Patch "ALSA: x86: Fix missing spinlock and mutex initializations" has been added to the 4.15-stable tree

Patch "ALSA: x86: Fix missing spinlock and mutex initializations" has been added to the 4.15-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ALSA: x86: Fix missing spinlock and mutex initializations

to the 4.15-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-fix-missing-spinlock-and-mutex-initializations.patch
and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 350144069abf351c743d766b2fba9cb9b7cd32a1 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Wed, 28 Feb 2018 08:36:06 +0100
Subject: ALSA: x86: Fix missing spinlock and mutex initializations

From: Takashi Iwai <tiwai@suse.de>

commit 350144069abf351c743d766b2fba9cb9b7cd32a1 upstream.

The commit change for supporting the multiple ports moved involved
some code shuffling, and there the initializations of spinlock and
mutex in snd_intelhad object were dropped mistakenly.

This patch adds the missing initializations again for each port.

Fixes: b4eb0d522fcb ("ALSA: x86: Split snd_intelhad into card and PCM specific structures")
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 sound/x86/intel_hdmi_audio.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/sound/x86/intel_hdmi_audio.c
+++ b/sound/x86/intel_hdmi_audio.c
@@ -1827,6 +1827,8 @@ static int hdmi_lpe_audio_probe(struct p
 		ctx->port = port;
 		ctx->pipe = -1;
 
+		spin_lock_init(&ctx->had_spinlock);
+		mutex_init(&ctx->mutex);
 		INIT_WORK(&ctx->hdmi_audio_wq, had_audio_wq);
 
 		ret = snd_pcm_new(card, INTEL_HAD, port, MAX_PB_STREAMS,


Patches currently in stable-queue which might be from tiwai@suse.de are

queue-4.15/alsa-hda-add-a-power_save-blacklist.patch
queue-4.15/alsa-hda-fix-pincfg-at-resume-on-lenovo-t470-dock.patch
queue-4.15/alsa-x86-fix-missing-spinlock-and-mutex-initializations.patch
queue-4.15/alsa-usb-audio-add-a-quirck-for-b-w-px-headphones.patch
queue-4.15/alsa-control-fix-memory-corruption-risk-in-snd_ctl_elem_read.patch