This is a note to let you know that I've just added the patch titled
ALSA: hda: Fix crash due to jack poll in suspend
to the 5.19-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-fix-crash-due-to-jack-poll-in-suspend.patch
and it can be found in the queue-5.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 636aa8807b5780b76609b40cd3d3e1b5a225471c Mon Sep 17 00:00:00 2001
From: Mohan Kumar <mkumard@xxxxxxxxxx>
Date: Thu, 11 Aug 2022 10:57:04 +0530
Subject: ALSA: hda: Fix crash due to jack poll in suspend
From: Mohan Kumar <mkumard@xxxxxxxxxx>
commit 636aa8807b5780b76609b40cd3d3e1b5a225471c upstream.
With jackpoll_in_suspend flag set, there is a possibility that
jack poll worker thread will run even after system suspend was
completed. Any register access after system pm callback flow
will result in kernel crash as still jack poll worker thread
tries to access registers.
To fix the crash issue during system flow, cancel the jack poll
worker thread during system pm prepare callback and cancel the
worker thread at start of runtime suspend callback and re-schedule
at last to avoid any unwarranted access of register by worker thread
during suspend flow.
Signed-off-by: Mohan Kumar <mkumard@xxxxxxxxxx>
Fixes: b33115bd05af ("ALSA: hda: Jack detection poll in suspend state")
Link: https://lore.kernel.org/r/20220811052704.2944-1-mkumard@xxxxxxxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/pci/hda/hda_codec.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -2935,8 +2935,7 @@ static int hda_codec_runtime_suspend(str
if (!codec->card)
return 0;
- if (!codec->bus->jackpoll_in_suspend)
- cancel_delayed_work_sync(&codec->jackpoll_work);
+ cancel_delayed_work_sync(&codec->jackpoll_work);
state = hda_call_codec_suspend(codec);
if (codec->link_down_at_suspend ||
@@ -2944,6 +2943,11 @@ static int hda_codec_runtime_suspend(str
(state & AC_PWRST_CLK_STOP_OK)))
snd_hdac_codec_link_down(&codec->core);
snd_hda_codec_display_power(codec, false);
+
+ if (codec->bus->jackpoll_in_suspend &&
+ (dev->power.power_state.event != PM_EVENT_SUSPEND))
+ schedule_delayed_work(&codec->jackpoll_work,
+ codec->jackpoll_interval);
return 0;
}
@@ -2967,6 +2971,9 @@ static int hda_codec_runtime_resume(stru
#ifdef CONFIG_PM_SLEEP
static int hda_codec_pm_prepare(struct device *dev)
{
+ struct hda_codec *codec = dev_to_hda_codec(dev);
+
+ cancel_delayed_work_sync(&codec->jackpoll_work);
dev->power.power_state = PMSG_SUSPEND;
return pm_runtime_suspended(dev);
}
@@ -2986,9 +2993,6 @@ static void hda_codec_pm_complete(struct
static int hda_codec_pm_suspend(struct device *dev)
{
- struct hda_codec *codec = dev_to_hda_codec(dev);
-
- cancel_delayed_work_sync(&codec->jackpoll_work);
dev->power.power_state = PMSG_SUSPEND;
return pm_runtime_force_suspend(dev);
}
Patches currently in stable-queue which might be from mkumard@xxxxxxxxxx are
queue-5.19/alsa-hda-fix-crash-due-to-jack-poll-in-suspend.patch
