From d635711daa98be86d4c7fd01499c34f566b54ccb Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Fri, 10 Jun 2016 05:30:17 -0300 Subject: Linux-libre 4.6.2-gnu --- sound/hda/hdac_i915.c | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) (limited to 'sound/hda/hdac_i915.c') diff --git a/sound/hda/hdac_i915.c b/sound/hda/hdac_i915.c index 69ead7150..607bbeaeb 100644 --- a/sound/hda/hdac_i915.c +++ b/sound/hda/hdac_i915.c @@ -166,6 +166,8 @@ EXPORT_SYMBOL_GPL(snd_hdac_i915_set_bclk); */ static int pin2port(hda_nid_t pin_nid) { + if (WARN_ON(pin_nid < 5 || pin_nid > 7)) + return -1; return pin_nid - 4; } @@ -184,10 +186,14 @@ static int pin2port(hda_nid_t pin_nid) int snd_hdac_sync_audio_rate(struct hdac_bus *bus, hda_nid_t nid, int rate) { struct i915_audio_component *acomp = bus->audio_component; + int port; if (!acomp || !acomp->ops || !acomp->ops->sync_audio_rate) return -ENODEV; - return acomp->ops->sync_audio_rate(acomp->dev, pin2port(nid), rate); + port = pin2port(nid); + if (port < 0) + return -EINVAL; + return acomp->ops->sync_audio_rate(acomp->dev, port, rate); } EXPORT_SYMBOL_GPL(snd_hdac_sync_audio_rate); @@ -215,11 +221,15 @@ int snd_hdac_acomp_get_eld(struct hdac_bus *bus, hda_nid_t nid, bool *audio_enabled, char *buffer, int max_bytes) { struct i915_audio_component *acomp = bus->audio_component; + int port; if (!acomp || !acomp->ops || !acomp->ops->get_eld) return -ENODEV; - return acomp->ops->get_eld(acomp->dev, pin2port(nid), audio_enabled, + port = pin2port(nid); + if (port < 0) + return -EINVAL; + return acomp->ops->get_eld(acomp->dev, port, audio_enabled, buffer, max_bytes); } EXPORT_SYMBOL_GPL(snd_hdac_acomp_get_eld); @@ -297,6 +307,18 @@ int snd_hdac_i915_register_notifier(const struct i915_audio_component_audio_ops } EXPORT_SYMBOL_GPL(snd_hdac_i915_register_notifier); +/* check whether intel graphics is present */ +static bool i915_gfx_present(void) +{ + static struct pci_device_id ids[] = { + { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_ANY_ID), + .class = PCI_BASE_CLASS_DISPLAY << 16, + .class_mask = 0xff << 16 }, + {} + }; + return pci_dev_present(ids); +} + /** * snd_hdac_i915_init - Initialize i915 audio component * @bus: HDA core bus @@ -316,6 +338,9 @@ int snd_hdac_i915_init(struct hdac_bus *bus) struct i915_audio_component *acomp; int ret; + if (!i915_gfx_present()) + return -ENODEV; + acomp = kzalloc(sizeof(*acomp), GFP_KERNEL); if (!acomp) return -ENOMEM; -- cgit v1.2.3-54-g00ecf