't completely prevent using the AP.
+	 */
+	if (tracking &&
+	    cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef))
+		return ret;
+
+	/* don't print the message below for VHT mismatch if VHT is disabled */
+	if (ret & IEEE80211_STA_DISABLE_VHT)
+		vht_chandef = *chandef;
+
+	/*
+	 * Ignore the DISABLED flag when we're already connected and only
+	 * tracking the APs beacon for bandwidth changes - otherwise we
+	 * might get disconnected here if we connect to an AP, update our
+	 * regulatory information based on the AP's country IE and the
+	 * information we have is wrong/outdated and disables the channel
+	 * that we're actually using for the connection to the AP.
+	 */
+	while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
+					tracking ? 0 :
+						   IEEE80211_CHAN_DISABLED)) {
+		if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
+			ret = IEEE80211_STA_DISABLE_HT |
+			      IEEE80211_STA_DISABLE_VHT;
+			break;
+		}
+
+		ret |= ieee80211_chandef_downgrade(chandef);
+	}
+
+	if (chandef->width != vht_chandef.width && !tracking)
+		sdata_info(sdata,
+			   "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
+
+	WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
+	return ret;
+}
+
+static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
+			       struct sta_info *sta,
+			       const struct ieee80211_ht_cap *ht_cap,
+			       const struct ieee80211_ht_operation *ht_oper,
+			       const struct ieee80211_vht_operation *vht_oper,
+			       const u8 *bssid, u32 *changed)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_channel *chan;
+	struct cfg80211_chan_def chandef;
+	u16 ht_opmode;
+	u32 flags;
+	enum ieee80211_sta_rx_bandwidth new_sta_bw;
+	int ret;
+
+	/* if HT was/is disabled, don't track any bandwidth changes */
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
+		return 0;
+
+	/* don't check VHT if we associated as non-VHT station */
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
+		vht_oper = NULL;
+
+	if (WARN_ON_ONCE(!sta))
+		return -EINVAL;
+
+	/*
+	 * if bss configuration changed store the new one -
+	 * this may be applicable even if channel is identical
+	 */
+	ht_opmode = le16_to_cpu(ht_oper->operation_mode);
+	if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
+		*changed |= BSS_CHANGED_HT;
+		sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
+	}
+
+	chan = sdata->vif.bss_conf.chandef.chan;
+	sband = local->hw.wiphy->bands[chan->band];
+
+	/* calculate new channel (type) based on HT/VHT operation IEs */
+	flags = ieee80211_determine_chantype(sdata, sband, chan,
+					     ht_cap, ht_oper, vht_oper,
+					     &chandef, true);
+
+	/*
+	 * Downgrade the new channel if we associated with restricted
+	 * capabilities. For example, if we associated as a 20 MHz STA
+	 * to a 40 MHz AP (due to regulatory, capabilities or config
+	 * reasons) then switching to a 40 MHz channel now won't do us
+	 * any good -- we couldn't use it with the AP.
+	 */
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
+	    chandef.width == NL80211_CHAN_WIDTH_80P80)
+		flags |= ieee80211_chandef_downgrade(&chandef);
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
+	    chandef.width == NL80211_CHAN_WIDTH_160)
+		flags |= ieee80211_chandef_downgrade(&chandef);
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
+	    chandef.width > NL80211_CHAN_WIDTH_20)
+		flags |= ieee80211_chandef_downgrade(&chandef);
+
+	if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
+		return 0;
+
+	sdata_info(sdata,
+		   "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
+		   ifmgd->bssid, chandef.chan->center_freq, chandef.width,
+		   chandef.center_freq1, chandef.center_freq2);
+
+	if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
+				      IEEE80211_STA_DISABLE_VHT |
+				      IEEE80211_STA_DISABLE_40MHZ |
+				      IEEE80211_STA_DISABLE_80P80MHZ |
+				      IEEE80211_STA_DISABLE_160MHZ)) ||
+	    !cfg80211_chandef_valid(&chandef)) {
+		sdata_info(sdata,
+			   "AP %pM changed bandwidth in a way we can't support - disconnect\n",
+			   ifmgd->bssid);
+		return -EINVAL;
+	}
+
+	switch (chandef.width) {
+	case NL80211_CHAN_WIDTH_20_NOHT:
+	case NL80211_CHAN_WIDTH_20:
+		new_sta_bw = IEEE80211_STA_RX_BW_20;
+		break;
+	case NL80211_CHAN_WIDTH_40:
+		new_sta_bw = IEEE80211_STA_RX_BW_40;
+		break;
+	case NL80211_CHAN_WIDTH_80:
+		new_sta_bw = IEEE80211_STA_RX_BW_80;
+		break;
+	case NL80211_CHAN_WIDTH_80P80:
+	case NL80211_CHAN_WIDTH_160:
+		new_sta_bw = IEEE80211_STA_RX_BW_160;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (new_sta_bw > sta->cur_max_bandwidth)
+		new_sta_bw = sta->cur_max_bandwidth;
+
+	if (new_sta_bw < sta->sta.bandwidth) {
+		sta->sta.bandwidth = new_sta_bw;
+		rate_control_rate_update(local, sband, sta,
+					 IEEE80211_RC_BW_CHANGED);
+	}
+
+	ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
+	if (ret) {
+		sdata_info(sdata,
+			   "AP %pM changed bandwidth to incompatible one - disconnect\n",
+			   ifmgd->bssid);
+		return ret;
+	}
+
+	if (new_sta_bw > sta->sta.bandwidth) {
+		sta->sta.bandwidth = new_sta_bw;
+		rate_control_rate_update(local, sband, sta,
+					 IEEE80211_RC_BW_CHANGED);
+	}
+
+	return 0;
+}
+
+/* frame sending functions */
+
+static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
+				struct sk_buff *skb, u8 ap_ht_param,
+				struct ieee80211_supported_band *sband,
+				struct ieee80211_channel *channel,
+				enum ieee80211_smps_mode smps)
+{
+	u8 *pos;
+	u32 flags = channel->flags;
+	u16 cap;
+	struct ieee80211_sta_ht_cap ht_cap;
+
+	BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
+
+	memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
+	ieee80211_apply_htcap_overrides(sdata, &ht_cap);
+
+	/* determine capability flags */
+	cap = ht_cap.cap;
+
+	switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
+	case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
+		if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
+			cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+			cap &= ~IEEE80211_HT_CAP_SGI_40;
+		}
+		break;
+	case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
+		if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
+			cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+			cap &= ~IEEE80211_HT_CAP_SGI_40;
+		}
+		break;
+	}
+
+	/*
+	 * If 40 MHz was disabled associate as though we weren't
+	 * capable of 40 MHz -- some broken APs will never fall
+	 * back to trying to transmit in 20 MHz.
+	 */
+	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
+		cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
+		cap &= ~IEEE80211_HT_CAP_SGI_40;
+	}
+
+	/* set SM PS mode properly */
+	cap &= ~IEEE80211_HT_CAP_SM_PS;
+	switch (smps) {
+	case IEEE80211_SMPS_AUTOMATIC:
+	case IEEE80211_SMPS_NUM_MODES:
+		WARN_ON(1);
+	case IEEE80211_SMPS_OFF:
+		cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
+			IEEE80211_HT_CAP_SM_PS_SHIFT;
+		break;
+	case IEEE80211_SMPS_STATIC:
+		cap |= WLAN_HT_CAP_SM_PS_STATIC <<
+			IEEE80211_HT_CAP_SM_PS_SHIFT;
+		break;
+	case IEEE80211_SMPS_DYNAMIC:
+		cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
+			IEEE80211_HT_CAP_SM_PS_SHIFT;
+		break;
+	}
+
+	/* reserve and fill IE */
+	pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
+	ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
+}
+
+static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
+				 struct sk_buff *skb,
+				 struct ieee80211_supported_band *sband,
+				 struct ieee80211_vht_cap *ap_vht_cap)
+{
+	u8 *pos;
+	u32 cap;
+	struct ieee80211_sta_vht_cap vht_cap;
+	u32 mask, ap_bf_sts, our_bf_sts;
+
+	BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
+
+	memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
+	ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
+
+	/* determine capability flags */
+	cap = vht_cap.cap;
+
+	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
+		u32 bw = cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
+
+		cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
+		if (bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
+		    bw == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
+			cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
+	}
+
+	if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
+		cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
+		cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
+	}
+
+	/*
+	 * Some APs apparently get confused if our capabilities are better
+	 * than theirs, so restrict what we advertise in the assoc request.
+	 */
+	if (!(ap_vht_cap->vht_cap_info &
+			cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
+		cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
+
+	mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK;
+
+	ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask;
+	our_bf_sts = cap & mask;
+
+	if (ap_bf_sts < our_bf_sts) {
+		cap &= ~mask;
+		cap |= ap_bf_sts;
+	}
+
+	/* reserve and fill IE */
+	pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
+	ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
+}
+
+static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
+	struct sk_buff *skb;
+	struct ieee80211_mgmt *mgmt;
+	u8 *pos, qos_info;
+	size_t offset = 0, noffset;
+	int i, count, rates_len, supp_rates_len, shift;
+	u16 capab;
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	struct ieee80211_channel *chan;
+	u32 rate_flags, rates = 0;
+
+	sdata_assert_lock(sdata);
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (WARN_ON(!chanctx_conf)) {
+		rcu_read_unlock();
+		return;
+	}
+	chan = chanctx_conf->def.chan;
+	rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
+	rcu_read_unlock();
+	sband = local->hw.wiphy->bands[chan->band];
+	shift = ieee80211_vif_get_shift(&sdata->vif);
+
+	if (assoc_data->supp_rates_len) {
+		/*
+		 * Get all rates supported by the device and the AP as
+		 * some APs don't like getting a superset of their rates
+		 * in the association request (e.g. D-Link DAP 1353 in
+		 * b-only mode)...
+		 */
+		rates_len = ieee80211_parse_bitrates(&chanctx_conf->def, sband,
+						     assoc_data->supp_rates,
+						     assoc_data->supp_rates_len,
+						     &rates);
+	} else {
+		/*
+		 * In case AP not provide any supported rates information
+		 * before association, we send information element(s) with
+		 * all rates that we support.
+		 */
+		rates_len = 0;
+		for (i = 0; i < sband->n_bitrates; i++) {
+			if ((rate_flags & sband->bitrates[i].flags)
+			    != rate_flags)
+				continue;
+			rates |= BIT(i);
+			rates_len++;
+		}
+	}
+
+	skb = alloc_skb(local->hw.extra_tx_headroom +
+			sizeof(*mgmt) + /* bit too much but doesn't matter */
+			2 + assoc_data->ssid_len + /* SSID */
+			4 + rates_len + /* (extended) rates */
+			4 + /* power capability */
+			2 + 2 * sband->n_channels + /* supported channels */
+			2 + sizeof(struct ieee80211_ht_cap) + /* HT */
+			2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
+			assoc_data->ie_len + /* extra IEs */
+			9, /* WMM */
+			GFP_KERNEL);
+	if (!skb)
+		return;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+
+	capab = WLAN_CAPABILITY_ESS;
+
+	if (sband->band == IEEE80211_BAND_2GHZ) {
+		if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
+			capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
+		if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
+			capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
+	}
+
+	if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
+		capab |= WLAN_CAPABILITY_PRIVACY;
+
+	if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
+	    (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
+		capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
+
+	if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM)
+		capab |= WLAN_CAPABILITY_RADIO_MEASURE;
+
+	mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
+	memset(mgmt, 0, 24);
+	memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
+	memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
+	memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
+
+	if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
+		skb_put(skb, 10);
+		mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+						  IEEE80211_STYPE_REASSOC_REQ);
+		mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
+		mgmt->u.reassoc_req.listen_interval =
+				cpu_to_le16(local->hw.conf.listen_interval);
+		memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
+		       ETH_ALEN);
+	} else {
+		skb_put(skb, 4);
+		mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
+						  IEEE80211_STYPE_ASSOC_REQ);
+		mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
+		mgmt->u.assoc_req.listen_interval =
+				cpu_to_le16(local->hw.conf.listen_interval);
+	}
+
+	/* SSID */
+	pos = skb_put(skb, 2 + assoc_data->ssid_len);
+	*pos++ = WLAN_EID_SSID;
+	*pos++ = assoc_data->ssid_len;
+	memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
+
+	/* add all rates which were marked to be used above */
+	supp_rates_len = rates_len;
+	if (supp_rates_len > 8)
+		supp_rates_len = 8;
+
+	pos = skb_put(skb, supp_rates_len + 2);
+	*pos++ = WLAN_EID_SUPP_RATES;
+	*pos++ = supp_rates_len;
+
+	count = 0;
+	for (i = 0; i < sband->n_bitrates; i++) {
+		if (BIT(i) & rates) {
+			int rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
+						5 * (1 << shift));
+			*pos++ = (u8) rate;
+			if (++count == 8)
+				break;
+		}
+	}
+
+	if (rates_len > count) {
+		pos = skb_put(skb, rates_len - count + 2);
+		*pos++ = WLAN_EID_EXT_SUPP_RATES;
+		*pos++ = rates_len - count;
+
+		for (i++; i < sband->n_bitrates; i++) {
+			if (BIT(i) & rates) {
+				int rate;
+				rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
+						    5 * (1 << shift));
+				*pos++ = (u8) rate;
+			}
+		}
+	}
+
+	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT ||
+	    capab & WLAN_CAPABILITY_RADIO_MEASURE) {
+		pos = skb_put(skb, 4);
+		*pos++ = WLAN_EID_PWR_CAPABILITY;
+		*pos++ = 2;
+		*pos++ = 0; /* min tx power */
+		 /* max tx power */
+		*pos++ = ieee80211_chandef_max_power(&chanctx_conf->def);
+	}
+
+	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
+		/* TODO: get this in reg domain format */
+		pos = skb_put(skb, 2 * sband->n_channels + 2);
+		*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
+		*pos++ = 2 * sband->n_channels;
+		for (i = 0; i < sband->n_channels; i++) {
+			*pos++ = ieee80211_frequency_to_channel(
+					sband->channels[i].center_freq);
+			*pos++ = 1; /* one channel in the subband*/
+		}
+	}
+
+	/* if present, add any custom IEs that go before HT */
+	if (assoc_data->ie_len) {
+		static const u8 before_ht[] = {
+			WLAN_EID_SSID,
+			WLAN_EID_SUPP_RATES,
+			WLAN_EID_EXT_SUPP_RATES,
+			WLAN_EID_PWR_CAPABILITY,
+			WLAN_EID_SUPPORTED_CHANNELS,
+			WLAN_EID_RSN,
+			WLAN_EID_QOS_CAPA,
+			WLAN_EID_RRM_ENABLED_CAPABILITIES,
+			WLAN_EID_MOBILITY_DOMAIN,
+			WLAN_EID_FAST_BSS_TRANSITION,	/* reassoc only */
+			WLAN_EID_RIC_DATA,		/* reassoc only */
+			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
+		};
+		static const u8 after_ric[] = {
+			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
+			WLAN_EID_HT_CAPABILITY,
+			WLAN_EID_BSS_COEX_2040,
+			WLAN_EID_EXT_CAPABILITY,
+			WLAN_EID_QOS_TRAFFIC_CAPA,
+			WLAN_EID_TIM_BCAST_REQ,
+			WLAN_EID_INTERWORKING,
+			/* 60GHz doesn't happen right now */
+			WLAN_EID_VHT_CAPABILITY,
+			WLAN_EID_OPMODE_NOTIF,
+		};
+
+		noffset = ieee80211_ie_split_ric(assoc_data->ie,
+						 assoc_data->ie_len,
+						 before_ht,
+						 ARRAY_SIZE(before_ht),
+						 after_ric,
+						 ARRAY_SIZE(after_ric),
+						 offset);
+		pos = skb_put(skb, noffset - offset);
+		memcpy(pos, assoc_data->ie + offset, noffset - offset);
+		offset = noffset;
+	}
+
+	if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
+			 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
+		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+
+	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
+		ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
+				    sband, chan, sdata->smps_mode);
+
+	/* if present, add any custom IEs that go before VHT */
+	if (assoc_data->ie_len) {
+		static const u8 before_vht[] = {
+			WLAN_EID_SSID,
+			WLAN_EID_SUPP_RATES,
+			WLAN_EID_EXT_SUPP_RATES,
+			WLAN_EID_PWR_CAPABILITY,
+			WLAN_EID_SUPPORTED_CHANNELS,
+			WLAN_EID_RSN,
+			WLAN_EID_QOS_CAPA,
+			WLAN_EID_RRM_ENABLED_CAPABILITIES,
+			WLAN_EID_MOBILITY_DOMAIN,
+			WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
+			WLAN_EID_HT_CAPABILITY,
+			WLAN_EID_BSS_COEX_2040,
+			WLAN_EID_EXT_CAPABILITY,
+			WLAN_EID_QOS_TRAFFIC_CAPA,
+			WLAN_EID_TIM_BCAST_REQ,
+			WLAN_EID_INTERWORKING,
+		};
+
+		/* RIC already taken above, so no need to handle here anymore */
+		noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
+					     before_vht, ARRAY_SIZE(before_vht),
+					     offset);
+		pos = skb_put(skb, noffset - offset);
+		memcpy(pos, assoc_data->ie + offset, noffset - offset);
+		offset = noffset;
+	}
+
+	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
+		ieee80211_add_vht_ie(sdata, skb, sband,
+				     &assoc_data->ap_vht_cap);
+
+	/* if present, add any custom non-vendor IEs that go after HT */
+	if (assoc_data->ie_len) {
