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 4.11-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-4.11 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 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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-4.11/alsa-x86-clear-the-pdata.notify_lpe_audio-pointer-before-teardown.patch