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ALSA: x86: Clear the pdata.notify_lpe_audio pointer before teardown 

Clear the notify function pointer in the platform data before we tear
down the driver. Otherwise i915 would end up calling a stale function
pointer and possibly explode.

Cc: stable@vger.kernel.org
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170427160231.13337-3-ville.syrjala@linux.intel.com
Reviewed-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Ville Syrjälä 2017-04-27 19:02:21 +03:00
parent 183c00350c
commit 8d5c30308d
1 changed files with 5 additions and 0 deletions
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5
sound/x86/intel_hdmi_audio.c
View File

@ -1665,6 +1665,11 @@ static int __maybe_unused hdmi_lpe_audio_resume(struct device *dev)
static void hdmi_lpe_audio_free(struct snd_card *card)
{
struct snd_intelhad *ctx = card->private_data;
struct intel_hdmi_lpe_audio_pdata *pdata = ctx->dev->platform_data;
spin_lock_irq(&pdata->lpe_audio_slock);
pdata->notify_audio_lpe = NULL;
spin_unlock_irq(&pdata->lpe_audio_slock);
cancel_work_sync(&ctx->hdmi_audio_wq);