+		noffset = ieee80211_ie_split_vendor(assoc_data->ie,
+						    assoc_data->ie_len,
+						    offset);
+		pos = skb_put(skb, noffset - offset);
+		memcpy(pos, assoc_data->ie + offset, noffset - offset);
+		offset = noffset;
+	}
+
+	if (assoc_data->wmm) {
+		if (assoc_data->uapsd) {
+			qos_info = ifmgd->uapsd_queues;
+			qos_info |= (ifmgd->uapsd_max_sp_len <<
+				     IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
+		} else {
+			qos_info = 0;
+		}
+
+		pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info);
+	}
+
+	/* add any remaining custom (i.e. vendor specific here) IEs */
+	if (assoc_data->ie_len) {
+		noffset = assoc_data->ie_len;
+		pos = skb_put(skb, noffset - offset);
+		memcpy(pos, assoc_data->ie + offset, noffset - offset);
+	}
+
+	drv_mgd_prepare_tx(local, sdata);
+
+	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+	if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
+		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
+						IEEE80211_TX_INTFL_MLME_CONN_TX;
+	ieee80211_tx_skb(sdata, skb);
+}
+
+void ieee80211_send_pspoll(struct ieee80211_local *local,
+			   struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_pspoll *pspoll;
+	struct sk_buff *skb;
+
+	skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
+	if (!skb)
+		return;
+
+	pspoll = (struct ieee80211_pspoll *) skb->data;
+	pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
+
+	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+	ieee80211_tx_skb(sdata, skb);
+}
+
+void ieee80211_send_nullfunc(struct ieee80211_local *local,
+			     struct ieee80211_sub_if_data *sdata,
+			     int powersave)
+{
+	struct sk_buff *skb;
+	struct ieee80211_hdr_3addr *nullfunc;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
+	if (!skb)
+		return;
+
+	nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
+	if (powersave)
+		nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
+
+	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
+					IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
+
+	if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
+		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
+
+	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
+		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
+
+	ieee80211_tx_skb(sdata, skb);
+}
+
+static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
+					  struct ieee80211_sub_if_data *sdata)
+{
+	struct sk_buff *skb;
+	struct ieee80211_hdr *nullfunc;
+	__le16 fc;
+
+	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
+		return;
+
+	skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
+	if (!skb)
+		return;
+
+	skb_reserve(skb, local->hw.extra_tx_headroom);
+
+	nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
+	memset(nullfunc, 0, 30);
+	fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
+			 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
+	nullfunc->frame_control = fc;
+	memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
+	memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
+	memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
+	memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
+
+	IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
+	ieee80211_tx_skb(sdata, skb);
+}
+
+/* spectrum management related things */
+static void ieee80211_chswitch_work(struct work_struct *work)
+{
+	struct ieee80211_sub_if_data *sdata =
+		container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	int ret;
+
+	if (!ieee80211_sdata_running(sdata))
+		return;
+
+	sdata_lock(sdata);
+	mutex_lock(&local->mtx);
+	mutex_lock(&local->chanctx_mtx);
+
+	if (!ifmgd->associated)
+		goto out;
+
+	if (!sdata->vif.csa_active)
+		goto out;
+
+	/*
+	 * using reservation isn't immediate as it may be deferred until later
+	 * with multi-vif. once reservation is complete it will re-schedule the
+	 * work with no reserved_chanctx so verify chandef to check if it
+	 * completed successfully
+	 */
+
+	if (sdata->reserved_chanctx) {
+		/*
+		 * with multi-vif csa driver may call ieee80211_csa_finish()
+		 * many times while waiting for other interfaces to use their
+		 * reservations
+		 */
+		if (sdata->reserved_ready)
+			goto out;
+
+		ret = ieee80211_vif_use_reserved_context(sdata);
+		if (ret) {
+			sdata_info(sdata,
+				   "failed to use reserved channel context, disconnecting (err=%d)\n",
+				   ret);
+			ieee80211_queue_work(&sdata->local->hw,
+					     &ifmgd->csa_connection_drop_work);
+			goto out;
+		}
+
+		goto out;
+	}
+
+	if (!cfg80211_chandef_identical(&sdata->vif.bss_conf.chandef,
+					&sdata->csa_chandef)) {
+		sdata_info(sdata,
+			   "failed to finalize channel switch, disconnecting\n");
+		ieee80211_queue_work(&sdata->local->hw,
+				     &ifmgd->csa_connection_drop_work);
+		goto out;
+	}
+
+	/* XXX: shouldn't really modify cfg80211-owned data! */
+	ifmgd->associated->channel = sdata->csa_chandef.chan;
+
+	ifmgd->csa_waiting_bcn = true;
+
+	ieee80211_sta_reset_beacon_monitor(sdata);
+	ieee80211_sta_reset_conn_monitor(sdata);
+
+out:
+	mutex_unlock(&local->chanctx_mtx);
+	mutex_unlock(&local->mtx);
+	sdata_unlock(sdata);
+}
+
+static void ieee80211_chswitch_post_beacon(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	int ret;
+
+	sdata_assert_lock(sdata);
+
+	WARN_ON(!sdata->vif.csa_active);
+
+	if (sdata->csa_block_tx) {
+		ieee80211_wake_vif_queues(local, sdata,
+					  IEEE80211_QUEUE_STOP_REASON_CSA);
+		sdata->csa_block_tx = false;
+	}
+
+	sdata->vif.csa_active = false;
+	ifmgd->csa_waiting_bcn = false;
+
+	ret = drv_post_channel_switch(sdata);
+	if (ret) {
+		sdata_info(sdata,
+			   "driver post channel switch failed, disconnecting\n");
+		ieee80211_queue_work(&local->hw,
+				     &ifmgd->csa_connection_drop_work);
+		return;
+	}
+
+	cfg80211_ch_switch_notify(sdata->dev, &sdata->reserved_chandef);
+}
+
+void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	trace_api_chswitch_done(sdata, success);
+	if (!success) {
+		sdata_info(sdata,
+			   "driver channel switch failed, disconnecting\n");
+		ieee80211_queue_work(&sdata->local->hw,
+				     &ifmgd->csa_connection_drop_work);
+	} else {
+		ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
+	}
+}
+EXPORT_SYMBOL(ieee80211_chswitch_done);
+
+static void ieee80211_chswitch_timer(unsigned long data)
+{
+	struct ieee80211_sub_if_data *sdata =
+		(struct ieee80211_sub_if_data *) data;
+
+	ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
+}
+
+static void
+ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
+				 u64 timestamp, u32 device_timestamp,
+				 struct ieee802_11_elems *elems,
+				 bool beacon)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct cfg80211_bss *cbss = ifmgd->associated;
+	struct ieee80211_chanctx_conf *conf;
+	struct ieee80211_chanctx *chanctx;
+	enum ieee80211_band current_band;
+	struct ieee80211_csa_ie csa_ie;
+	struct ieee80211_channel_switch ch_switch;
+	int res;
+
+	sdata_assert_lock(sdata);
+
+	if (!cbss)
+		return;
+
+	if (local->scanning)
+		return;
+
+	/* disregard subsequent announcements if we are already processing */
+	if (sdata->vif.csa_active)
+		return;
+
+	current_band = cbss->channel->band;
+	memset(&csa_ie, 0, sizeof(csa_ie));
+	res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band,
+					   ifmgd->flags,
+					   ifmgd->associated->bssid, &csa_ie);
+	if (res	< 0)
+		ieee80211_queue_work(&local->hw,
+				     &ifmgd->csa_connection_drop_work);
+	if (res)
+		return;
+
+	if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chandef,
+				     IEEE80211_CHAN_DISABLED)) {
+		sdata_info(sdata,
+			   "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
+			   ifmgd->associated->bssid,
+			   csa_ie.chandef.chan->center_freq,
+			   csa_ie.chandef.width, csa_ie.chandef.center_freq1,
+			   csa_ie.chandef.center_freq2);
+		ieee80211_queue_work(&local->hw,
+				     &ifmgd->csa_connection_drop_work);
+		return;
+	}
+
+	if (cfg80211_chandef_identical(&csa_ie.chandef,
+				       &sdata->vif.bss_conf.chandef)) {
+		if (ifmgd->csa_ignored_same_chan)
+			return;
+		sdata_info(sdata,
+			   "AP %pM tries to chanswitch to same channel, ignore\n",
+			   ifmgd->associated->bssid);
+		ifmgd->csa_ignored_same_chan = true;
+		return;
+	}
+
+	mutex_lock(&local->mtx);
+	mutex_lock(&local->chanctx_mtx);
+	conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
+					 lockdep_is_held(&local->chanctx_mtx));
+	if (!conf) {
+		sdata_info(sdata,
+			   "no channel context assigned to vif?, disconnecting\n");
+		goto drop_connection;
+	}
+
+	chanctx = container_of(conf, struct ieee80211_chanctx, conf);
+
+	if (local->use_chanctx &&
+	    !(local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)) {
+		sdata_info(sdata,
+			   "driver doesn't support chan-switch with channel contexts\n");
+		goto drop_connection;
+	}
+
+	ch_switch.timestamp = timestamp;
+	ch_switch.device_timestamp = device_timestamp;
+	ch_switch.block_tx = csa_ie.mode;
+	ch_switch.chandef = csa_ie.chandef;
+	ch_switch.count = csa_ie.count;
+
+	if (drv_pre_channel_switch(sdata, &ch_switch)) {
+		sdata_info(sdata,
+			   "preparing for channel switch failed, disconnecting\n");
+		goto drop_connection;
+	}
+
+	res = ieee80211_vif_reserve_chanctx(sdata, &csa_ie.chandef,
+					    chanctx->mode, false);
+	if (res) {
+		sdata_info(sdata,
+			   "failed to reserve channel context for channel switch, disconnecting (err=%d)\n",
+			   res);
+		goto drop_connection;
+	}
+	mutex_unlock(&local->chanctx_mtx);
+
+	sdata->vif.csa_active = true;
+	sdata->csa_chandef = csa_ie.chandef;
+	sdata->csa_block_tx = csa_ie.mode;
+	ifmgd->csa_ignored_same_chan = false;
+
+	if (sdata->csa_block_tx)
+		ieee80211_stop_vif_queues(local, sdata,
+					  IEEE80211_QUEUE_STOP_REASON_CSA);
+	mutex_unlock(&local->mtx);
+
+	cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chandef,
+					  csa_ie.count);
+
+	if (local->ops->channel_switch) {
+		/* use driver's channel switch callback */
+		drv_channel_switch(local, sdata, &ch_switch);
+		return;
+	}
+
+	/* channel switch handled in software */
+	if (csa_ie.count <= 1)
+		ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
+	else
+		mod_timer(&ifmgd->chswitch_timer,
+			  TU_TO_EXP_TIME((csa_ie.count - 1) *
+					 cbss->beacon_interval));
+	return;
+ drop_connection:
+	ieee80211_queue_work(&local->hw, &ifmgd->csa_connection_drop_work);
+	mutex_unlock(&local->chanctx_mtx);
+	mutex_unlock(&local->mtx);
+}
+
+static bool
+ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata,
+				 struct ieee80211_channel *channel,
+				 const u8 *country_ie, u8 country_ie_len,
+				 const u8 *pwr_constr_elem,
+				 int *chan_pwr, int *pwr_reduction)
+{
+	struct ieee80211_country_ie_triplet *triplet;
+	int chan = ieee80211_frequency_to_channel(channel->center_freq);
+	int i, chan_increment;
+	bool have_chan_pwr = false;
+
+	/* Invalid IE */
+	if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
+		return false;
+
+	triplet = (void *)(country_ie + 3);
+	country_ie_len -= 3;
+
+	switch (channel->band) {
+	default:
+		WARN_ON_ONCE(1);
+		/* fall through */
+	case IEEE80211_BAND_2GHZ:
+	case IEEE80211_BAND_60GHZ:
+		chan_increment = 1;
+		break;
+	case IEEE80211_BAND_5GHZ:
+		chan_increment = 4;
+		break;
+	}
+
+	/* find channel */
+	while (country_ie_len >= 3) {
+		u8 first_channel = triplet->chans.first_channel;
+
+		if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
+			goto next;
+
+		for (i = 0; i < triplet->chans.num_channels; i++) {
+			if (first_channel + i * chan_increment == chan) {
+				have_chan_pwr = true;
+				*chan_pwr = triplet->chans.max_power;
+				break;
+			}
+		}
+		if (have_chan_pwr)
+			break;
+
+ next:
+		triplet++;
+		country_ie_len -= 3;
+	}
+
+	if (have_chan_pwr && pwr_constr_elem)
+		*pwr_reduction = *pwr_constr_elem;
+	else
+		*pwr_reduction = 0;
+
+	return have_chan_pwr;
+}
+
+static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata,
+				      struct ieee80211_channel *channel,
+				      const u8 *cisco_dtpc_ie,
+				      int *pwr_level)
+{
+	/* From practical testing, the first data byte of the DTPC element
+	 * seems to contain the requested dBm level, and the CLI on Cisco
+	 * APs clearly state the range is -127 to 127 dBm, which indicates
+	 * a signed byte, although it seemingly never actually goes negative.
+	 * The other byte seems to always be zero.
+	 */
+	*pwr_level = (__s8)cisco_dtpc_ie[4];
+}
+
+static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
+				       struct ieee80211_channel *channel,
+				       struct ieee80211_mgmt *mgmt,
+				       const u8 *country_ie, u8 country_ie_len,
+				       const u8 *pwr_constr_ie,
+				       const u8 *cisco_dtpc_ie)
+{
+	bool has_80211h_pwr = false, has_cisco_pwr = false;
+	int chan_pwr = 0, pwr_reduction_80211h = 0;
+	int pwr_level_cisco, pwr_level_80211h;
+	int new_ap_level;
+	__le16 capab = mgmt->u.probe_resp.capab_info;
+
+	if (country_ie &&
+	    (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) ||
+	     capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) {
+		has_80211h_pwr = ieee80211_find_80211h_pwr_constr(
+			sdata, channel, country_ie, country_ie_len,
+			pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h);
+		pwr_level_80211h =
+			max_t(int, 0, chan_pwr - pwr_reduction_80211h);
+	}
+
+	if (cisco_dtpc_ie) {
+		ieee80211_find_cisco_dtpc(
+			sdata, channel, cisco_dtpc_ie, &pwr_level_cisco);
+		has_cisco_pwr = true;
+	}
+
+	if (!has_80211h_pwr && !has_cisco_pwr)
+		return 0;
+
+	/* If we have both 802.11h and Cisco DTPC, apply both limits
+	 * by picking the smallest of the two power levels advertised.
+	 */
+	if (has_80211h_pwr &&
+	    (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) {
+		sdata_dbg(sdata,
+			  "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
+			  pwr_level_80211h, chan_pwr, pwr_reduction_80211h,
+			  sdata->u.mgd.bssid);
+		new_ap_level = pwr_level_80211h;
+	} else {  /* has_cisco_pwr is always true here. */
+		sdata_dbg(sdata,
+			  "Limiting TX power to %d dBm as advertised by %pM\n",
+			  pwr_level_cisco, sdata->u.mgd.bssid);
+		new_ap_level = pwr_level_cisco;
+	}
+
+	if (sdata->ap_power_level == new_ap_level)
+		return 0;
+
+	sdata->ap_power_level = new_ap_level;
+	if (__ieee80211_recalc_txpower(sdata))
+		return BSS_CHANGED_TXPOWER;
+	return 0;
+}
+
+/* powersave */
+static void ieee80211_enable_ps(struct ieee80211_local *local,
+				struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_conf *conf = &local->hw.conf;
+
+	/*
+	 * If we are scanning right now then the parameters will
+	 * take effect when scan finishes.
+	 */
+	if (local->scanning)
+		return;
+
+	if (conf->dynamic_ps_timeout > 0 &&
+	    !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
+		mod_timer(&local->dynamic_ps_timer, jiffies +
+			  msecs_to_jiffies(conf->dynamic_ps_timeout));
+	} else {
+		if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
+			ieee80211_send_nullfunc(local, sdata, 1);
+
+		if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
+		    (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
+			return;
+
+		conf->flags |= IEEE80211_CONF_PS;
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
+	}
+}
+
+static void ieee80211_change_ps(struct ieee80211_local *local)
+{
+	struct ieee80211_conf *conf = &local->hw.conf;
+
+	if (local->ps_sdata) {
+		ieee80211_enable_ps(local, local->ps_sdata);
+	} else if (conf->flags & IEEE80211_CONF_PS) {
+		conf->flags &= ~IEEE80211_CONF_PS;
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
+		del_timer_sync(&local->dynamic_ps_timer);
+		cancel_work_sync(&local->dynamic_ps_enable_work);
+	}
+}
+
+static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *mgd = &sdata->u.mgd;
+	struct sta_info *sta = NULL;
+	bool authorized = false;
+
+	if (!mgd->powersave)
+		return false;
+
+	if (mgd->broken_ap)
+		return false;
+
+	if (!mgd->associated)
+		return false;
+
+	if (mgd->flags & IEEE80211_STA_CONNECTION_POLL)
+		return false;
+
+	if (!mgd->have_beacon)
+		return false;
+
+	rcu_read_lock();
+	sta = sta_info_get(sdata, mgd->bssid);
+	if (sta)
+		authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
+	rcu_read_unlock();
+
+	return authorized;
+}
+
+/* need to hold RTNL or interface lock */
+void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
+{
+	struct ieee80211_sub_if_data *sdata, *found = NULL;
+	int count = 0;
+	int timeout;
+
+	if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
+		local->ps_sdata = NULL;
+		return;
+	}
+
+	list_for_each_entry(sdata, &local->interfaces, list) {
+		if (!ieee80211_sdata_running(sdata))
+			continue;
+		if (sdata->vif.type == NL80211_IFTYPE_AP) {
+			/* If an AP vif is found, then disable PS
+			 * by setting the count to zero thereby setting
+			 * ps_sdata to NULL.
+			 */
+			count = 0;
+			break;
+		}
+		if (sdata->vif.type != NL80211_IFTYPE_STATION)
+			continue;
+		found = sdata;
+		count++;
+	}
+
+	if (count == 1 && ieee80211_powersave_allowed(found)) {
+		s32 beaconint_us;
+
+		if (latency < 0)
+			latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
+
+		beaconint_us = ieee80211_tu_to_usec(
+					found->vif.bss_conf.beacon_int);
+
+		timeout = local->dynamic_ps_forced_timeout;
+		if (timeout < 0) {
+			/*
+			 * Go to full PSM if the user configures a very low
+			 * latency requirement.
