[PATCH 5.4 210/267] ASoC: rt5645: Fix deadlock in rt5645_jack_detect_work()

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5.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>

[ Upstream commit 6ef5d5b92f7117b324efaac72b3db27ae8bb3082 ]

There is a path in rt5645_jack_detect_work(), where rt5645->jd_mutex
is left locked forever. That may lead to deadlock
when rt5645_jack_detect_work() is called for the second time.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Fixes: cdba4301adda ("ASoC: rt5650: add mutex to avoid the jack detection failure")
Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
Link: https://lore.kernel.org/r/1707645514-21196-1-git-send-email-khoroshilov@xxxxxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 sound/soc/codecs/rt5645.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/codecs/rt5645.c b/sound/soc/codecs/rt5645.c
index c9512e97c12e..88093e58dd84 100644
--- a/sound/soc/codecs/rt5645.c
+++ b/sound/soc/codecs/rt5645.c
@@ -3276,6 +3276,7 @@ static void rt5645_jack_detect_work(struct work_struct *work)
 				    report, SND_JACK_HEADPHONE);
 		snd_soc_jack_report(rt5645->mic_jack,
 				    report, SND_JACK_MICROPHONE);
+		mutex_unlock(&rt5645->jd_mutex);
 		return;
 	case 4:
 		val = snd_soc_component_read32(rt5645->component, RT5645_A_JD_CTRL1) & 0x0020;
-- 
2.43.0







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