[PATCH v2 19/26] ASoC: codecs: wm8731: 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.

Reviewed-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
---

Changes in v2:
 - Add Reviewed-by tag from Richard Fitzgerald.

 sound/soc/codecs/wm8731.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/sound/soc/codecs/wm8731.c b/sound/soc/codecs/wm8731.c
index a2f0e2f5c407..ce87280d590d 100644
--- a/sound/soc/codecs/wm8731.c
+++ b/sound/soc/codecs/wm8731.c
@@ -10,6 +10,7 @@
  * Based on wm8753.c by Liam Girdwood
  */
 
+#include <linux/cleanup.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/init.h>
@@ -110,22 +111,20 @@ static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
 	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 	struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component);
 	unsigned int deemph = ucontrol->value.integer.value[0];
-	int ret = 0;
 
 	if (deemph > 1)
 		return -EINVAL;
 
-	mutex_lock(&wm8731->lock);
+	guard(mutex)(&wm8731->lock);
 	if (wm8731->deemph != deemph) {
 		wm8731->deemph = deemph;
 
 		wm8731_set_deemph(component);
 
-		ret = 1;
+		return 1;
 	}
-	mutex_unlock(&wm8731->lock);
 
-	return ret;
+	return 0;
 }
 
 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0);
-- 
2.43.0