+			 * The 2000 second value is there for compatibility
+			 * until the PM_QOS_NETWORK_LATENCY is configured
+			 * with real values.
+			 */
+			if (latency > (1900 * USEC_PER_MSEC) &&
+			    latency != (2000 * USEC_PER_SEC))
+				timeout = 0;
+			else
+				timeout = 100;
+		}
+		local->hw.conf.dynamic_ps_timeout = timeout;
+
+		if (beaconint_us > latency) {
+			local->ps_sdata = NULL;
+		} else {
+			int maxslp = 1;
+			u8 dtimper = found->u.mgd.dtim_period;
+
+			/* If the TIM IE is invalid, pretend the value is 1 */
+			if (!dtimper)
+				dtimper = 1;
+			else if (dtimper > 1)
+				maxslp = min_t(int, dtimper,
+						    latency / beaconint_us);
+
+			local->hw.conf.max_sleep_period = maxslp;
+			local->hw.conf.ps_dtim_period = dtimper;
+			local->ps_sdata = found;
+		}
+	} else {
+		local->ps_sdata = NULL;
+	}
+
+	ieee80211_change_ps(local);
+}
+
+void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
+{
+	bool ps_allowed = ieee80211_powersave_allowed(sdata);
+
+	if (sdata->vif.bss_conf.ps != ps_allowed) {
+		sdata->vif.bss_conf.ps = ps_allowed;
+		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
+	}
+}
+
+void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
+{
+	struct ieee80211_local *local =
+		container_of(work, struct ieee80211_local,
+			     dynamic_ps_disable_work);
+
+	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
+		local->hw.conf.flags &= ~IEEE80211_CONF_PS;
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
+	}
+
+	ieee80211_wake_queues_by_reason(&local->hw,
+					IEEE80211_MAX_QUEUE_MAP,
+					IEEE80211_QUEUE_STOP_REASON_PS,
+					false);
+}
+
+void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
+{
+	struct ieee80211_local *local =
+		container_of(work, struct ieee80211_local,
+			     dynamic_ps_enable_work);
+	struct ieee80211_sub_if_data *sdata = local->ps_sdata;
+	struct ieee80211_if_managed *ifmgd;
+	unsigned long flags;
+	int q;
+
+	/* can only happen when PS was just disabled anyway */
+	if (!sdata)
+		return;
+
+	ifmgd = &sdata->u.mgd;
+
+	if (local->hw.conf.flags & IEEE80211_CONF_PS)
+		return;
+
+	if (local->hw.conf.dynamic_ps_timeout > 0) {
+		/* don't enter PS if TX frames are pending */
+		if (drv_tx_frames_pending(local)) {
+			mod_timer(&local->dynamic_ps_timer, jiffies +
+				  msecs_to_jiffies(
+				  local->hw.conf.dynamic_ps_timeout));
+			return;
+		}
+
+		/*
+		 * transmission can be stopped by others which leads to
+		 * dynamic_ps_timer expiry. Postpone the ps timer if it
+		 * is not the actual idle state.
+		 */
+		spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
+		for (q = 0; q < local->hw.queues; q++) {
+			if (local->queue_stop_reasons[q]) {
+				spin_unlock_irqrestore(&local->queue_stop_reason_lock,
+						       flags);
+				mod_timer(&local->dynamic_ps_timer, jiffies +
+					  msecs_to_jiffies(
+					  local->hw.conf.dynamic_ps_timeout));
+				return;
+			}
+		}
+		spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
+	}
+
+	if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
+	    !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
+		if (drv_tx_frames_pending(local)) {
+			mod_timer(&local->dynamic_ps_timer, jiffies +
+				  msecs_to_jiffies(
+				  local->hw.conf.dynamic_ps_timeout));
+		} else {
+			ieee80211_send_nullfunc(local, sdata, 1);
+			/* Flush to get the tx status of nullfunc frame */
+			ieee80211_flush_queues(local, sdata, false);
+		}
+	}
+
+	if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
+	      (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
+	    (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
+		ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
+		local->hw.conf.flags |= IEEE80211_CONF_PS;
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
+	}
+}
+
+void ieee80211_dynamic_ps_timer(unsigned long data)
+{
+	struct ieee80211_local *local = (void *) data;
+
+	ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
+}
+
+void ieee80211_dfs_cac_timer_work(struct work_struct *work)
+{
+	struct delayed_work *delayed_work =
+		container_of(work, struct delayed_work, work);
+	struct ieee80211_sub_if_data *sdata =
+		container_of(delayed_work, struct ieee80211_sub_if_data,
+			     dfs_cac_timer_work);
+	struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chandef;
+
+	mutex_lock(&sdata->local->mtx);
+	if (sdata->wdev.cac_started) {
+		ieee80211_vif_release_channel(sdata);
+		cfg80211_cac_event(sdata->dev, &chandef,
+				   NL80211_RADAR_CAC_FINISHED,
+				   GFP_KERNEL);
+	}
+	mutex_unlock(&sdata->local->mtx);
+}
+
+static bool
+__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	bool ret = false;
+	int ac;
+
+	if (local->hw.queues < IEEE80211_NUM_ACS)
+		return false;
+
+	for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
+		struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
+		int non_acm_ac;
+		unsigned long now = jiffies;
+
+		if (tx_tspec->action == TX_TSPEC_ACTION_NONE &&
+		    tx_tspec->admitted_time &&
+		    time_after(now, tx_tspec->time_slice_start + HZ)) {
+			tx_tspec->consumed_tx_time = 0;
+			tx_tspec->time_slice_start = now;
+
+			if (tx_tspec->downgraded)
+				tx_tspec->action =
+					TX_TSPEC_ACTION_STOP_DOWNGRADE;
+		}
+
+		switch (tx_tspec->action) {
+		case TX_TSPEC_ACTION_STOP_DOWNGRADE:
+			/* take the original parameters */
+			if (drv_conf_tx(local, sdata, ac, &sdata->tx_conf[ac]))
+				sdata_err(sdata,
+					  "failed to set TX queue parameters for queue %d\n",
+					  ac);
+			tx_tspec->action = TX_TSPEC_ACTION_NONE;
+			tx_tspec->downgraded = false;
+			ret = true;
+			break;
+		case TX_TSPEC_ACTION_DOWNGRADE:
+			if (time_after(now, tx_tspec->time_slice_start + HZ)) {
+				tx_tspec->action = TX_TSPEC_ACTION_NONE;
+				ret = true;
+				break;
+			}
+			/* downgrade next lower non-ACM AC */
+			for (non_acm_ac = ac + 1;
+			     non_acm_ac < IEEE80211_NUM_ACS;
+			     non_acm_ac++)
+				if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac)))
+					break;
+			/* The loop will result in using BK even if it requires
+			 * admission control, such configuration makes no sense
+			 * and we have to transmit somehow - the AC selection
+			 * does the same thing.
+			 */
+			if (drv_conf_tx(local, sdata, ac,
+					&sdata->tx_conf[non_acm_ac]))
+				sdata_err(sdata,
+					  "failed to set TX queue parameters for queue %d\n",
+					  ac);
+			tx_tspec->action = TX_TSPEC_ACTION_NONE;
+			ret = true;
+			schedule_delayed_work(&ifmgd->tx_tspec_wk,
+				tx_tspec->time_slice_start + HZ - now + 1);
+			break;
+		case TX_TSPEC_ACTION_NONE:
+			/* nothing now */
+			break;
+		}
+	}
+
+	return ret;
+}
+
+void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata)
+{
+	if (__ieee80211_sta_handle_tspec_ac_params(sdata))
+		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_QOS);
+}
+
+static void ieee80211_sta_handle_tspec_ac_params_wk(struct work_struct *work)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	sdata = container_of(work, struct ieee80211_sub_if_data,
+			     u.mgd.tx_tspec_wk.work);
+	ieee80211_sta_handle_tspec_ac_params(sdata);
+}
+
+/* MLME */
+static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
+				     struct ieee80211_sub_if_data *sdata,
+				     const u8 *wmm_param, size_t wmm_param_len)
+{
+	struct ieee80211_tx_queue_params params;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	size_t left;
+	int count;
+	const u8 *pos;
+	u8 uapsd_queues = 0;
+
+	if (!local->ops->conf_tx)
+		return false;
+
+	if (local->hw.queues < IEEE80211_NUM_ACS)
+		return false;
+
+	if (!wmm_param)
+		return false;
+
+	if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
+		return false;
+
+	if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
+		uapsd_queues = ifmgd->uapsd_queues;
+
+	count = wmm_param[6] & 0x0f;
+	if (count == ifmgd->wmm_last_param_set)
+		return false;
+	ifmgd->wmm_last_param_set = count;
+
+	pos = wmm_param + 8;
+	left = wmm_param_len - 8;
+
+	memset(&params, 0, sizeof(params));
+
+	sdata->wmm_acm = 0;
+	for (; left >= 4; left -= 4, pos += 4) {
+		int aci = (pos[0] >> 5) & 0x03;
+		int acm = (pos[0] >> 4) & 0x01;
+		bool uapsd = false;
+		int queue;
+
+		switch (aci) {
+		case 1: /* AC_BK */
+			queue = 3;
+			if (acm)
+				sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
+			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
+				uapsd = true;
+			break;
+		case 2: /* AC_VI */
+			queue = 1;
+			if (acm)
+				sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
+			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
+				uapsd = true;
+			break;
+		case 3: /* AC_VO */
+			queue = 0;
+			if (acm)
+				sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
+			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
+				uapsd = true;
+			break;
+		case 0: /* AC_BE */
+		default:
+			queue = 2;
+			if (acm)
+				sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
+			if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
+				uapsd = true;
+			break;
+		}
+
+		params.aifs = pos[0] & 0x0f;
+		params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
+		params.cw_min = ecw2cw(pos[1] & 0x0f);
+		params.txop = get_unaligned_le16(pos + 2);
+		params.acm = acm;
+		params.uapsd = uapsd;
+
+		mlme_dbg(sdata,
+			 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n",
+			 queue, aci, acm,
+			 params.aifs, params.cw_min, params.cw_max,
+			 params.txop, params.uapsd,
+			 ifmgd->tx_tspec[queue].downgraded);
+		sdata->tx_conf[queue] = params;
+		if (!ifmgd->tx_tspec[queue].downgraded &&
+		    drv_conf_tx(local, sdata, queue, &params))
+			sdata_err(sdata,
+				  "failed to set TX queue parameters for queue %d\n",
+				  queue);
+	}
+
+	/* enable WMM or activate new settings */
+	sdata->vif.bss_conf.qos = true;
+	return true;
+}
+
+static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
+{
+	lockdep_assert_held(&sdata->local->mtx);
+
+	sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL;
+	ieee80211_run_deferred_scan(sdata->local);
+}
+
+static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
+{
+	mutex_lock(&sdata->local->mtx);
+	__ieee80211_stop_poll(sdata);
+	mutex_unlock(&sdata->local->mtx);
+}
+
+static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
+					   u16 capab, bool erp_valid, u8 erp)
+{
+	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
+	u32 changed = 0;
+	bool use_protection;
+	bool use_short_preamble;
+	bool use_short_slot;
+
+	if (erp_valid) {
+		use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
+		use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
+	} else {
+		use_protection = false;
+		use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
+	}
+
+	use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
+	if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
+		use_short_slot = true;
+
+	if (use_protection != bss_conf->use_cts_prot) {
+		bss_conf->use_cts_prot = use_protection;
+		changed |= BSS_CHANGED_ERP_CTS_PROT;
+	}
+
+	if (use_short_preamble != bss_conf->use_short_preamble) {
+		bss_conf->use_short_preamble = use_short_preamble;
+		changed |= BSS_CHANGED_ERP_PREAMBLE;
+	}
+
+	if (use_short_slot != bss_conf->use_short_slot) {
+		bss_conf->use_short_slot = use_short_slot;
+		changed |= BSS_CHANGED_ERP_SLOT;
+	}
+
+	return changed;
+}
+
+static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
+				     struct cfg80211_bss *cbss,
+				     u32 bss_info_changed)
+{
+	struct ieee80211_bss *bss = (void *)cbss->priv;
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
+
+	bss_info_changed |= BSS_CHANGED_ASSOC;
+	bss_info_changed |= ieee80211_handle_bss_capability(sdata,
+		bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
+
+	sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
+		beacon_loss_count * bss_conf->beacon_int));
+
+	sdata->u.mgd.associated = cbss;
+	memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
+
+	sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
+
+	if (sdata->vif.p2p) {
+		const struct cfg80211_bss_ies *ies;
+
+		rcu_read_lock();
+		ies = rcu_dereference(cbss->ies);
+		if (ies) {
+			int ret;
+
+			ret = cfg80211_get_p2p_attr(
+					ies->data, ies->len,
+					IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
+					(u8 *) &bss_conf->p2p_noa_attr,
+					sizeof(bss_conf->p2p_noa_attr));
+			if (ret >= 2) {
+				sdata->u.mgd.p2p_noa_index =
+					bss_conf->p2p_noa_attr.index;
+				bss_info_changed |= BSS_CHANGED_P2P_PS;
+			}
+		}
+		rcu_read_unlock();
+	}
+
+	/* just to be sure */
+	ieee80211_stop_poll(sdata);
+
+	ieee80211_led_assoc(local, 1);
+
+	if (sdata->u.mgd.have_beacon) {
+		/*
+		 * If the AP is buggy we may get here with no DTIM period
+		 * known, so assume it's 1 which is the only safe assumption
+		 * in that case, although if the TIM IE is broken powersave
+		 * probably just won't work at all.
+		 */
+		bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
+		bss_conf->beacon_rate = bss->beacon_rate;
+		bss_info_changed |= BSS_CHANGED_BEACON_INFO;
+	} else {
+		bss_conf->beacon_rate = NULL;
+		bss_conf->dtim_period = 0;
+	}
+
+	bss_conf->assoc = 1;
+
+	/* Tell the driver to monitor connection quality (if supported) */
+	if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
+	    bss_conf->cqm_rssi_thold)
+		bss_info_changed |= BSS_CHANGED_CQM;
+
+	/* Enable ARP filtering */
+	if (bss_conf->arp_addr_cnt)
+		bss_info_changed |= BSS_CHANGED_ARP_FILTER;
+
+	ieee80211_bss_info_change_notify(sdata, bss_info_changed);
+
+	mutex_lock(&local->iflist_mtx);
+	ieee80211_recalc_ps(local, -1);
+	mutex_unlock(&local->iflist_mtx);
+
+	ieee80211_recalc_smps(sdata);
+	ieee80211_recalc_ps_vif(sdata);
+
+	netif_carrier_on(sdata->dev);
+}
+
+static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
+				   u16 stype, u16 reason, bool tx,
+				   u8 *frame_buf)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_local *local = sdata->local;
+	u32 changed = 0;
+
+	sdata_assert_lock(sdata);
+
+	if (WARN_ON_ONCE(tx && !frame_buf))
+		return;
+
+	if (WARN_ON(!ifmgd->associated))
+		return;
+
+	ieee80211_stop_poll(sdata);
+
+	ifmgd->associated = NULL;
+	netif_carrier_off(sdata->dev);
+
+	/*
+	 * if we want to get out of ps before disassoc (why?) we have
+	 * to do it before sending disassoc, as otherwise the null-packet
+	 * won't be valid.
+	 */
+	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
+		local->hw.conf.flags &= ~IEEE80211_CONF_PS;
+		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
+	}
+	local->ps_sdata = NULL;
+
+	/* disable per-vif ps */
+	ieee80211_recalc_ps_vif(sdata);
+
+	/* make sure ongoing transmission finishes */
+	synchronize_net();
+
+	/*
+	 * drop any frame before deauth/disassoc, this can be data or
+	 * management frame. Since we are disconnecting, we should not
+	 * insist sending these frames which can take time and delay
+	 * the disconnection and possible the roaming.
+	 */
+	if (tx)
+		ieee80211_flush_queues(local, sdata, true);
+
+	/* deauthenticate/disassociate now */
+	if (tx || frame_buf)
+		ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
+					       reason, tx, frame_buf);
+
+	/* flush out frame - make sure the deauth was actually sent */
+	if (tx)
+		ieee80211_flush_queues(local, sdata, false);
+
+	/* clear bssid only after building the needed mgmt frames */
+	eth_zero_addr(ifmgd->bssid);
+
+	/* remove AP and TDLS peers */
+	sta_info_flush(sdata);
+
+	/* finally reset all BSS / config parameters */
+	changed |= ieee80211_reset_erp_info(sdata);
+
+	ieee80211_led_assoc(local, 0);
+	changed |= BSS_CHANGED_ASSOC;
+	sdata->vif.bss_conf.assoc = false;
+
+	ifmgd->p2p_noa_index = -1;
+	memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
+	       sizeof(sdata->vif.bss_conf.p2p_noa_attr));
+
+	/* on the next assoc, re-program HT/VHT parameters */
+	memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
+	memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
+	memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
+	memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
+
+	sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
+
+	del_timer_sync(&local->dynamic_ps_timer);
+	cancel_work_sync(&local->dynamic_ps_enable_work);
+
+	/* Disable ARP filtering */
+	if (sdata->vif.bss_conf.arp_addr_cnt)
+		changed |= BSS_CHANGED_ARP_FILTER;
+
+	sdata->vif.bss_conf.qos = false;
+	changed |= BSS_CHANGED_QOS;
+
+	/* The BSSID (not really interesting) and HT changed */
+	changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
+	ieee80211_bss_info_change_notify(sdata, changed);
+
+	/* disassociated - set to defaults now */
+	ieee80211_set_wmm_default(sdata, false);
+
+	del_timer_sync(&sdata->u.mgd.conn_mon_timer);
+	del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
+	del_timer_sync(&sdata->u.mgd.timer);
+	del_timer_sync(&sdata->u.mgd.chswitch_timer);
+
+	sdata->vif.bss_conf.dtim_period = 0;
+	sdata->vif.bss_conf.beacon_rate = NULL;
+
+	ifmgd->have_beacon = false;
+
+	ifmgd->flags = 0;
+	mutex_lock(&local->mtx);
+	ieee80211_vif_release_channel(sdata);
+
+	sdata->vif.csa_active = false;
+	ifmgd->csa_waiting_bcn = false;
+	ifmgd->csa_ignored_same_chan = false;
+	if (sdata->csa_block_tx) {
+		ieee80211_wake_vif_queues(local, sdata,
+					  IEEE80211_QUEUE_STOP_REASON_CSA);
+		sdata->csa_block_tx = false;
+	}
+	mutex_unlock(&local->mtx);
+
+	/* existing TX TSPEC sessions no longer exist */
+	memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec));
+	cancel_delayed_work_sync(&ifmgd->tx_tspec_wk);
+
+	sdata->encrypt_headroom = IEEE80211_ENCRYPT_HEADROOM;
+}
+
+void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
+			     struct ieee80211_hdr *hdr)
+{
+	/*
+	 * We can postpone the mgd.timer whenever receiving unicast frames
+	 * from AP because we know that the connection is working both ways
+	 * at that time. But multicast frames (and hence also beacons) must
+	 * be ignored here, because we need to trigger the timer during
+	 * data idle periods for sending the periodic probe request to the
+	 * AP we're connected to.
