[PATCH v3 02/26] ASoC: codecs: sta350: Use guard() for mutex locks

[phucduc.bui@gmail.com]

From: bui duc phuc <phucduc.bui@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@gmail.com>
---
 sound/soc/codecs/sta350.c | 20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/sound/soc/codecs/sta350.c b/sound/soc/codecs/sta350.c
index 99c7f7ac807b..2ba35076732b 100644
--- a/sound/soc/codecs/sta350.c
+++ b/sound/soc/codecs/sta350.c
@@ -16,6 +16,7 @@
 
 #define pr_fmt(fmt) KBUILD_MODNAME ":%s:%d: " fmt, __func__, __LINE__
 
+#include <linux/cleanup.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/init.h>
@@ -306,9 +307,9 @@ 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);
@@ -320,24 +321,19 @@ static int sta350_coefficient_get(struct snd_kcontrol *kcontrol,
 	regmap_write(sta350->regmap, STA350_CFUD, cfud);
 
 	regmap_write(sta350->regmap, STA350_CFADDR2, index);
-	if (numcoef == 1) {
+	if (numcoef == 1)
 		regmap_write(sta350->regmap, STA350_CFUD, cfud | 0x04);
-	} else if (numcoef == 5) {
+	else if (numcoef == 5)
 		regmap_write(sta350->regmap, STA350_CFUD, cfud | 0x08);
-	} else {
-		ret = -EINVAL;
-		goto exit_unlock;
-	}
+	else
+		return -EINVAL;
 
 	for (i = 0; i < 3 * numcoef; i++) {
 		regmap_read(sta350->regmap, STA350_B1CF1 + i, &val);
 		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