This is a note to let you know that I've just added the patch titled
ALSA: hda: Flush pending unsolicited events before suspend
to the 5.4-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-hda-flush-pending-unsolicited-events-before-suspend.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 13661fc48461282e43fe8f76bf5bf449b3d40687 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@xxxxxxx>
Date: Wed, 10 Mar 2021 12:28:07 +0100
Subject: ALSA: hda: Flush pending unsolicited events before suspend
From: Takashi Iwai <tiwai@xxxxxxx>
commit 13661fc48461282e43fe8f76bf5bf449b3d40687 upstream.
The HD-audio controller driver processes the unsolicited events via
its work asynchronously, and this might be pending when the system
goes to suspend. When a lengthy event handling like ELD byte reads is
running, this might trigger unexpected accesses among suspend/resume
procedure, typically seen with Nvidia driver that still requires the
handling via unsolicited event verbs for ELD updates.
This patch adds the flush of unsol_work to assure that pending events
are processed before going into suspend.
Buglink: https://bugzilla.suse.com/show_bug.cgi?id=1182377
Reported-and-tested-by: Abhishek Sahu <abhsahu@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210310112809.9215-2-tiwai@xxxxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/pci/hda/hda_intel.c | 2 ++
1 file changed, 2 insertions(+)
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1025,6 +1025,8 @@ static int azx_prepare(struct device *de
chip = card->private_data;
chip->pm_prepared = 1;
+ flush_work(&azx_bus(chip)->unsol_work);
+
/* HDA controller always requires different WAKEEN for runtime suspend
* and system suspend, so don't use direct-complete here.
*/
Patches currently in stable-queue which might be from tiwai@xxxxxxx are
queue-5.4/alsa-hda-avoid-spurious-unsol-event-handling-during-s3-s4.patch
queue-5.4/alsa-hda-drop-the-batch-workaround-for-amd-controllers.patch
queue-5.4/alsa-usb-audio-fix-cannot-get-freq-eq-errors-on-dell-ae515-sound-bar.patch
queue-5.4/alsa-hda-flush-pending-unsolicited-events-before-suspend.patch
queue-5.4/alsa-usb-add-plantronics-c320-m-usb-ctrl-msg-delay-quirk.patch
queue-5.4/alsa-hda-ca0132-add-sound-blasterx-ae-5-plus-support.patch
queue-5.4/alsa-hda-hdmi-cancel-pending-works-before-suspend.patch
queue-5.4/alsa-usb-audio-apply-the-control-quirk-to-plantronics-headsets.patch