+	 */
+	if (is_multicast_ether_addr(hdr->addr1))
+		return;
+
+	ieee80211_sta_reset_conn_monitor(sdata);
+}
+
+static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_local *local = sdata->local;
+
+	mutex_lock(&local->mtx);
+	if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL))
+		goto out;
+
+	__ieee80211_stop_poll(sdata);
+
+	mutex_lock(&local->iflist_mtx);
+	ieee80211_recalc_ps(local, -1);
+	mutex_unlock(&local->iflist_mtx);
+
+	if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
+		goto out;
+
+	/*
+	 * We've received a probe response, but are not sure whether
+	 * we have or will be receiving any beacons or data, so let's
+	 * schedule the timers again, just in case.
+	 */
+	ieee80211_sta_reset_beacon_monitor(sdata);
+
+	mod_timer(&ifmgd->conn_mon_timer,
+		  round_jiffies_up(jiffies +
+				   IEEE80211_CONNECTION_IDLE_TIME));
+out:
+	mutex_unlock(&local->mtx);
+}
+
+static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata,
+					   struct ieee80211_hdr *hdr,
+					   u16 tx_time)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	u16 tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
+	int ac = ieee80211_ac_from_tid(tid);
+	struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac];
+	unsigned long now = jiffies;
+
+	if (likely(!tx_tspec->admitted_time))
+		return;
+
+	if (time_after(now, tx_tspec->time_slice_start + HZ)) {
+		tx_tspec->consumed_tx_time = 0;
+		tx_tspec->time_slice_start = now;
+
+		if (tx_tspec->downgraded) {
+			tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE;
+			schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
+		}
+	}
+
+	if (tx_tspec->downgraded)
+		return;
+
+	tx_tspec->consumed_tx_time += tx_time;
+
+	if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) {
+		tx_tspec->downgraded = true;
+		tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE;
+		schedule_delayed_work(&ifmgd->tx_tspec_wk, 0);
+	}
+}
+
+void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
+			     struct ieee80211_hdr *hdr, bool ack, u16 tx_time)
+{
+	ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time);
+
+	if (!ieee80211_is_data(hdr->frame_control))
+	    return;
+
+	if (ieee80211_is_nullfunc(hdr->frame_control) &&
+	    sdata->u.mgd.probe_send_count > 0) {
+		if (ack)
+			ieee80211_sta_reset_conn_monitor(sdata);
+		else
+			sdata->u.mgd.nullfunc_failed = true;
+		ieee80211_queue_work(&sdata->local->hw, &sdata->work);
+		return;
+	}
+
+	if (ack)
+		ieee80211_sta_reset_conn_monitor(sdata);
+}
+
+static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	const u8 *ssid;
+	u8 *dst = ifmgd->associated->bssid;
+	u8 unicast_limit = max(1, max_probe_tries - 3);
+
+	/*
+	 * Try sending broadcast probe requests for the last three
+	 * probe requests after the first ones failed since some
+	 * buggy APs only support broadcast probe requests.
+	 */
+	if (ifmgd->probe_send_count >= unicast_limit)
+		dst = NULL;
+
+	/*
+	 * When the hardware reports an accurate Tx ACK status, it's
+	 * better to send a nullfunc frame instead of a probe request,
+	 * as it will kick us off the AP quickly if we aren't associated
+	 * anymore. The timeout will be reset if the frame is ACKed by
+	 * the AP.
+	 */
+	ifmgd->probe_send_count++;
+
+	if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
+		ifmgd->nullfunc_failed = false;
+		ieee80211_send_nullfunc(sdata->local, sdata, 0);
+	} else {
+		int ssid_len;
+
+		rcu_read_lock();
+		ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
+		if (WARN_ON_ONCE(ssid == NULL))
+			ssid_len = 0;
+		else
+			ssid_len = ssid[1];
+
+		ieee80211_send_probe_req(sdata, sdata->vif.addr, dst,
+					 ssid + 2, ssid_len, NULL,
+					 0, (u32) -1, true, 0,
+					 ifmgd->associated->channel, false);
+		rcu_read_unlock();
+	}
+
+	ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
+	run_again(sdata, ifmgd->probe_timeout);
+}
+
+static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
+				   bool beacon)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	bool already = false;
+
+	if (!ieee80211_sdata_running(sdata))
+		return;
+
+	sdata_lock(sdata);
+
+	if (!ifmgd->associated)
+		goto out;
+
+	mutex_lock(&sdata->local->mtx);
+
+	if (sdata->local->tmp_channel || sdata->local->scanning) {
+		mutex_unlock(&sdata->local->mtx);
+		goto out;
+	}
+
+	if (beacon) {
+		mlme_dbg_ratelimited(sdata,
+				     "detected beacon loss from AP (missed %d beacons) - probing\n",
+				     beacon_loss_count);
+
+		ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL);
+	}
+
+	/*
+	 * The driver/our work has already reported this event or the
+	 * connection monitoring has kicked in and we have already sent
+	 * a probe request. Or maybe the AP died and the driver keeps
+	 * reporting until we disassociate...
+	 *
+	 * In either case we have to ignore the current call to this
+	 * function (except for setting the correct probe reason bit)
+	 * because otherwise we would reset the timer every time and
+	 * never check whether we received a probe response!
+	 */
+	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)
+		already = true;
+
+	ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
+
+	mutex_unlock(&sdata->local->mtx);
+
+	if (already)
+		goto out;
+
+	mutex_lock(&sdata->local->iflist_mtx);
+	ieee80211_recalc_ps(sdata->local, -1);
+	mutex_unlock(&sdata->local->iflist_mtx);
+
+	ifmgd->probe_send_count = 0;
+	ieee80211_mgd_probe_ap_send(sdata);
+ out:
+	sdata_unlock(sdata);
+}
+
+struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
+					  struct ieee80211_vif *vif)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct cfg80211_bss *cbss;
+	struct sk_buff *skb;
+	const u8 *ssid;
+	int ssid_len;
+
+	if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
+		return NULL;
+
+	sdata_assert_lock(sdata);
+
+	if (ifmgd->associated)
+		cbss = ifmgd->associated;
+	else if (ifmgd->auth_data)
+		cbss = ifmgd->auth_data->bss;
+	else if (ifmgd->assoc_data)
+		cbss = ifmgd->assoc_data->bss;
+	else
+		return NULL;
+
+	rcu_read_lock();
+	ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
+	if (WARN_ON_ONCE(ssid == NULL))
+		ssid_len = 0;
+	else
+		ssid_len = ssid[1];
+
+	skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid,
+					(u32) -1, cbss->channel,
+					ssid + 2, ssid_len,
+					NULL, 0, true);
+	rcu_read_unlock();
+
+	return skb;
+}
+EXPORT_SYMBOL(ieee80211_ap_probereq_get);
+
+static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata,
+					const u8 *buf, size_t len, bool tx,
+					u16 reason)
+{
+	struct ieee80211_event event = {
+		.type = MLME_EVENT,
+		.u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT,
+		.u.mlme.reason = reason,
+	};
+
+	if (tx)
+		cfg80211_tx_mlme_mgmt(sdata->dev, buf, len);
+	else
+		cfg80211_rx_mlme_mgmt(sdata->dev, buf, len);
+
+	drv_event_callback(sdata->local, sdata, &event);
+}
+
+static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
+
+	sdata_lock(sdata);
+	if (!ifmgd->associated) {
+		sdata_unlock(sdata);
+		return;
+	}
+
+	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
+			       WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
+			       true, frame_buf);
+	mutex_lock(&local->mtx);
+	sdata->vif.csa_active = false;
+	ifmgd->csa_waiting_bcn = false;
+	if (sdata->csa_block_tx) {
+		ieee80211_wake_vif_queues(local, sdata,
+					  IEEE80211_QUEUE_STOP_REASON_CSA);
+		sdata->csa_block_tx = false;
+	}
+	mutex_unlock(&local->mtx);
+
+	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
+				    WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY);
+
+	sdata_unlock(sdata);
+}
+
+static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
+{
+	struct ieee80211_sub_if_data *sdata =
+		container_of(work, struct ieee80211_sub_if_data,
+			     u.mgd.beacon_connection_loss_work);
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct sta_info *sta;
+
+	if (ifmgd->associated) {
+		rcu_read_lock();
+		sta = sta_info_get(sdata, ifmgd->bssid);
+		if (sta)
+			sta->beacon_loss_count++;
+		rcu_read_unlock();
+	}
+
+	if (ifmgd->connection_loss) {
+		sdata_info(sdata, "Connection to AP %pM lost\n",
+			   ifmgd->bssid);
+		__ieee80211_disconnect(sdata);
+	} else {
+		ieee80211_mgd_probe_ap(sdata, true);
+	}
+}
+
+static void ieee80211_csa_connection_drop_work(struct work_struct *work)
+{
+	struct ieee80211_sub_if_data *sdata =
+		container_of(work, struct ieee80211_sub_if_data,
+			     u.mgd.csa_connection_drop_work);
+
+	__ieee80211_disconnect(sdata);
+}
+
+void ieee80211_beacon_loss(struct ieee80211_vif *vif)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_hw *hw = &sdata->local->hw;
+
+	trace_api_beacon_loss(sdata);
+
+	sdata->u.mgd.connection_loss = false;
+	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
+}
+EXPORT_SYMBOL(ieee80211_beacon_loss);
+
+void ieee80211_connection_loss(struct ieee80211_vif *vif)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+	struct ieee80211_hw *hw = &sdata->local->hw;
+
+	trace_api_connection_loss(sdata);
+
+	sdata->u.mgd.connection_loss = true;
+	ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
+}
+EXPORT_SYMBOL(ieee80211_connection_loss);
+
+
+static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
+					bool assoc)
+{
+	struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
+
+	sdata_assert_lock(sdata);
+
+	if (!assoc) {
+		/*
+		 * we are not authenticated yet, the only timer that could be
+		 * running is the timeout for the authentication response which
+		 * which is not relevant anymore.
+		 */
+		del_timer_sync(&sdata->u.mgd.timer);
+		sta_info_destroy_addr(sdata, auth_data->bss->bssid);
+
+		eth_zero_addr(sdata->u.mgd.bssid);
+		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
+		sdata->u.mgd.flags = 0;
+		mutex_lock(&sdata->local->mtx);
+		ieee80211_vif_release_channel(sdata);
+		mutex_unlock(&sdata->local->mtx);
+	}
+
+	cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
+	kfree(auth_data);
+	sdata->u.mgd.auth_data = NULL;
+}
+
+static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
+				     struct ieee80211_mgmt *mgmt, size_t len)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
+	u8 *pos;
+	struct ieee802_11_elems elems;
+	u32 tx_flags = 0;
+
+	pos = mgmt->u.auth.variable;
+	ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
+	if (!elems.challenge)
+		return;
+	auth_data->expected_transaction = 4;
+	drv_mgd_prepare_tx(sdata->local, sdata);
+	if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
+		tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
+			   IEEE80211_TX_INTFL_MLME_CONN_TX;
+	ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
+			    elems.challenge - 2, elems.challenge_len + 2,
+			    auth_data->bss->bssid, auth_data->bss->bssid,
+			    auth_data->key, auth_data->key_len,
+			    auth_data->key_idx, tx_flags);
+}
+
+static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
+				   struct ieee80211_mgmt *mgmt, size_t len)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	u8 bssid[ETH_ALEN];
+	u16 auth_alg, auth_transaction, status_code;
+	struct sta_info *sta;
+	struct ieee80211_event event = {
+		.type = MLME_EVENT,
+		.u.mlme.data = AUTH_EVENT,
+	};
+
+	sdata_assert_lock(sdata);
+
+	if (len < 24 + 6)
+		return;
+
+	if (!ifmgd->auth_data || ifmgd->auth_data->done)
+		return;
+
+	memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
+
+	if (!ether_addr_equal(bssid, mgmt->bssid))
+		return;
+
+	auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
+	auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
+	status_code = le16_to_cpu(mgmt->u.auth.status_code);
+
+	if (auth_alg != ifmgd->auth_data->algorithm ||
+	    auth_transaction != ifmgd->auth_data->expected_transaction) {
+		sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
+			   mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
+			   auth_transaction,
+			   ifmgd->auth_data->expected_transaction);
+		return;
+	}
+
+	if (status_code != WLAN_STATUS_SUCCESS) {
+		sdata_info(sdata, "%pM denied authentication (status %d)\n",
+			   mgmt->sa, status_code);
+		ieee80211_destroy_auth_data(sdata, false);
+		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
+		event.u.mlme.status = MLME_DENIED;
+		event.u.mlme.reason = status_code;
+		drv_event_callback(sdata->local, sdata, &event);
+		return;
+	}
+
+	switch (ifmgd->auth_data->algorithm) {
+	case WLAN_AUTH_OPEN:
+	case WLAN_AUTH_LEAP:
+	case WLAN_AUTH_FT:
+	case WLAN_AUTH_SAE:
+		break;
+	case WLAN_AUTH_SHARED_KEY:
+		if (ifmgd->auth_data->expected_transaction != 4) {
+			ieee80211_auth_challenge(sdata, mgmt, len);
+			/* need another frame */
+			return;
+		}
+		break;
+	default:
+		WARN_ONCE(1, "invalid auth alg %d",
+			  ifmgd->auth_data->algorithm);
+		return;
+	}
+
+	event.u.mlme.status = MLME_SUCCESS;
+	drv_event_callback(sdata->local, sdata, &event);
+	sdata_info(sdata, "authenticated\n");
+	ifmgd->auth_data->done = true;
+	ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
+	ifmgd->auth_data->timeout_started = true;
+	run_again(sdata, ifmgd->auth_data->timeout);
+
+	if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
+	    ifmgd->auth_data->expected_transaction != 2) {
+		/*
+		 * Report auth frame to user space for processing since another
+		 * round of Authentication frames is still needed.
+		 */
+		cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
+		return;
+	}
+
+	/* move station state to auth */
+	mutex_lock(&sdata->local->sta_mtx);
+	sta = sta_info_get(sdata, bssid);
+	if (!sta) {
+		WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
+		goto out_err;
+	}
+	if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
+		sdata_info(sdata, "failed moving %pM to auth\n", bssid);
+		goto out_err;
+	}
+	mutex_unlock(&sdata->local->sta_mtx);
+
+	cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len);
+	return;
+ out_err:
+	mutex_unlock(&sdata->local->sta_mtx);
+	/* ignore frame -- wait for timeout */
+}
+
+#define case_WLAN(type) \
+	case WLAN_REASON_##type: return #type
+
+static const char *ieee80211_get_reason_code_string(u16 reason_code)
+{
+	switch (reason_code) {
+	case_WLAN(UNSPECIFIED);
+	case_WLAN(PREV_AUTH_NOT_VALID);
+	case_WLAN(DEAUTH_LEAVING);
+	case_WLAN(DISASSOC_DUE_TO_INACTIVITY);
+	case_WLAN(DISASSOC_AP_BUSY);
+	case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA);
+	case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA);
+	case_WLAN(DISASSOC_STA_HAS_LEFT);
+	case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH);
+	case_WLAN(DISASSOC_BAD_POWER);
+	case_WLAN(DISASSOC_BAD_SUPP_CHAN);
+	case_WLAN(INVALID_IE);
+	case_WLAN(MIC_FAILURE);
+	case_WLAN(4WAY_HANDSHAKE_TIMEOUT);
+	case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT);
+	case_WLAN(IE_DIFFERENT);
+	case_WLAN(INVALID_GROUP_CIPHER);
+	case_WLAN(INVALID_PAIRWISE_CIPHER);
+	case_WLAN(INVALID_AKMP);
+	case_WLAN(UNSUPP_RSN_VERSION);
+	case_WLAN(INVALID_RSN_IE_CAP);
+	case_WLAN(IEEE8021X_FAILED);
+	case_WLAN(CIPHER_SUITE_REJECTED);
+	case_WLAN(DISASSOC_UNSPECIFIED_QOS);
+	case_WLAN(DISASSOC_QAP_NO_BANDWIDTH);
+	case_WLAN(DISASSOC_LOW_ACK);
+	case_WLAN(DISASSOC_QAP_EXCEED_TXOP);
+	case_WLAN(QSTA_LEAVE_QBSS);
+	case_WLAN(QSTA_NOT_USE);
+	case_WLAN(QSTA_REQUIRE_SETUP);
+	case_WLAN(QSTA_TIMEOUT);
+	case_WLAN(QSTA_CIPHER_NOT_SUPP);
+	case_WLAN(MESH_PEER_CANCELED);
+	case_WLAN(MESH_MAX_PEERS);
+	case_WLAN(MESH_CONFIG);
+	case_WLAN(MESH_CLOSE);
+	case_WLAN(MESH_MAX_RETRIES);
+	case_WLAN(MESH_CONFIRM_TIMEOUT);
+	case_WLAN(MESH_INVALID_GTK);
+	case_WLAN(MESH_INCONSISTENT_PARAM);
+	case_WLAN(MESH_INVALID_SECURITY);
+	case_WLAN(MESH_PATH_ERROR);
+	case_WLAN(MESH_PATH_NOFORWARD);
+	case_WLAN(MESH_PATH_DEST_UNREACHABLE);
+	case_WLAN(MAC_EXISTS_IN_MBSS);
+	case_WLAN(MESH_CHAN_REGULATORY);
+	case_WLAN(MESH_CHAN);
+	default: return "<unknown>";
+	}
+}
+
+static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
+				     struct ieee80211_mgmt *mgmt, size_t len)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	const u8 *bssid = NULL;
+	u16 reason_code;
+
+	sdata_assert_lock(sdata);
+
+	if (len < 24 + 2)
+		return;
+
+	if (!ifmgd->associated ||
+	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
+		return;
+
+	bssid = ifmgd->associated->bssid;
+
+	reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
+
+	sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n",
+		   bssid, reason_code, ieee80211_get_reason_code_string(reason_code));
+
+	ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
+
+	ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
+}
+
+
+static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
+				       struct ieee80211_mgmt *mgmt, size_t len)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	u16 reason_code;
+
+	sdata_assert_lock(sdata);
+
+	if (len < 24 + 2)
+		return;
+
+	if (!ifmgd->associated ||
+	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
+		return;
+
+	reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
+
+	sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
+		   mgmt->sa, reason_code);
+
+	ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
+
+	ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code);
+}
+
+static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
+				u8 *supp_rates, unsigned int supp_rates_len,
+				u32 *rates, u32 *basic_rates,
+				bool *have_higher_than_11mbit,
+				int *min_rate, int *min_rate_index,
+				int shift, u32 rate_flags)
+{
+	int i, j;
+
+	for (i = 0; i < supp_rates_len; i++) {
+		int rate = supp_rates[i] & 0x7f;
+		bool is_basic = !!(supp_rates[i] & 0x80);
+
+		if ((rate * 5 * (1 << shift)) > 110)
+			*have_higher_than_11mbit = true;
+
+		/*
+		 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
+		 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
+		 *
+		 * Note: Even through the membership selector and the basic
+		 *	 rate flag share the same bit, they are not exactly
+		 *	 the same.
