Linux-libre 4.2-gnu

1 files changed, 23 insertions, 21 deletions

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index c502c2277..526ebc0c7 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -660,12 +660,6 @@ static void xhci_only_stop_hcd(struct usb_hcd *hcd)
 
 	spin_lock_irq(&xhci->lock);
 	xhci_halt(xhci);
-
-	/* The shared_hcd is going to be deallocated shortly (the USB core only
-	 * calls this function when allocation fails in usb_add_hcd(), or
-	 * usb_remove_hcd() is called).  So we need to unset xHCI's pointer.
-	 */
-	xhci->shared_hcd = NULL;
 	spin_unlock_irq(&xhci->lock);
 }
 
@@ -897,6 +891,9 @@ int xhci_suspend(struct xhci_hcd *xhci, bool do_wakeup)
 	struct usb_hcd		*hcd = xhci_to_hcd(xhci);
 	u32			command;
 
+	if (!hcd->state)
+		return 0;
+
 	if (hcd->state != HC_STATE_SUSPENDED ||
 			xhci->shared_hcd->state != HC_STATE_SUSPENDED)
 		return -EINVAL;
@@ -983,6 +980,9 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated)
 	int			retval = 0;
 	bool			comp_timer_running = false;
 
+	if (!hcd->state)
+		return 0;
+
 	/* Wait a bit if either of the roothubs need to settle from the
 	 * transition into bus suspend.
 	 */
@@ -3772,8 +3772,6 @@ disable_slot:
 /*
  * Issue an Address Device command and optionally send a corresponding
  * SetAddress request to the device.
- * We should be protected by the usb_address0_mutex in hub_wq's hub_port_init,
- * so we should only issue and wait on one address command at the same time.
  */
 static int xhci_setup_device(struct usb_hcd *hcd, struct usb_device *udev,
 			     enum xhci_setup_dev setup)
@@ -4845,10 +4843,7 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)
 	hcd->self.no_stop_on_short = 1;
 
 	if (usb_hcd_is_primary_hcd(hcd)) {
-		xhci = kzalloc(sizeof(struct xhci_hcd), GFP_KERNEL);
-		if (!xhci)
-			return -ENOMEM;
-		*((struct xhci_hcd **) hcd->hcd_priv) = xhci;
+		xhci = hcd_to_xhci(hcd);
 		xhci->main_hcd = hcd;
 		/* Mark the first roothub as being USB 2.0.
 		 * The xHCI driver will register the USB 3.0 roothub.
@@ -4897,13 +4892,13 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)
 	/* Make sure the HC is halted. */
 	retval = xhci_halt(xhci);
 	if (retval)
-		goto error;
+		return retval;
 
 	xhci_dbg(xhci, "Resetting HCD\n");
 	/* Reset the internal HC memory state and registers. */
 	retval = xhci_reset(xhci);
 	if (retval)
-		goto error;
+		return retval;
 	xhci_dbg(xhci, "Reset complete\n");
 
 	/* Set dma_mask and coherent_dma_mask to 64-bits,
@@ -4918,16 +4913,13 @@ int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks)
 	/* Initialize HCD and host controller data structures. */
 	retval = xhci_init(hcd);
 	if (retval)
-		goto error;
+		return retval;
 	xhci_dbg(xhci, "Called HCD init\n");
 
 	xhci_info(xhci, "hcc params 0x%08x hci version 0x%x quirks 0x%08x\n",
 		  xhci->hcc_params, xhci->hci_version, xhci->quirks);
 
 	return 0;
-error:
-	kfree(xhci);
-	return retval;
 }
 EXPORT_SYMBOL_GPL(xhci_gen_setup);
 
@@ -4992,11 +4984,21 @@ static const struct hc_driver xhci_hc_driver = {
 	.find_raw_port_number =	xhci_find_raw_port_number,
 };
 
-void xhci_init_driver(struct hc_driver *drv, int (*setup_fn)(struct usb_hcd *))
+void xhci_init_driver(struct hc_driver *drv,
+		      const struct xhci_driver_overrides *over)
 {
-	BUG_ON(!setup_fn);
+	BUG_ON(!over);
+
+	/* Copy the generic table to drv then apply the overrides */
 	*drv = xhci_hc_driver;
-	drv->reset = setup_fn;
+
+	if (over) {
+		drv->hcd_priv_size += over->extra_priv_size;
+		if (over->reset)
+			drv->reset = over->reset;
+		if (over->start)
+			drv->start = over->start;
+	}
 }
 EXPORT_SYMBOL_GPL(xhci_init_driver);