This is a note to let you know that I've just added the patch titled
ALSA: x86: Clear the pdata.notify_lpe_audio pointer before teardown
to the 4.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
alsa-x86-clear-the-pdata.notify_lpe_audio-pointer-before-teardown.patch
and it can be found in the queue-4.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8d5c30308d7c5a17db96fa5452c0232f633377c2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Thu, 27 Apr 2017 19:02:21 +0300
Subject: ALSA: x86: Clear the pdata.notify_lpe_audio pointer before teardown
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From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
commit 8d5c30308d7c5a17db96fa5452c0232f633377c2 upstream.
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: Takashi Iwai <tiwai@xxxxxxx>
Cc: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Link: http://patchwork.freedesktop.org/patch/msgid/20170427160231.13337-3-ville.syrjala@xxxxxxxxxxxxxxx
Reviewed-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/x86/intel_hdmi_audio.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/sound/x86/intel_hdmi_audio.c
+++ b/sound/x86/intel_hdmi_audio.c
@@ -1665,6 +1665,11 @@ static int __maybe_unused hdmi_lpe_audio
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);
Patches currently in stable-queue which might be from ville.syrjala@xxxxxxxxxxxxxxx are
queue-4.12/alsa-x86-clear-the-pdata.notify_lpe_audio-pointer-before-teardown.patch