+		 */
+		if (!!(supp_rates[i] & 0x80) &&
+		    (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
+			continue;
+
+		for (j = 0; j < sband->n_bitrates; j++) {
+			struct ieee80211_rate *br;
+			int brate;
+
+			br = &sband->bitrates[j];
+			if ((rate_flags & br->flags) != rate_flags)
+				continue;
+
+			brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
+			if (brate == rate) {
+				*rates |= BIT(j);
+				if (is_basic)
+					*basic_rates |= BIT(j);
+				if ((rate * 5) < *min_rate) {
+					*min_rate = rate * 5;
+					*min_rate_index = j;
+				}
+				break;
+			}
+		}
+	}
+}
+
+static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
+					 bool assoc)
+{
+	struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
+
+	sdata_assert_lock(sdata);
+
+	if (!assoc) {
+		/*
+		 * we are not associated yet, the only timer that could be
+		 * running is the timeout for the association response which
+		 * which is not relevant anymore.
+		 */
+		del_timer_sync(&sdata->u.mgd.timer);
+		sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
+
+		eth_zero_addr(sdata->u.mgd.bssid);
+		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
+		sdata->u.mgd.flags = 0;
+		mutex_lock(&sdata->local->mtx);
+		ieee80211_vif_release_channel(sdata);
+		mutex_unlock(&sdata->local->mtx);
+	}
+
+	kfree(assoc_data);
+	sdata->u.mgd.assoc_data = NULL;
+}
+
+static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
+				    struct cfg80211_bss *cbss,
+				    struct ieee80211_mgmt *mgmt, size_t len)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_supported_band *sband;
+	struct sta_info *sta;
+	u8 *pos;
+	u16 capab_info, aid;
+	struct ieee802_11_elems elems;
+	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
+	const struct cfg80211_bss_ies *bss_ies = NULL;
+	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
+	u32 changed = 0;
+	int err;
+	bool ret;
+
+	/* AssocResp and ReassocResp have identical structure */
+
+	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
+	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
+
+	if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
+		sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
+			   aid);
+	aid &= ~(BIT(15) | BIT(14));
+
+	ifmgd->broken_ap = false;
+
+	if (aid == 0 || aid > IEEE80211_MAX_AID) {
+		sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
+			   aid);
+		aid = 0;
+		ifmgd->broken_ap = true;
+	}
+
+	pos = mgmt->u.assoc_resp.variable;
+	ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
+
+	if (!elems.supp_rates) {
+		sdata_info(sdata, "no SuppRates element in AssocResp\n");
+		return false;
+	}
+
+	ifmgd->aid = aid;
+	ifmgd->tdls_chan_switch_prohibited =
+		elems.ext_capab && elems.ext_capab_len >= 5 &&
+		(elems.ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED);
+
+	/*
+	 * Some APs are erroneously not including some information in their
+	 * (re)association response frames. Try to recover by using the data
+	 * from the beacon or probe response. This seems to afflict mobile
+	 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T",
+	 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device.
+	 */
+	if ((assoc_data->wmm && !elems.wmm_param) ||
+	    (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
+	     (!elems.ht_cap_elem || !elems.ht_operation)) ||
+	    (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
+	     (!elems.vht_cap_elem || !elems.vht_operation))) {
+		const struct cfg80211_bss_ies *ies;
+		struct ieee802_11_elems bss_elems;
+
+		rcu_read_lock();
+		ies = rcu_dereference(cbss->ies);
+		if (ies)
+			bss_ies = kmemdup(ies, sizeof(*ies) + ies->len,
+					  GFP_ATOMIC);
+		rcu_read_unlock();
+		if (!bss_ies)
+			return false;
+
+		ieee802_11_parse_elems(bss_ies->data, bss_ies->len,
+				       false, &bss_elems);
+		if (assoc_data->wmm &&
+		    !elems.wmm_param && bss_elems.wmm_param) {
+			elems.wmm_param = bss_elems.wmm_param;
+			sdata_info(sdata,
+				   "AP bug: WMM param missing from AssocResp\n");
+		}
+
+		/*
+		 * Also check if we requested HT/VHT, otherwise the AP doesn't
+		 * have to include the IEs in the (re)association response.
+		 */
+		if (!elems.ht_cap_elem && bss_elems.ht_cap_elem &&
+		    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
+			elems.ht_cap_elem = bss_elems.ht_cap_elem;
+			sdata_info(sdata,
+				   "AP bug: HT capability missing from AssocResp\n");
+		}
+		if (!elems.ht_operation && bss_elems.ht_operation &&
+		    !(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
+			elems.ht_operation = bss_elems.ht_operation;
+			sdata_info(sdata,
+				   "AP bug: HT operation missing from AssocResp\n");
+		}
+		if (!elems.vht_cap_elem && bss_elems.vht_cap_elem &&
+		    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
+			elems.vht_cap_elem = bss_elems.vht_cap_elem;
+			sdata_info(sdata,
+				   "AP bug: VHT capa missing from AssocResp\n");
+		}
+		if (!elems.vht_operation && bss_elems.vht_operation &&
+		    !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)) {
+			elems.vht_operation = bss_elems.vht_operation;
+			sdata_info(sdata,
+				   "AP bug: VHT operation missing from AssocResp\n");
+		}
+	}
+
+	/*
+	 * We previously checked these in the beacon/probe response, so
+	 * they should be present here. This is just a safety net.
+	 */
+	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
+	    (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
+		sdata_info(sdata,
+			   "HT AP is missing WMM params or HT capability/operation\n");
+		ret = false;
+		goto out;
+	}
+
+	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
+	    (!elems.vht_cap_elem || !elems.vht_operation)) {
+		sdata_info(sdata,
+			   "VHT AP is missing VHT capability/operation\n");
+		ret = false;
+		goto out;
+	}
+
+	mutex_lock(&sdata->local->sta_mtx);
+	/*
+	 * station info was already allocated and inserted before
+	 * the association and should be available to us
+	 */
+	sta = sta_info_get(sdata, cbss->bssid);
+	if (WARN_ON(!sta)) {
+		mutex_unlock(&sdata->local->sta_mtx);
+		ret = false;
+		goto out;
+	}
+
+	sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
+
+	/* Set up internal HT/VHT capabilities */
+	if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
+		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
+						  elems.ht_cap_elem, sta);
+
+	if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
+		ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
+						    elems.vht_cap_elem, sta);
+
+	/*
+	 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
+	 * in their association response, so ignore that data for our own
+	 * configuration. If it changed since the last beacon, we'll get the
+	 * next beacon and update then.
+	 */
+
+	/*
+	 * If an operating mode notification IE is present, override the
+	 * NSS calculation (that would be done in rate_control_rate_init())
+	 * and use the # of streams from that element.
+	 */
+	if (elems.opmode_notif &&
+	    !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
+		u8 nss;
+
+		nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
+		nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
+		nss += 1;
+		sta->sta.rx_nss = nss;
+	}
+
+	rate_control_rate_init(sta);
+
+	if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) {
+		set_sta_flag(sta, WLAN_STA_MFP);
+		sta->sta.mfp = true;
+	} else {
+		sta->sta.mfp = false;
+	}
+
+	sta->sta.wme = elems.wmm_param && local->hw.queues >= IEEE80211_NUM_ACS;
+
+	err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
+	if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
+		err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
+	if (err) {
+		sdata_info(sdata,
+			   "failed to move station %pM to desired state\n",
+			   sta->sta.addr);
+		WARN_ON(__sta_info_destroy(sta));
+		mutex_unlock(&sdata->local->sta_mtx);
+		ret = false;
+		goto out;
+	}
+
+	mutex_unlock(&sdata->local->sta_mtx);
+
+	/*
+	 * Always handle WMM once after association regardless
+	 * of the first value the AP uses. Setting -1 here has
+	 * that effect because the AP values is an unsigned
+	 * 4-bit value.
+	 */
+	ifmgd->wmm_last_param_set = -1;
+
+	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) && elems.wmm_param)
+		ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
+					 elems.wmm_param_len);
+	else
+		ieee80211_set_wmm_default(sdata, false);
+	changed |= BSS_CHANGED_QOS;
+
+	/* set AID and assoc capability,
+	 * ieee80211_set_associated() will tell the driver */
+	bss_conf->aid = aid;
+	bss_conf->assoc_capability = capab_info;
+	ieee80211_set_associated(sdata, cbss, changed);
+
+	/*
+	 * If we're using 4-addr mode, let the AP know that we're
+	 * doing so, so that it can create the STA VLAN on its side
+	 */
+	if (ifmgd->use_4addr)
+		ieee80211_send_4addr_nullfunc(local, sdata);
+
+	/*
+	 * Start timer to probe the connection to the AP now.
+	 * Also start the timer that will detect beacon loss.
+	 */
+	ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
+	ieee80211_sta_reset_beacon_monitor(sdata);
+
+	ret = true;
+ out:
+	kfree(bss_ies);
+	return ret;
+}
+
+static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
+					 struct ieee80211_mgmt *mgmt,
+					 size_t len)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
+	u16 capab_info, status_code, aid;
+	struct ieee802_11_elems elems;
+	int ac, uapsd_queues = -1;
+	u8 *pos;
+	bool reassoc;
+	struct cfg80211_bss *bss;
+	struct ieee80211_event event = {
+		.type = MLME_EVENT,
+		.u.mlme.data = ASSOC_EVENT,
+	};
+
+	sdata_assert_lock(sdata);
+
+	if (!assoc_data)
+		return;
+	if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
+		return;
+
+	/*
+	 * AssocResp and ReassocResp have identical structure, so process both
+	 * of them in this function.
+	 */
+
+	if (len < 24 + 6)
+		return;
+
+	reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
+	capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
+	status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
+	aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
+
+	sdata_info(sdata,
+		   "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
+		   reassoc ? "Rea" : "A", mgmt->sa,
+		   capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
+
+	pos = mgmt->u.assoc_resp.variable;
+	ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
+
+	if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
+	    elems.timeout_int &&
+	    elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
+		u32 tu, ms;
+		tu = le32_to_cpu(elems.timeout_int->value);
+		ms = tu * 1024 / 1000;
+		sdata_info(sdata,
+			   "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
+			   mgmt->sa, tu, ms);
+		assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
+		assoc_data->timeout_started = true;
+		if (ms > IEEE80211_ASSOC_TIMEOUT)
+			run_again(sdata, assoc_data->timeout);
+		return;
+	}
+
+	bss = assoc_data->bss;
+
+	if (status_code != WLAN_STATUS_SUCCESS) {
+		sdata_info(sdata, "%pM denied association (code=%d)\n",
+			   mgmt->sa, status_code);
+		ieee80211_destroy_assoc_data(sdata, false);
+		event.u.mlme.status = MLME_DENIED;
+		event.u.mlme.reason = status_code;
+		drv_event_callback(sdata->local, sdata, &event);
+	} else {
+		if (!ieee80211_assoc_success(sdata, bss, mgmt, len)) {
+			/* oops -- internal error -- send timeout for now */
+			ieee80211_destroy_assoc_data(sdata, false);
+			cfg80211_assoc_timeout(sdata->dev, bss);
+			return;
+		}
+		event.u.mlme.status = MLME_SUCCESS;
+		drv_event_callback(sdata->local, sdata, &event);
+		sdata_info(sdata, "associated\n");
+
+		/*
+		 * destroy assoc_data afterwards, as otherwise an idle
+		 * recalc after assoc_data is NULL but before associated
+		 * is set can cause the interface to go idle
+		 */
+		ieee80211_destroy_assoc_data(sdata, true);
+
+		/* get uapsd queues configuration */
+		uapsd_queues = 0;
+		for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
+			if (sdata->tx_conf[ac].uapsd)
+				uapsd_queues |= BIT(ac);
+	}
+
+	cfg80211_rx_assoc_resp(sdata->dev, bss, (u8 *)mgmt, len, uapsd_queues);
+}
+
+static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
+				  struct ieee80211_mgmt *mgmt, size_t len,
+				  struct ieee80211_rx_status *rx_status,
+				  struct ieee802_11_elems *elems)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_bss *bss;
+	struct ieee80211_channel *channel;
+
+	sdata_assert_lock(sdata);
+
+	channel = ieee80211_get_channel(local->hw.wiphy, rx_status->freq);
+	if (!channel)
+		return;
+
+	bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
+					channel);
+	if (bss) {
+		sdata->vif.bss_conf.beacon_rate = bss->beacon_rate;
+		ieee80211_rx_bss_put(local, bss);
+	}
+}
+
+
+static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
+					 struct sk_buff *skb)
+{
+	struct ieee80211_mgmt *mgmt = (void *)skb->data;
+	struct ieee80211_if_managed *ifmgd;
+	struct ieee80211_rx_status *rx_status = (void *) skb->cb;
+	size_t baselen, len = skb->len;
+	struct ieee802_11_elems elems;
+
+	ifmgd = &sdata->u.mgd;
+
+	sdata_assert_lock(sdata);
+
+	if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
+		return; /* ignore ProbeResp to foreign address */
+
+	baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
+	if (baselen > len)
+		return;
+
+	ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
+			       false, &elems);
+
+	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
+
+	if (ifmgd->associated &&
+	    ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
+		ieee80211_reset_ap_probe(sdata);
+
+	if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
+	    ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
+		/* got probe response, continue with auth */
+		sdata_info(sdata, "direct probe responded\n");
+		ifmgd->auth_data->tries = 0;
+		ifmgd->auth_data->timeout = jiffies;
+		ifmgd->auth_data->timeout_started = true;
+		run_again(sdata, ifmgd->auth_data->timeout);
+	}
+}
+
+/*
+ * This is the canonical list of information elements we care about,
+ * the filter code also gives us all changes to the Microsoft OUI
+ * (00:50:F2) vendor IE which is used for WMM which we need to track,
+ * as well as the DTPC IE (part of the Cisco OUI) used for signaling
+ * changes to requested client power.
+ *
+ * We implement beacon filtering in software since that means we can
+ * avoid processing the frame here and in cfg80211, and userspace
+ * will not be able to tell whether the hardware supports it or not.
+ *
+ * XXX: This list needs to be dynamic -- userspace needs to be able to
+ *	add items it requires. It also needs to be able to tell us to
+ *	look out for other vendor IEs.
