[alsa-devel] Applied "ASoC: max98090: fix deadlock in max98090_dapm_put_enum_double()" to the asoc tree

[Mark Brown]

The patch

   ASoC: max98090: fix deadlock in max98090_dapm_put_enum_double()

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.6

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 294b7380ffe88d4a0626af1fee5843a3db0c913c Mon Sep 17 00:00:00 2001
From: Tzung-Bi Shih <tzungbi at google.com>
Date: Fri, 17 Jan 2020 15:38:14 +0800
Subject: [PATCH] ASoC: max98090: fix deadlock in
 max98090_dapm_put_enum_double()

Commit 62d5ae4cafb7 ("ASoC: max98090: save and restore SHDN when
changing sensitive registers SHDN bit") uses dapm_mutex to protect SHDN
bit.  However, snd_soc_dapm_put_enum_double() in
max98090_dapm_put_enum_double() acquires the dapm_mutex again which
cause a deadlock.

Use snd_soc_dapm_put_enum_double_locked() instead to fix the deadlock.

Fixes: 62d5ae4cafb7 ("ASoC: max98090: save and restore SHDN when changing sensitive registers SHDN bit")
Signed-off-by: Tzung-Bi Shih <tzungbi at google.com>
Link: https://lore.kernel.org/r/20200117073814.82441-4-tzungbi@google.com
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/codecs/max98090.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/max98090.c b/sound/soc/codecs/max98090.c
index c01ce4a3f86d..0313e1183167 100644
--- a/sound/soc/codecs/max98090.c
+++ b/sound/soc/codecs/max98090.c
@@ -88,7 +88,7 @@ static int max98090_dapm_put_enum_double(struct snd_kcontrol *kcontrol,
 	int ret;
 
 	max98090_shdn_save(max98090);
-	ret = snd_soc_dapm_put_enum_double(kcontrol, ucontrol);
+	ret = snd_soc_dapm_put_enum_double_locked(kcontrol, ucontrol);
 	max98090_shdn_restore(max98090);
 
 	return ret;
-- 
2.20.1