[PATCH 53/78] ASoC: codecs: sta350: Use guard() for mutex locks

[phucduc.bui at gmail.com]

From: bui duc phuc <phucduc.bui at gmail.com>

Clean up the code using guard() for mutex locks.
Merely code refactoring, and no behavior change.

Signed-off-by: bui duc phuc <phucduc.bui at gmail.com>
---
 sound/soc/codecs/sta350.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/sound/soc/codecs/sta350.c b/sound/soc/codecs/sta350.c
index 99c7f7ac807b..b1e2f346c647 100644
--- a/sound/soc/codecs/sta350.c
+++ b/sound/soc/codecs/sta350.c
@@ -306,9 +306,9 @@ static int sta350_coefficient_get(struct snd_kcontrol *kcontrol,
 	int numcoef = kcontrol->private_value >> 16;
 	int index = kcontrol->private_value & 0xffff;
 	unsigned int cfud, val;
-	int i, ret = 0;
+	int i;
 
-	mutex_lock(&sta350->coeff_lock);
+	guard(mutex)(&sta350->coeff_lock);
 
 	/* preserve reserved bits in STA350_CFUD */
 	regmap_read(sta350->regmap, STA350_CFUD, &cfud);
@@ -325,8 +325,7 @@ static int sta350_coefficient_get(struct snd_kcontrol *kcontrol,
 	} else if (numcoef == 5) {
 		regmap_write(sta350->regmap, STA350_CFUD, cfud | 0x08);
 	} else {
-		ret = -EINVAL;
-		goto exit_unlock;
+		return -EINVAL;
 	}
 
 	for (i = 0; i < 3 * numcoef; i++) {
@@ -334,10 +333,7 @@ static int sta350_coefficient_get(struct snd_kcontrol *kcontrol,
 		ucontrol->value.bytes.data[i] = val;
 	}
 
-exit_unlock:
-	mutex_unlock(&sta350->coeff_lock);
-
-	return ret;
+	return 0;
 }
 
 static int sta350_coefficient_put(struct snd_kcontrol *kcontrol,
-- 
2.43.0