[PATCH] ASoC: soc-pcm: ignore un-needed mutex_unlock() case on soc_pcm_open()

[Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>]

From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>

commit 140a4532cdb8c ("ASoC: soc-pcm: add soc_pcm_clean() and call it
from soc_pcm_open/close()") switch to call soc_pcm_clean() on
soc_pcm_open() when rollback case.

But, it uses "goto err" (A) *before* mutex_lock() (B) when error of
snd_soc_pcm_component_pm_runtime_get().
The mutex_unlock() (C) is not needed in such case. This patch fix it.

	static int soc_pcm_open(...)
	{
		...
		ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream);
		if (ret < 0)
(A)			goto err;

(B)		mutex_lock_nested(...);
		...
	err:
(C)		mutex_unlock(..);
		...
	}

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
 sound/soc/soc-pcm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 09e8d703a502..5d538520e2cf 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -706,7 +706,7 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 
 	ret = snd_soc_pcm_component_pm_runtime_get(rtd, substream);
 	if (ret < 0)
-		goto err;
+		goto pm_err;
 
 	mutex_lock_nested(&rtd->card->pcm_mutex, rtd->card->pcm_subclass);
 
@@ -786,7 +786,7 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 	snd_soc_runtime_activate(rtd, substream->stream);
 err:
 	mutex_unlock(&rtd->card->pcm_mutex);
-
+pm_err:
 	if (ret < 0)
 		soc_pcm_clean(substream, 1);
 
-- 
2.25.1