+ */
+static const u64 care_about_ies =
+	(1ULL << WLAN_EID_COUNTRY) |
+	(1ULL << WLAN_EID_ERP_INFO) |
+	(1ULL << WLAN_EID_CHANNEL_SWITCH) |
+	(1ULL << WLAN_EID_PWR_CONSTRAINT) |
+	(1ULL << WLAN_EID_HT_CAPABILITY) |
+	(1ULL << WLAN_EID_HT_OPERATION) |
+	(1ULL << WLAN_EID_EXT_CHANSWITCH_ANN);
+
+static void ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
+				     struct ieee80211_mgmt *mgmt, size_t len,
+				     struct ieee80211_rx_status *rx_status)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
+	size_t baselen;
+	struct ieee802_11_elems elems;
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_chanctx_conf *chanctx_conf;
+	struct ieee80211_channel *chan;
+	struct sta_info *sta;
+	u32 changed = 0;
+	bool erp_valid;
+	u8 erp_value = 0;
+	u32 ncrc;
+	u8 *bssid;
+	u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
+
+	sdata_assert_lock(sdata);
+
+	/* Process beacon from the current BSS */
+	baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
+	if (baselen > len)
+		return;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (!chanctx_conf) {
+		rcu_read_unlock();
+		return;
+	}
+
+	if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
+		rcu_read_unlock();
+		return;
+	}
+	chan = chanctx_conf->def.chan;
+	rcu_read_unlock();
+
+	if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
+	    ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
+		ieee802_11_parse_elems(mgmt->u.beacon.variable,
+				       len - baselen, false, &elems);
+
+		ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
+		if (elems.tim && !elems.parse_error) {
+			const struct ieee80211_tim_ie *tim_ie = elems.tim;
+			ifmgd->dtim_period = tim_ie->dtim_period;
+		}
+		ifmgd->have_beacon = true;
+		ifmgd->assoc_data->need_beacon = false;
+		if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
+			sdata->vif.bss_conf.sync_tsf =
+				le64_to_cpu(mgmt->u.beacon.timestamp);
+			sdata->vif.bss_conf.sync_device_ts =
+				rx_status->device_timestamp;
+			if (elems.tim)
+				sdata->vif.bss_conf.sync_dtim_count =
+					elems.tim->dtim_count;
+			else
+				sdata->vif.bss_conf.sync_dtim_count = 0;
+		}
+		/* continue assoc process */
+		ifmgd->assoc_data->timeout = jiffies;
+		ifmgd->assoc_data->timeout_started = true;
+		run_again(sdata, ifmgd->assoc_data->timeout);
+		return;
+	}
+
+	if (!ifmgd->associated ||
+	    !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
+		return;
+	bssid = ifmgd->associated->bssid;
+
+	/* Track average RSSI from the Beacon frames of the current AP */
+	ifmgd->last_beacon_signal = rx_status->signal;
+	if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
+		ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
+		ifmgd->ave_beacon_signal = rx_status->signal * 16;
+		ifmgd->last_cqm_event_signal = 0;
+		ifmgd->count_beacon_signal = 1;
+		ifmgd->last_ave_beacon_signal = 0;
+	} else {
+		ifmgd->ave_beacon_signal =
+			(IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
+			 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
+			 ifmgd->ave_beacon_signal) / 16;
+		ifmgd->count_beacon_signal++;
+	}
+
+	if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
+	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
+		int sig = ifmgd->ave_beacon_signal;
+		int last_sig = ifmgd->last_ave_beacon_signal;
+		struct ieee80211_event event = {
+			.type = RSSI_EVENT,
+		};
+
+		/*
+		 * if signal crosses either of the boundaries, invoke callback
+		 * with appropriate parameters
+		 */
+		if (sig > ifmgd->rssi_max_thold &&
+		    (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
+			ifmgd->last_ave_beacon_signal = sig;
+			event.u.rssi.data = RSSI_EVENT_HIGH;
+			drv_event_callback(local, sdata, &event);
+		} else if (sig < ifmgd->rssi_min_thold &&
+			   (last_sig >= ifmgd->rssi_max_thold ||
+			   last_sig == 0)) {
+			ifmgd->last_ave_beacon_signal = sig;
+			event.u.rssi.data = RSSI_EVENT_LOW;
+			drv_event_callback(local, sdata, &event);
+		}
+	}
+
+	if (bss_conf->cqm_rssi_thold &&
+	    ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
+	    !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
+		int sig = ifmgd->ave_beacon_signal / 16;
+		int last_event = ifmgd->last_cqm_event_signal;
+		int thold = bss_conf->cqm_rssi_thold;
+		int hyst = bss_conf->cqm_rssi_hyst;
+		if (sig < thold &&
+		    (last_event == 0 || sig < last_event - hyst)) {
+			ifmgd->last_cqm_event_signal = sig;
+			ieee80211_cqm_rssi_notify(
+				&sdata->vif,
+				NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
+				GFP_KERNEL);
+		} else if (sig > thold &&
+			   (last_event == 0 || sig > last_event + hyst)) {
+			ifmgd->last_cqm_event_signal = sig;
+			ieee80211_cqm_rssi_notify(
+				&sdata->vif,
+				NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
+				GFP_KERNEL);
+		}
+	}
+
+	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) {
+		mlme_dbg_ratelimited(sdata,
+				     "cancelling AP probe due to a received beacon\n");
+		ieee80211_reset_ap_probe(sdata);
+	}
+
+	/*
+	 * Push the beacon loss detection into the future since
+	 * we are processing a beacon from the AP just now.
+	 */
+	ieee80211_sta_reset_beacon_monitor(sdata);
+
+	ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
+	ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
+					  len - baselen, false, &elems,
+					  care_about_ies, ncrc);
+
+	if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
+		bool directed_tim = ieee80211_check_tim(elems.tim,
+							elems.tim_len,
+							ifmgd->aid);
+		if (directed_tim) {
+			if (local->hw.conf.dynamic_ps_timeout > 0) {
+				if (local->hw.conf.flags & IEEE80211_CONF_PS) {
+					local->hw.conf.flags &= ~IEEE80211_CONF_PS;
+					ieee80211_hw_config(local,
+							    IEEE80211_CONF_CHANGE_PS);
+				}
+				ieee80211_send_nullfunc(local, sdata, 0);
+			} else if (!local->pspolling && sdata->u.mgd.powersave) {
+				local->pspolling = true;
+
+				/*
+				 * Here is assumed that the driver will be
+				 * able to send ps-poll frame and receive a
+				 * response even though power save mode is
+				 * enabled, but some drivers might require
+				 * to disable power save here. This needs
+				 * to be investigated.
+				 */
+				ieee80211_send_pspoll(local, sdata);
+			}
+		}
+	}
+
+	if (sdata->vif.p2p) {
+		struct ieee80211_p2p_noa_attr noa = {};
+		int ret;
+
+		ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
+					    len - baselen,
+					    IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
+					    (u8 *) &noa, sizeof(noa));
+		if (ret >= 2) {
+			if (sdata->u.mgd.p2p_noa_index != noa.index) {
+				/* valid noa_attr and index changed */
+				sdata->u.mgd.p2p_noa_index = noa.index;
+				memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
+				changed |= BSS_CHANGED_P2P_PS;
+				/*
+				 * make sure we update all information, the CRC
+				 * mechanism doesn't look at P2P attributes.
+				 */
+				ifmgd->beacon_crc_valid = false;
+			}
+		} else if (sdata->u.mgd.p2p_noa_index != -1) {
+			/* noa_attr not found and we had valid noa_attr before */
+			sdata->u.mgd.p2p_noa_index = -1;
+			memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
+			changed |= BSS_CHANGED_P2P_PS;
+			ifmgd->beacon_crc_valid = false;
+		}
+	}
+
+	if (ifmgd->csa_waiting_bcn)
+		ieee80211_chswitch_post_beacon(sdata);
+
+	/*
+	 * Update beacon timing and dtim count on every beacon appearance. This
+	 * will allow the driver to use the most updated values. Do it before
+	 * comparing this one with last received beacon.
+	 * IMPORTANT: These parameters would possibly be out of sync by the time
+	 * the driver will use them. The synchronized view is currently
+	 * guaranteed only in certain callbacks.
+	 */
+	if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
+		sdata->vif.bss_conf.sync_tsf =
+			le64_to_cpu(mgmt->u.beacon.timestamp);
+		sdata->vif.bss_conf.sync_device_ts =
+			rx_status->device_timestamp;
+		if (elems.tim)
+			sdata->vif.bss_conf.sync_dtim_count =
+				elems.tim->dtim_count;
+		else
+			sdata->vif.bss_conf.sync_dtim_count = 0;
+	}
+
+	if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
+		return;
+	ifmgd->beacon_crc = ncrc;
+	ifmgd->beacon_crc_valid = true;
+
+	ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
+
+	ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
+					 rx_status->device_timestamp,
+					 &elems, true);
+
+	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_WMM) &&
+	    ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
+				     elems.wmm_param_len))
+		changed |= BSS_CHANGED_QOS;
+
+	/*
+	 * If we haven't had a beacon before, tell the driver about the
+	 * DTIM period (and beacon timing if desired) now.
+	 */
+	if (!ifmgd->have_beacon) {
+		/* a few bogus AP send dtim_period = 0 or no TIM IE */
+		if (elems.tim)
+			bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
+		else
+			bss_conf->dtim_period = 1;
+
+		changed |= BSS_CHANGED_BEACON_INFO;
+		ifmgd->have_beacon = true;
+
+		mutex_lock(&local->iflist_mtx);
+		ieee80211_recalc_ps(local, -1);
+		mutex_unlock(&local->iflist_mtx);
+
+		ieee80211_recalc_ps_vif(sdata);
+	}
+
+	if (elems.erp_info) {
+		erp_valid = true;
+		erp_value = elems.erp_info[0];
+	} else {
+		erp_valid = false;
+	}
+	changed |= ieee80211_handle_bss_capability(sdata,
+			le16_to_cpu(mgmt->u.beacon.capab_info),
+			erp_valid, erp_value);
+
+	mutex_lock(&local->sta_mtx);
+	sta = sta_info_get(sdata, bssid);
+
+	if (ieee80211_config_bw(sdata, sta,
+				elems.ht_cap_elem, elems.ht_operation,
+				elems.vht_operation, bssid, &changed)) {
+		mutex_unlock(&local->sta_mtx);
+		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
+				       WLAN_REASON_DEAUTH_LEAVING,
+				       true, deauth_buf);
+		ieee80211_report_disconnect(sdata, deauth_buf,
+					    sizeof(deauth_buf), true,
+					    WLAN_REASON_DEAUTH_LEAVING);
+		return;
+	}
+
+	if (sta && elems.opmode_notif)
+		ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
+					    rx_status->band, true);
+	mutex_unlock(&local->sta_mtx);
+
+	changed |= ieee80211_handle_pwr_constr(sdata, chan, mgmt,
+					       elems.country_elem,
+					       elems.country_elem_len,
+					       elems.pwr_constr_elem,
+					       elems.cisco_dtpc_elem);
+
+	ieee80211_bss_info_change_notify(sdata, changed);
+}
+
+void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
+				  struct sk_buff *skb)
+{
+	struct ieee80211_rx_status *rx_status;
+	struct ieee80211_mgmt *mgmt;
+	u16 fc;
+	struct ieee802_11_elems elems;
+	int ies_len;
+
+	rx_status = (struct ieee80211_rx_status *) skb->cb;
+	mgmt = (struct ieee80211_mgmt *) skb->data;
+	fc = le16_to_cpu(mgmt->frame_control);
+
+	sdata_lock(sdata);
+
+	switch (fc & IEEE80211_FCTL_STYPE) {
+	case IEEE80211_STYPE_BEACON:
+		ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len, rx_status);
+		break;
+	case IEEE80211_STYPE_PROBE_RESP:
+		ieee80211_rx_mgmt_probe_resp(sdata, skb);
+		break;
+	case IEEE80211_STYPE_AUTH:
+		ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
+		break;
+	case IEEE80211_STYPE_DEAUTH:
+		ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
+		break;
+	case IEEE80211_STYPE_DISASSOC:
+		ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
+		break;
+	case IEEE80211_STYPE_ASSOC_RESP:
+	case IEEE80211_STYPE_REASSOC_RESP:
+		ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len);
+		break;
+	case IEEE80211_STYPE_ACTION:
+		if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
+			ies_len = skb->len -
+				  offsetof(struct ieee80211_mgmt,
+					   u.action.u.chan_switch.variable);
+
+			if (ies_len < 0)
+				break;
+
+			ieee802_11_parse_elems(
+				mgmt->u.action.u.chan_switch.variable,
+				ies_len, true, &elems);
+
+			if (elems.parse_error)
+				break;
+
+			ieee80211_sta_process_chanswitch(sdata,
+						 rx_status->mactime,
+						 rx_status->device_timestamp,
+						 &elems, false);
+		} else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
+			ies_len = skb->len -
+				  offsetof(struct ieee80211_mgmt,
+					   u.action.u.ext_chan_switch.variable);
+
+			if (ies_len < 0)
+				break;
+
+			ieee802_11_parse_elems(
+				mgmt->u.action.u.ext_chan_switch.variable,
+				ies_len, true, &elems);
+
+			if (elems.parse_error)
+				break;
+
+			/* for the handling code pretend this was also an IE */
+			elems.ext_chansw_ie =
+				&mgmt->u.action.u.ext_chan_switch.data;
+
+			ieee80211_sta_process_chanswitch(sdata,
+						 rx_status->mactime,
+						 rx_status->device_timestamp,
+						 &elems, false);
+		}
+		break;
+	}
+	sdata_unlock(sdata);
+}
+
+static void ieee80211_sta_timer(unsigned long data)
+{
+	struct ieee80211_sub_if_data *sdata =
+		(struct ieee80211_sub_if_data *) data;
+
+	ieee80211_queue_work(&sdata->local->hw, &sdata->work);
+}
+
+static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
+					  u8 *bssid, u8 reason, bool tx)
+{
+	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
+
+	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
+			       tx, frame_buf);
+
+	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
+				    reason);
+}
+
+static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
+	u32 tx_flags = 0;
+
+	sdata_assert_lock(sdata);
+
+	if (WARN_ON_ONCE(!auth_data))
+		return -EINVAL;
+
+	auth_data->tries++;
+
+	if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
+		sdata_info(sdata, "authentication with %pM timed out\n",
+			   auth_data->bss->bssid);
+
+		/*
+		 * Most likely AP is not in the range so remove the
+		 * bss struct for that AP.
+		 */
+		cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
+
+		return -ETIMEDOUT;
+	}
+
+	drv_mgd_prepare_tx(local, sdata);
+
+	if (auth_data->bss->proberesp_ies) {
+		u16 trans = 1;
+		u16 status = 0;
+
+		sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
+			   auth_data->bss->bssid, auth_data->tries,
+			   IEEE80211_AUTH_MAX_TRIES);
+
+		auth_data->expected_transaction = 2;
+
+		if (auth_data->algorithm == WLAN_AUTH_SAE) {
+			trans = auth_data->sae_trans;
+			status = auth_data->sae_status;
+			auth_data->expected_transaction = trans;
+		}
+
+		if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
+			tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
+				   IEEE80211_TX_INTFL_MLME_CONN_TX;
+
+		ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
+				    auth_data->data, auth_data->data_len,
+				    auth_data->bss->bssid,
+				    auth_data->bss->bssid, NULL, 0, 0,
+				    tx_flags);
+	} else {
+		const u8 *ssidie;
+
+		sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
+			   auth_data->bss->bssid, auth_data->tries,
+			   IEEE80211_AUTH_MAX_TRIES);
+
+		rcu_read_lock();
+		ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
+		if (!ssidie) {
+			rcu_read_unlock();
+			return -EINVAL;
+		}
+		/*
+		 * Direct probe is sent to broadcast address as some APs
+		 * will not answer to direct packet in unassociated state.
+		 */
+		ieee80211_send_probe_req(sdata, sdata->vif.addr, NULL,
+					 ssidie + 2, ssidie[1],
+					 NULL, 0, (u32) -1, true, 0,
+					 auth_data->bss->channel, false);
+		rcu_read_unlock();
+	}
+
+	if (tx_flags == 0) {
+		auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
+		auth_data->timeout_started = true;
+		run_again(sdata, auth_data->timeout);
+	} else {
+		auth_data->timeout =
+			round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG);
+		auth_data->timeout_started = true;
+		run_again(sdata, auth_data->timeout);
+	}
+
+	return 0;
+}
+
+static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
+	struct ieee80211_local *local = sdata->local;
+
+	sdata_assert_lock(sdata);
+
+	assoc_data->tries++;
+	if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
+		sdata_info(sdata, "association with %pM timed out\n",
+			   assoc_data->bss->bssid);
+
+		/*
+		 * Most likely AP is not in the range so remove the
+		 * bss struct for that AP.
+		 */
+		cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
+
+		return -ETIMEDOUT;
+	}
+
+	sdata_info(sdata, "associate with %pM (try %d/%d)\n",
+		   assoc_data->bss->bssid, assoc_data->tries,
+		   IEEE80211_ASSOC_MAX_TRIES);
+	ieee80211_send_assoc(sdata);
+
+	if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
+		assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
+		assoc_data->timeout_started = true;
+		run_again(sdata, assoc_data->timeout);
+	} else {
+		assoc_data->timeout =
+			round_jiffies_up(jiffies +
+					 IEEE80211_ASSOC_TIMEOUT_LONG);
+		assoc_data->timeout_started = true;
+		run_again(sdata, assoc_data->timeout);
+	}
+
+	return 0;
+}
+
+void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
+				  __le16 fc, bool acked)
+{
+	struct ieee80211_local *local = sdata->local;
+
+	sdata->u.mgd.status_fc = fc;
+	sdata->u.mgd.status_acked = acked;
+	sdata->u.mgd.status_received = true;
+
+	ieee80211_queue_work(&local->hw, &sdata->work);
+}
+
+void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	sdata_lock(sdata);
+
+	if (ifmgd->status_received) {
+		__le16 fc = ifmgd->status_fc;
+		bool status_acked = ifmgd->status_acked;
+
+		ifmgd->status_received = false;
+		if (ifmgd->auth_data &&
+		    (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
+			if (status_acked) {
+				ifmgd->auth_data->timeout =
+					jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
+				run_again(sdata, ifmgd->auth_data->timeout);
+			} else {
+				ifmgd->auth_data->timeout = jiffies - 1;
+			}
+			ifmgd->auth_data->timeout_started = true;
+		} else if (ifmgd->assoc_data &&
+			   (ieee80211_is_assoc_req(fc) ||
+			    ieee80211_is_reassoc_req(fc))) {
+			if (status_acked) {
+				ifmgd->assoc_data->timeout =
+					jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
+				run_again(sdata, ifmgd->assoc_data->timeout);
+			} else {
+				ifmgd->assoc_data->timeout = jiffies - 1;
+			}
+			ifmgd->assoc_data->timeout_started = true;
+		}
+	}
+
+	if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
+	    time_after(jiffies, ifmgd->auth_data->timeout)) {
+		if (ifmgd->auth_data->done) {
+			/*
+			 * ok ... we waited for assoc but userspace didn't,
+			 * so let's just kill the auth data
+			 */
+			ieee80211_destroy_auth_data(sdata, false);
+		} else if (ieee80211_probe_auth(sdata)) {
+			u8 bssid[ETH_ALEN];
+			struct ieee80211_event event = {
+				.type = MLME_EVENT,
+				.u.mlme.data = AUTH_EVENT,
+				.u.mlme.status = MLME_TIMEOUT,
+			};
+
+			memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
+
+			ieee80211_destroy_auth_data(sdata, false);
+
+			cfg80211_auth_timeout(sdata->dev, bssid);
+			drv_event_callback(sdata->local, sdata, &event);
+		}
+	} else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
+		run_again(sdata, ifmgd->auth_data->timeout);
+
+	if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
+	    time_after(jiffies, ifmgd->assoc_data->timeout)) {
+		if ((ifmgd->assoc_data->need_beacon && !ifmgd->have_beacon) ||
+		    ieee80211_do_assoc(sdata)) {
+			struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
+			struct ieee80211_event event = {
+				.type = MLME_EVENT,
+				.u.mlme.data = ASSOC_EVENT,
+				.u.mlme.status = MLME_TIMEOUT,
+			};
+
+			ieee80211_destroy_assoc_data(sdata, false);
+			cfg80211_assoc_timeout(sdata->dev, bss);
+			drv_event_callback(sdata->local, sdata, &event);
+		}
+	} else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
+		run_again(sdata, ifmgd->assoc_data->timeout);
+
+	if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL &&
+	    ifmgd->associated) {
+		u8 bssid[ETH_ALEN];
+		int max_tries;
+
+		memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
+
+		if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
+			max_tries = max_nullfunc_tries;
+		else
+			max_tries = max_probe_tries;
+
+		/* ACK received for nullfunc probing frame */
+		if (!ifmgd->probe_send_count)
+			ieee80211_reset_ap_probe(sdata);
+		else if (ifmgd->nullfunc_failed) {
+			if (ifmgd->probe_send_count < max_tries) {
+				mlme_dbg(sdata,
+					 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
+					 bssid, ifmgd->probe_send_count,
+					 max_tries);
+				ieee80211_mgd_probe_ap_send(sdata);
+			} else {
+				mlme_dbg(sdata,
+					 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
+					 bssid);
+				ieee80211_sta_connection_lost(sdata, bssid,
+					WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
+					false);
+			}
+		} else if (time_is_after_jiffies(ifmgd->probe_timeout))
+			run_again(sdata, ifmgd->probe_timeout);
+		else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
+			mlme_dbg(sdata,
+				 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
+				 bssid, probe_wait_ms);
+			ieee80211_sta_connection_lost(sdata, bssid,
+				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
+		} else if (ifmgd->probe_send_count < max_tries) {
+			mlme_dbg(sdata,
+				 "No probe response from AP %pM after %dms, try %d/%i\n",
+				 bssid, probe_wait_ms,
+				 ifmgd->probe_send_count, max_tries);
+			ieee80211_mgd_probe_ap_send(sdata);
+		} else {
+			/*
+			 * We actually lost the connection ... or did we?
