[PATCH v2 20/26] ASoC: codecs: wm8903: Use guard() for mutex locks

From: bui duc phuc <[email protected]>

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

Reviewed-by: Richard Fitzgerald <[email protected]>
Signed-off-by: bui duc phuc <[email protected]>
---

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

 sound/soc/codecs/wm8903.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c
index 320d7737699d..156e1e24a388 100644
--- a/sound/soc/codecs/wm8903.c
+++ b/sound/soc/codecs/wm8903.c
@@ -14,6 +14,7 @@
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/init.h>
+#include <linux/cleanup.h>
 #include <linux/completion.h>
 #include <linux/delay.h>
 #include <linux/gpio/driver.h>
@@ -458,22 +459,20 @@ static int wm8903_put_deemph(struct snd_kcontrol *kcontrol,
 	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 	struct wm8903_priv *wm8903 = snd_soc_component_get_drvdata(component);
 	unsigned int deemph = ucontrol->value.integer.value[0];
-	int ret = 0;
 
 	if (deemph > 1)
 		return -EINVAL;
 
-	mutex_lock(&wm8903->lock);
+	guard(mutex)(&wm8903->lock);
 	if (wm8903->deemph != deemph) {
 		wm8903->deemph = deemph;
 
 		wm8903_set_deemph(component);
 
-		ret = 1;
+		return 1;
 	}
-	mutex_unlock(&wm8903->lock);
 
-	return ret;
+	return 0;
 }
 
 /* ALSA can only do steps of .01dB */
-- 
2.43.0