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ASoC: mediatek: mt8186: Fix mutex double unlock in GPIO request 

The lockdep mechanism revealed an unbalanced unlocking on MT8186:

  [    2.993966] WARNING: bad unlock balance detected!
  [    2.993978] -------------------------------------
  [    2.993983] kworker/u16:1/10 is trying to release lock (gpio_request_mutex) at:
  [    2.993994] [<ffffffdcd9adebf8>] mt8186_afe_gpio_request+0xf8/0x210
  [    2.994012] but there are no more locks to release!

The cause is that the mutex will be double unlocked if dai is unknown
during GPIO selection, and this patch fixes it.

Fixes: cfa9a966f1 ("ASoC: mediatek: mt8186: support gpio control in platform driver")

Signed-off-by: Fei Shao <fshao@chromium.org>
Link: https://lore.kernel.org/r/20220617111003.2014395-1-fshao@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Fei Shao 2022-06-17 19:10:04 +08:00 committed by Mark Brown
parent 442302003b
commit 6c9e9046e1
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GPG Key ID: 24D68B725D5487D0
1 changed files with 0 additions and 1 deletions
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1
sound/soc/mediatek/mt8186/mt8186-afe-gpio.c
View File

@ -230,7 +230,6 @@ int mt8186_afe_gpio_request(struct device *dev, bool enable,
sel = enable ? MT8186_AFE_GPIO_PCM_ON : MT8186_AFE_GPIO_PCM_OFF;
break;
default:
mutex_unlock(&gpio_request_mutex);
dev_err(dev, "%s(), invalid dai %d\n", __func__, dai);
goto unlock;
}