+			 * Let's make sure!
+			 */
+			wiphy_debug(local->hw.wiphy,
+				    "%s: No probe response from AP %pM"
+				    " after %dms, disconnecting.\n",
+				    sdata->name,
+				    bssid, probe_wait_ms);
+
+			ieee80211_sta_connection_lost(sdata, bssid,
+				WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
+		}
+	}
+
+	sdata_unlock(sdata);
+}
+
+static void ieee80211_sta_bcn_mon_timer(unsigned long data)
+{
+	struct ieee80211_sub_if_data *sdata =
+		(struct ieee80211_sub_if_data *) data;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
+		return;
+
+	sdata->u.mgd.connection_loss = false;
+	ieee80211_queue_work(&sdata->local->hw,
+			     &sdata->u.mgd.beacon_connection_loss_work);
+}
+
+static void ieee80211_sta_conn_mon_timer(unsigned long data)
+{
+	struct ieee80211_sub_if_data *sdata =
+		(struct ieee80211_sub_if_data *) data;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_local *local = sdata->local;
+
+	if (sdata->vif.csa_active && !ifmgd->csa_waiting_bcn)
+		return;
+
+	ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
+}
+
+static void ieee80211_sta_monitor_work(struct work_struct *work)
+{
+	struct ieee80211_sub_if_data *sdata =
+		container_of(work, struct ieee80211_sub_if_data,
+			     u.mgd.monitor_work);
+
+	ieee80211_mgd_probe_ap(sdata, false);
+}
+
+static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
+{
+	u32 flags;
+
+	if (sdata->vif.type == NL80211_IFTYPE_STATION) {
+		__ieee80211_stop_poll(sdata);
+
+		/* let's probe the connection once */
+		flags = sdata->local->hw.flags;
+		if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
+			ieee80211_queue_work(&sdata->local->hw,
+					     &sdata->u.mgd.monitor_work);
+		/* and do all the other regular work too */
+		ieee80211_queue_work(&sdata->local->hw, &sdata->work);
+	}
+}
+
+#ifdef CONFIG_PM
+void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
+
+	sdata_lock(sdata);
+
+	if (ifmgd->auth_data || ifmgd->assoc_data) {
+		const u8 *bssid = ifmgd->auth_data ?
+				ifmgd->auth_data->bss->bssid :
+				ifmgd->assoc_data->bss->bssid;
+
+		/*
+		 * If we are trying to authenticate / associate while suspending,
+		 * cfg80211 won't know and won't actually abort those attempts,
+		 * thus we need to do that ourselves.
+		 */
+		ieee80211_send_deauth_disassoc(sdata, bssid,
+					       IEEE80211_STYPE_DEAUTH,
+					       WLAN_REASON_DEAUTH_LEAVING,
+					       false, frame_buf);
+		if (ifmgd->assoc_data)
+			ieee80211_destroy_assoc_data(sdata, false);
+		if (ifmgd->auth_data)
+			ieee80211_destroy_auth_data(sdata, false);
+		cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf,
+				      IEEE80211_DEAUTH_FRAME_LEN);
+	}
+
+	/* This is a bit of a hack - we should find a better and more generic
+	 * solution to this. Normally when suspending, cfg80211 will in fact
+	 * deauthenticate. However, it doesn't (and cannot) stop an ongoing
+	 * auth (not so important) or assoc (this is the problem) process.
+	 *
+	 * As a consequence, it can happen that we are in the process of both
+	 * associating and suspending, and receive an association response
+	 * after cfg80211 has checked if it needs to disconnect, but before
+	 * we actually set the flag to drop incoming frames. This will then
+	 * cause the workqueue flush to process the association response in
+	 * the suspend, resulting in a successful association just before it
+	 * tries to remove the interface from the driver, which now though
+	 * has a channel context assigned ... this results in issues.
+	 *
+	 * To work around this (for now) simply deauth here again if we're
+	 * now connected.
+	 */
+	if (ifmgd->associated && !sdata->local->wowlan) {
+		u8 bssid[ETH_ALEN];
+		struct cfg80211_deauth_request req = {
+			.reason_code = WLAN_REASON_DEAUTH_LEAVING,
+			.bssid = bssid,
+		};
+
+		memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
+		ieee80211_mgd_deauth(sdata, &req);
+	}
+
+	sdata_unlock(sdata);
+}
+
+void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	sdata_lock(sdata);
+	if (!ifmgd->associated) {
+		sdata_unlock(sdata);
+		return;
+	}
+
+	if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
+		sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
+		mlme_dbg(sdata, "driver requested disconnect after resume\n");
+		ieee80211_sta_connection_lost(sdata,
+					      ifmgd->associated->bssid,
+					      WLAN_REASON_UNSPECIFIED,
+					      true);
+		sdata_unlock(sdata);
+		return;
+	}
+	sdata_unlock(sdata);
+}
+#endif
+
+/* interface setup */
+void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *ifmgd;
+
+	ifmgd = &sdata->u.mgd;
+	INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
+	INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
+	INIT_WORK(&ifmgd->beacon_connection_loss_work,
+		  ieee80211_beacon_connection_loss_work);
+	INIT_WORK(&ifmgd->csa_connection_drop_work,
+		  ieee80211_csa_connection_drop_work);
+	INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_mgd_work);
+	INIT_DELAYED_WORK(&ifmgd->tdls_peer_del_work,
+			  ieee80211_tdls_peer_del_work);
+	setup_timer(&ifmgd->timer, ieee80211_sta_timer,
+		    (unsigned long) sdata);
+	setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
+		    (unsigned long) sdata);
+	setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
+		    (unsigned long) sdata);
+	setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
+		    (unsigned long) sdata);
+	INIT_DELAYED_WORK(&ifmgd->tx_tspec_wk,
+			  ieee80211_sta_handle_tspec_ac_params_wk);
+
+	ifmgd->flags = 0;
+	ifmgd->powersave = sdata->wdev.ps;
+	ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
+	ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
+	ifmgd->p2p_noa_index = -1;
+
+	if (sdata->local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS)
+		ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
+	else
+		ifmgd->req_smps = IEEE80211_SMPS_OFF;
+
+	/* Setup TDLS data */
+	spin_lock_init(&ifmgd->teardown_lock);
+	ifmgd->teardown_skb = NULL;
+	ifmgd->orig_teardown_skb = NULL;
+}
+
+/* scan finished notification */
+void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
+{
+	struct ieee80211_sub_if_data *sdata;
+
+	/* Restart STA timers */
+	rcu_read_lock();
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		if (ieee80211_sdata_running(sdata))
+			ieee80211_restart_sta_timer(sdata);
+	}
+	rcu_read_unlock();
+}
+
+int ieee80211_max_network_latency(struct notifier_block *nb,
+				  unsigned long data, void *dummy)
+{
+	s32 latency_usec = (s32) data;
+	struct ieee80211_local *local =
+		container_of(nb, struct ieee80211_local,
+			     network_latency_notifier);
+
+	mutex_lock(&local->iflist_mtx);
+	ieee80211_recalc_ps(local, latency_usec);
+	mutex_unlock(&local->iflist_mtx);
+
+	return NOTIFY_OK;
+}
+
+static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
+				     struct cfg80211_bss *cbss)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	const u8 *ht_cap_ie, *vht_cap_ie;
+	const struct ieee80211_ht_cap *ht_cap;
+	const struct ieee80211_vht_cap *vht_cap;
+	u8 chains = 1;
+
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
+		return chains;
+
+	ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
+	if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
+		ht_cap = (void *)(ht_cap_ie + 2);
+		chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
+		/*
+		 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
+		 *	 "Tx Unequal Modulation Supported" fields.
+		 */
+	}
+
+	if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
+		return chains;
+
+	vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
+	if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
+		u8 nss;
+		u16 tx_mcs_map;
+
+		vht_cap = (void *)(vht_cap_ie + 2);
+		tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
+		for (nss = 8; nss > 0; nss--) {
+			if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
+					IEEE80211_VHT_MCS_NOT_SUPPORTED)
+				break;
+		}
+		/* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
+		chains = max(chains, nss);
+	}
+
+	return chains;
+}
+
+static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
+				  struct cfg80211_bss *cbss)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	const struct ieee80211_ht_cap *ht_cap = NULL;
+	const struct ieee80211_ht_operation *ht_oper = NULL;
+	const struct ieee80211_vht_operation *vht_oper = NULL;
+	struct ieee80211_supported_band *sband;
+	struct cfg80211_chan_def chandef;
+	int ret;
+
+	sband = local->hw.wiphy->bands[cbss->channel->band];
+
+	ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
+			  IEEE80211_STA_DISABLE_80P80MHZ |
+			  IEEE80211_STA_DISABLE_160MHZ);
+
+	rcu_read_lock();
+
+	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
+	    sband->ht_cap.ht_supported) {
+		const u8 *ht_oper_ie, *ht_cap_ie;
+
+		ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
+		if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
+			ht_oper = (void *)(ht_oper_ie + 2);
+
+		ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
+		if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap))
+			ht_cap = (void *)(ht_cap_ie + 2);
+
+		if (!ht_cap) {
+			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
+			ht_oper = NULL;
+		}
+	}
+
+	if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
+	    sband->vht_cap.vht_supported) {
+		const u8 *vht_oper_ie, *vht_cap;
+
+		vht_oper_ie = ieee80211_bss_get_ie(cbss,
+						   WLAN_EID_VHT_OPERATION);
+		if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
+			vht_oper = (void *)(vht_oper_ie + 2);
+		if (vht_oper && !ht_oper) {
+			vht_oper = NULL;
+			sdata_info(sdata,
+				   "AP advertised VHT without HT, disabling both\n");
+			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
+			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+		}
+
+		vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
+		if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
+			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+			vht_oper = NULL;
+		}
+	}
+
+	ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
+						     cbss->channel,
+						     ht_cap, ht_oper, vht_oper,
+						     &chandef, false);
+
+	sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
+				      local->rx_chains);
+
+	rcu_read_unlock();
+
+	/* will change later if needed */
+	sdata->smps_mode = IEEE80211_SMPS_OFF;
+
+	mutex_lock(&local->mtx);
+	/*
+	 * If this fails (possibly due to channel context sharing
+	 * on incompatible channels, e.g. 80+80 and 160 sharing the
+	 * same control channel) try to use a smaller bandwidth.
+	 */
+	ret = ieee80211_vif_use_channel(sdata, &chandef,
+					IEEE80211_CHANCTX_SHARED);
+
+	/* don't downgrade for 5 and 10 MHz channels, though. */
+	if (chandef.width == NL80211_CHAN_WIDTH_5 ||
+	    chandef.width == NL80211_CHAN_WIDTH_10)
+		goto out;
+
+	while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
+		ifmgd->flags |= ieee80211_chandef_downgrade(&chandef);
+		ret = ieee80211_vif_use_channel(sdata, &chandef,
+						IEEE80211_CHANCTX_SHARED);
+	}
+ out:
+	mutex_unlock(&local->mtx);
+	return ret;
+}
+
+static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
+				     struct cfg80211_bss *cbss, bool assoc)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_bss *bss = (void *)cbss->priv;
+	struct sta_info *new_sta = NULL;
+	struct ieee80211_supported_band *sband;
+	struct ieee80211_sta_ht_cap sta_ht_cap;
+	bool have_sta = false, is_override = false;
+	int err;
+
+	sband = local->hw.wiphy->bands[cbss->channel->band];
+
+	if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
+		return -EINVAL;
+
+	if (assoc) {
+		rcu_read_lock();
+		have_sta = sta_info_get(sdata, cbss->bssid);
+		rcu_read_unlock();
+	}
+
+	if (!have_sta) {
+		new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
+		if (!new_sta)
+			return -ENOMEM;
+	}
+
+	memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap));
+	ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap);
+
+	is_override = (sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) !=
+		      (sband->ht_cap.cap &
+		       IEEE80211_HT_CAP_SUP_WIDTH_20_40);
+
+	if (new_sta || is_override) {
+		err = ieee80211_prep_channel(sdata, cbss);
+		if (err) {
+			if (new_sta)
+				sta_info_free(local, new_sta);
+			return -EINVAL;
+		}
+	}
+
+	if (new_sta) {
+		u32 rates = 0, basic_rates = 0;
+		bool have_higher_than_11mbit;
+		int min_rate = INT_MAX, min_rate_index = -1;
+		struct ieee80211_chanctx_conf *chanctx_conf;
+		const struct cfg80211_bss_ies *ies;
+		int shift = ieee80211_vif_get_shift(&sdata->vif);
+		u32 rate_flags;
+
+		rcu_read_lock();
+		chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+		if (WARN_ON(!chanctx_conf)) {
+			rcu_read_unlock();
+			sta_info_free(local, new_sta);
+			return -EINVAL;
+		}
+		rate_flags = ieee80211_chandef_rate_flags(&chanctx_conf->def);
+		rcu_read_unlock();
+
+		ieee80211_get_rates(sband, bss->supp_rates,
+				    bss->supp_rates_len,
+				    &rates, &basic_rates,
+				    &have_higher_than_11mbit,
+				    &min_rate, &min_rate_index,
+				    shift, rate_flags);
+
+		/*
+		 * This used to be a workaround for basic rates missing
+		 * in the association response frame. Now that we no
+		 * longer use the basic rates from there, it probably
+		 * doesn't happen any more, but keep the workaround so
+		 * in case some *other* APs are buggy in different ways
+		 * we can connect -- with a warning.
+		 */
+		if (!basic_rates && min_rate_index >= 0) {
+			sdata_info(sdata,
+				   "No basic rates, using min rate instead\n");
+			basic_rates = BIT(min_rate_index);
+		}
+
+		new_sta->sta.supp_rates[cbss->channel->band] = rates;
+		sdata->vif.bss_conf.basic_rates = basic_rates;
+
+		/* cf. IEEE 802.11 9.2.12 */
+		if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
+		    have_higher_than_11mbit)
+			sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
+		else
+			sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
+
+		memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
+
+		/* set timing information */
+		sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
+		rcu_read_lock();
+		ies = rcu_dereference(cbss->beacon_ies);
+		if (ies) {
+			const u8 *tim_ie;
+
+			sdata->vif.bss_conf.sync_tsf = ies->tsf;
+			sdata->vif.bss_conf.sync_device_ts =
+				bss->device_ts_beacon;
+			tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
+						  ies->data, ies->len);
+			if (tim_ie && tim_ie[1] >= 2)
+				sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
+			else
+				sdata->vif.bss_conf.sync_dtim_count = 0;
+		} else if (!(local->hw.flags &
+					IEEE80211_HW_TIMING_BEACON_ONLY)) {
+			ies = rcu_dereference(cbss->proberesp_ies);
+			/* must be non-NULL since beacon IEs were NULL */
+			sdata->vif.bss_conf.sync_tsf = ies->tsf;
+			sdata->vif.bss_conf.sync_device_ts =
+				bss->device_ts_presp;
+			sdata->vif.bss_conf.sync_dtim_count = 0;
+		} else {
+			sdata->vif.bss_conf.sync_tsf = 0;
+			sdata->vif.bss_conf.sync_device_ts = 0;
+			sdata->vif.bss_conf.sync_dtim_count = 0;
+		}
+		rcu_read_unlock();
+
+		/* tell driver about BSSID, basic rates and timing */
+		ieee80211_bss_info_change_notify(sdata,
+			BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
+			BSS_CHANGED_BEACON_INT);
+
+		if (assoc)
+			sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
+
+		err = sta_info_insert(new_sta);
+		new_sta = NULL;
+		if (err) {
+			sdata_info(sdata,
+				   "failed to insert STA entry for the AP (error %d)\n",
+				   err);
+			return err;
+		}
+	} else
+		WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
+
+	/* Cancel scan to ensure that nothing interferes with connection */
+	if (local->scanning)
+		ieee80211_scan_cancel(local);
+
+	return 0;
+}
+
+/* config hooks */
+int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
+		       struct cfg80211_auth_request *req)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_mgd_auth_data *auth_data;
+	u16 auth_alg;
+	int err;
+
+	/* prepare auth data structure */
+
+	switch (req->auth_type) {
+	case NL80211_AUTHTYPE_OPEN_SYSTEM:
+		auth_alg = WLAN_AUTH_OPEN;
+		break;
+	case NL80211_AUTHTYPE_SHARED_KEY:
+		if (IS_ERR(local->wep_tx_tfm))
+			return -EOPNOTSUPP;
+		auth_alg = WLAN_AUTH_SHARED_KEY;
+		break;
+	case NL80211_AUTHTYPE_FT:
+		auth_alg = WLAN_AUTH_FT;
+		break;
+	case NL80211_AUTHTYPE_NETWORK_EAP:
+		auth_alg = WLAN_AUTH_LEAP;
+		break;
+	case NL80211_AUTHTYPE_SAE:
+		auth_alg = WLAN_AUTH_SAE;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
+			    req->ie_len, GFP_KERNEL);
+	if (!auth_data)
+		return -ENOMEM;
+
+	auth_data->bss = req->bss;
+
+	if (req->sae_data_len >= 4) {
+		__le16 *pos = (__le16 *) req->sae_data;
+		auth_data->sae_trans = le16_to_cpu(pos[0]);
+		auth_data->sae_status = le16_to_cpu(pos[1]);
+		memcpy(auth_data->data, req->sae_data + 4,
+		       req->sae_data_len - 4);
+		auth_data->data_len += req->sae_data_len - 4;
+	}
+
+	if (req->ie && req->ie_len) {
+		memcpy(&auth_data->data[auth_data->data_len],
+		       req->ie, req->ie_len);
+		auth_data->data_len += req->ie_len;
+	}
+
+	if (req->key && req->key_len) {
+		auth_data->key_len = req->key_len;
+		auth_data->key_idx = req->key_idx;
+		memcpy(auth_data->key, req->key, req->key_len);
+	}
+
+	auth_data->algorithm = auth_alg;
+
+	/* try to authenticate/probe */
+
+	if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
+	    ifmgd->assoc_data) {
+		err = -EBUSY;
+		goto err_free;
+	}
+
+	if (ifmgd->auth_data)
+		ieee80211_destroy_auth_data(sdata, false);
+
+	/* prep auth_data so we don't go into idle on disassoc */
+	ifmgd->auth_data = auth_data;
+
+	if (ifmgd->associated) {
+		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
+
+		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
+				       WLAN_REASON_UNSPECIFIED,
+				       false, frame_buf);
+
+		ieee80211_report_disconnect(sdata, frame_buf,
+					    sizeof(frame_buf), true,
+					    WLAN_REASON_UNSPECIFIED);
+	}
+
+	sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
+
+	err = ieee80211_prep_connection(sdata, req->bss, false);
+	if (err)
+		goto err_clear;
+
+	err = ieee80211_probe_auth(sdata);
+	if (err) {
+		sta_info_destroy_addr(sdata, req->bss->bssid);
+		goto err_clear;
+	}
+
+	/* hold our own reference */
+	cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
+	return 0;
+
+ err_clear:
+	eth_zero_addr(ifmgd->bssid);
+	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
+	ifmgd->auth_data = NULL;
+ err_free:
+	kfree(auth_data);
+	return err;
+}
+
+static bool ieee80211_usable_wmm_params(struct ieee80211_sub_if_data *sdata,
+					const u8 *wmm_param, int len)
+{
+	const u8 *pos;
+	size_t left;
+
+	if (len < 8)
+		return false;
+
+	if (wmm_param[5] != 1 /* version */)
+		return false;
+
+	pos = wmm_param + 8;
+	left = len - 8;
+
+	for (; left >= 4; left -= 4, pos += 4) {
+		u8 aifsn = pos[0] & 0x0f;
+		u8 ecwmin = pos[1] & 0x0f;
+		u8 ecwmax = (pos[1] & 0xf0) >> 4;
+		int aci = (pos[0] >> 5) & 0x03;
+
+		if (aifsn < 2) {
+			sdata_info(sdata,
+				   "AP has invalid WMM params (AIFSN=%d for ACI %d), disabling WMM\n",
+				   aifsn, aci);
+			return false;
+		}
+		if (ecwmin > ecwmax) {
+			sdata_info(sdata,
+				   "AP has invalid WMM params (ECWmin/max=%d/%d for ACI %d), disabling WMM\n",
+				   ecwmin, ecwmax, aci);
+			return false;
+		}
+	}
+
+	return true;
+}
+
+int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
+			struct cfg80211_assoc_request *req)
+{
+	struct ieee80211_local *local = sdata->local;
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	struct ieee80211_bss *bss = (void *)req->bss->priv;
+	struct ieee80211_mgd_assoc_data *assoc_data;
+	const struct cfg80211_bss_ies *beacon_ies;
+	struct ieee80211_supported_band *sband;
+	const u8 *ssidie, *ht_ie, *vht_ie;
+	int i, err;
+
+	assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
+	if (!assoc_data)
+		return -ENOMEM;
+
+	rcu_read_lock();
+	ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
+	if (!ssidie) {
+		rcu_read_unlock();
+		kfree(assoc_data);
+		return -EINVAL;
+	}
+	memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
+	assoc_data->ssid_len = ssidie[1];
+	rcu_read_unlock();
+
+	if (ifmgd->associated) {
+		u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
+
+		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
+				       WLAN_REASON_UNSPECIFIED,
+				       false, frame_buf);
+
+		ieee80211_report_disconnect(sdata, frame_buf,
+					    sizeof(frame_buf), true,
+					    WLAN_REASON_UNSPECIFIED);
+	}
+
+	if (ifmgd->auth_data && !ifmgd->auth_data->done) {
+		err = -EBUSY;
+		goto err_free;
+	}
+
+	if (ifmgd->assoc_data) {
+		err = -EBUSY;
+		goto err_free;
+	}
+
+	if (ifmgd->auth_data) {
+		bool match;
+
+		/* keep sta info, bssid if matching */
+		match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
+		ieee80211_destroy_auth_data(sdata, match);
+	}
+
+	/* prepare assoc data */
+
+	ifmgd->beacon_crc_valid = false;
+
+	assoc_data->wmm = bss->wmm_used &&
+			  (local->hw.queues >= IEEE80211_NUM_ACS);
+	if (assoc_data->wmm) {
+		/* try to check validity of WMM params IE */
+		const struct cfg80211_bss_ies *ies;
+		const u8 *wp, *start, *end;
+
+		rcu_read_lock();
+		ies = rcu_dereference(req->bss->ies);
+		start = ies->data;
+		end = start + ies->len;
+
+		while (true) {
+			wp = cfg80211_find_vendor_ie(
+				WLAN_OUI_MICROSOFT,
+				WLAN_OUI_TYPE_MICROSOFT_WMM,
+				start, end - start);
+			if (!wp)
+				break;
+			start = wp + wp[1] + 2;
+			/* if this IE is too short, try the next */
+			if (wp[1] <= 4)
+				continue;
+			/* if this IE is WMM params, we found what we wanted */
+			if (wp[6] == 1)
+				break;
+		}
+
+		if (!wp || !ieee80211_usable_wmm_params(sdata, wp + 2,
+							wp[1] - 2)) {
+			assoc_data->wmm = false;
+			ifmgd->flags |= IEEE80211_STA_DISABLE_WMM;
+		}
+		rcu_read_unlock();
+	}
+
+	/*
+	 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
+	 * We still associate in non-HT mode (11a/b/g) if any one of these
+	 * ciphers is configured as pairwise.
+	 * We can set this to true for non-11n hardware, that'll be checked
+	 * separately along with the peer capabilities.
+	 */
+	for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
+		if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
+		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
+		    req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
+			ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
+			ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+			netdev_info(sdata->dev,
+				    "disabling HT/VHT due to WEP/TKIP use\n");
+		}
+	}
+
+	if (req->flags & ASSOC_REQ_DISABLE_HT) {
+		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
+		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+	}
+
+	if (req->flags & ASSOC_REQ_DISABLE_VHT)
+		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+
+	/* Also disable HT if we don't support it or the AP doesn't use WMM */
+	sband = local->hw.wiphy->bands[req->bss->channel->band];
+	if (!sband->ht_cap.ht_supported ||
+	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
+	    ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
+		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
+		if (!bss->wmm_used &&
+		    !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
+			netdev_info(sdata->dev,
+				    "disabling HT as WMM/QoS is not supported by the AP\n");
+	}
+
+	/* disable VHT if we don't support it or the AP doesn't use WMM */
+	if (!sband->vht_cap.vht_supported ||
+	    local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used ||
+	    ifmgd->flags & IEEE80211_STA_DISABLE_WMM) {
+		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+		if (!bss->wmm_used &&
+		    !(ifmgd->flags & IEEE80211_STA_DISABLE_WMM))
+			netdev_info(sdata->dev,
+				    "disabling VHT as WMM/QoS is not supported by the AP\n");
+	}
+
+	memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
+	memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
+	       sizeof(ifmgd->ht_capa_mask));
+
+	memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
+	memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
+	       sizeof(ifmgd->vht_capa_mask));
+
+	if (req->ie && req->ie_len) {
+		memcpy(assoc_data->ie, req->ie, req->ie_len);
+		assoc_data->ie_len = req->ie_len;
+	}
+
+	assoc_data->bss = req->bss;
+
+	if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
+		if (ifmgd->powersave)
+			sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
+		else
+			sdata->smps_mode = IEEE80211_SMPS_OFF;
+	} else
+		sdata->smps_mode = ifmgd->req_smps;
+
+	assoc_data->capability = req->bss->capability;
+	assoc_data->supp_rates = bss->supp_rates;
+	assoc_data->supp_rates_len = bss->supp_rates_len;
+
+	rcu_read_lock();
+	ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
+	if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
+		assoc_data->ap_ht_param =
+			((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
+	else
+		ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
+	vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
+	if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
+		memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
+		       sizeof(struct ieee80211_vht_cap));
+	else
+		ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
+	rcu_read_unlock();
+
+	if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) &&
+		 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK),
+	     "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"))
+		sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
+
+	if (bss->wmm_used && bss->uapsd_supported &&
+	    (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) {
+		assoc_data->uapsd = true;
+		ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
+	} else {
+		assoc_data->uapsd = false;
+		ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
+	}
+
+	if (req->prev_bssid)
+		memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
+
+	if (req->use_mfp) {
+		ifmgd->mfp = IEEE80211_MFP_REQUIRED;
+		ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
+	} else {
+		ifmgd->mfp = IEEE80211_MFP_DISABLED;
+		ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
+	}
+
+	if (req->flags & ASSOC_REQ_USE_RRM)
+		ifmgd->flags |= IEEE80211_STA_ENABLE_RRM;
+	else
+		ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM;
+
+	if (req->crypto.control_port)
+		ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
+	else
+		ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
+
+	sdata->control_port_protocol = req->crypto.control_port_ethertype;
+	sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
+	sdata->encrypt_headroom = ieee80211_cs_headroom(local, &req->crypto,
+							sdata->vif.type);
+
+	/* kick off associate process */
+
+	ifmgd->assoc_data = assoc_data;
+	ifmgd->dtim_period = 0;
+	ifmgd->have_beacon = false;
+
+	err = ieee80211_prep_connection(sdata, req->bss, true);
+	if (err)
+		goto err_clear;
+
+	rcu_read_lock();
+	beacon_ies = rcu_dereference(req->bss->beacon_ies);
+
+	if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
+	    !beacon_ies) {
+		/*
+		 * Wait up to one beacon interval ...
+		 * should this be more if we miss one?
+		 */
+		sdata_info(sdata, "waiting for beacon from %pM\n",
+			   ifmgd->bssid);
+		assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
+		assoc_data->timeout_started = true;
+		assoc_data->need_beacon = true;
+	} else if (beacon_ies) {
+		const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
+						    beacon_ies->data,
+						    beacon_ies->len);
+		u8 dtim_count = 0;
+
+		if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
+			const struct ieee80211_tim_ie *tim;
+			tim = (void *)(tim_ie + 2);
+			ifmgd->dtim_period = tim->dtim_period;
+			dtim_count = tim->dtim_count;
+		}
+		ifmgd->have_beacon = true;
+		assoc_data->timeout = jiffies;
+		assoc_data->timeout_started = true;
+
+		if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
+			sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
+			sdata->vif.bss_conf.sync_device_ts =
+				bss->device_ts_beacon;
+			sdata->vif.bss_conf.sync_dtim_count = dtim_count;
+		}
+	} else {
+		assoc_data->timeout = jiffies;
+		assoc_data->timeout_started = true;
+	}
+	rcu_read_unlock();
+
+	run_again(sdata, assoc_data->timeout);
+
+	if (bss->corrupt_data) {
+		char *corrupt_type = "data";
+		if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
+			if (bss->corrupt_data &
+					IEEE80211_BSS_CORRUPT_PROBE_RESP)
+				corrupt_type = "beacon and probe response";
+			else
+				corrupt_type = "beacon";
+		} else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
+			corrupt_type = "probe response";
+		sdata_info(sdata, "associating with AP with corrupt %s\n",
+			   corrupt_type);
+	}
+
+	return 0;
+ err_clear:
+	eth_zero_addr(ifmgd->bssid);
+	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
+	ifmgd->assoc_data = NULL;
+ err_free:
+	kfree(assoc_data);
+	return err;
+}
+
+int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
+			 struct cfg80211_deauth_request *req)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
+	bool tx = !req->local_state_change;
+
+	if (ifmgd->auth_data &&
+	    ether_addr_equal(ifmgd->auth_data->bss->bssid, req->bssid)) {
+		sdata_info(sdata,
+			   "aborting authentication with %pM by local choice (Reason: %u=%s)\n",
+			   req->bssid, req->reason_code,
+			   ieee80211_get_reason_code_string(req->reason_code));
+
+		drv_mgd_prepare_tx(sdata->local, sdata);
+		ieee80211_send_deauth_disassoc(sdata, req->bssid,
+					       IEEE80211_STYPE_DEAUTH,
+					       req->reason_code, tx,
+					       frame_buf);
+		ieee80211_destroy_auth_data(sdata, false);
+		ieee80211_report_disconnect(sdata, frame_buf,
+					    sizeof(frame_buf), true,
+					    req->reason_code);
+
+		return 0;
+	}
+
+	if (ifmgd->associated &&
+	    ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
+		sdata_info(sdata,
+			   "deauthenticating from %pM by local choice (Reason: %u=%s)\n",
+			   req->bssid, req->reason_code,
+			   ieee80211_get_reason_code_string(req->reason_code));
+
+		ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
+				       req->reason_code, tx, frame_buf);
+		ieee80211_report_disconnect(sdata, frame_buf,
+					    sizeof(frame_buf), true,
+					    req->reason_code);
+		return 0;
+	}
+
+	return -ENOTCONN;
+}
+
+int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
+			   struct cfg80211_disassoc_request *req)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+	u8 bssid[ETH_ALEN];
+	u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
+
+	/*
+	 * cfg80211 should catch this ... but it's racy since
+	 * we can receive a disassoc frame, process it, hand it
+	 * to cfg80211 while that's in a locked section already
+	 * trying to tell us that the user wants to disconnect.
+	 */
+	if (ifmgd->associated != req->bss)
+		return -ENOLINK;
+
+	sdata_info(sdata,
+		   "disassociating from %pM by local choice (Reason: %u=%s)\n",
+		   req->bss->bssid, req->reason_code, ieee80211_get_reason_code_string(req->reason_code));
+
+	memcpy(bssid, req->bss->bssid, ETH_ALEN);
+	ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
+			       req->reason_code, !req->local_state_change,
+			       frame_buf);
+
+	ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true,
+				    req->reason_code);
+
+	return 0;
+}
+
+void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
+{
+	struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
+
+	/*
+	 * Make sure some work items will not run after this,
+	 * they will not do anything but might not have been
+	 * cancelled when disconnecting.
+	 */
+	cancel_work_sync(&ifmgd->monitor_work);
+	cancel_work_sync(&ifmgd->beacon_connection_loss_work);
+	cancel_work_sync(&ifmgd->request_smps_work);
+	cancel_work_sync(&ifmgd->csa_connection_drop_work);
+	cancel_work_sync(&ifmgd->chswitch_work);
+	cancel_delayed_work_sync(&ifmgd->tdls_peer_del_work);
+
+	sdata_lock(sdata);
+	if (ifmgd->assoc_data) {
+		struct cfg80211_bss *bss = ifmgd->assoc_data->bss;
+		ieee80211_destroy_assoc_data(sdata, false);
+		cfg80211_assoc_timeout(sdata->dev, bss);
+	}
+	if (ifmgd->auth_data)
+		ieee80211_destroy_auth_data(sdata, false);
+	spin_lock_bh(&ifmgd->teardown_lock);
+	if (ifmgd->teardown_skb) {
+		kfree_skb(ifmgd->teardown_skb);
+		ifmgd->teardown_skb = NULL;
+		ifmgd->orig_teardown_skb = NULL;
+	}
+	spin_unlock_bh(&ifmgd->teardown_lock);
+	del_timer_sync(&ifmgd->timer);
+	sdata_unlock(sdata);
+}
+
+void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
+			       enum nl80211_cqm_rssi_threshold_event rssi_event,
+			       gfp_t gfp)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+	trace_api_cqm_rssi_notify(sdata, rssi_event);
+
+	cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
+}
+EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
+
+void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp)
+{
+	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+	trace_api_cqm_beacon_loss_notify(sdata->local, sdata);
+
+	cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp);
+}
+EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify);