[PATCH v3 06/26] ASoC: codecs: tas5805m: 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.

Signed-off-by: bui duc phuc <[email protected]>
---
 sound/soc/codecs/tas5805m.c | 21 ++++++++-------------
 1 file changed, 8 insertions(+), 13 deletions(-)

diff --git a/sound/soc/codecs/tas5805m.c b/sound/soc/codecs/tas5805m.c
index bcc8cab8d667..f76e04b403b5 100644
--- a/sound/soc/codecs/tas5805m.c
+++ b/sound/soc/codecs/tas5805m.c
@@ -12,6 +12,7 @@
 //
 // It has been simplified a little and reworked for the 5.x ALSA SoC API.
 
+#include <linux/cleanup.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/kernel.h>
@@ -230,10 +231,9 @@ static int tas5805m_vol_get(struct snd_kcontrol *kcontrol,
 	struct tas5805m_priv *tas5805m =
 		snd_soc_component_get_drvdata(component);
 
-	mutex_lock(&tas5805m->lock);
+	guard(mutex)(&tas5805m->lock);
 	ucontrol->value.integer.value[0] = tas5805m->vol[0];
 	ucontrol->value.integer.value[1] = tas5805m->vol[1];
-	mutex_unlock(&tas5805m->lock);
 
 	return 0;
 }
@@ -249,13 +249,12 @@ static int tas5805m_vol_put(struct snd_kcontrol *kcontrol,
 	struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
 	struct tas5805m_priv *tas5805m =
 		snd_soc_component_get_drvdata(component);
-	int ret = 0;
 
 	if (!(volume_is_valid(ucontrol->value.integer.value[0]) &&
 	      volume_is_valid(ucontrol->value.integer.value[1])))
 		return -EINVAL;
 
-	mutex_lock(&tas5805m->lock);
+	guard(mutex)(&tas5805m->lock);
 	if (tas5805m->vol[0] != ucontrol->value.integer.value[0] ||
 	    tas5805m->vol[1] != ucontrol->value.integer.value[1]) {
 		tas5805m->vol[0] = ucontrol->value.integer.value[0];
@@ -265,11 +264,10 @@ static int tas5805m_vol_put(struct snd_kcontrol *kcontrol,
 			tas5805m->is_powered);
 		if (tas5805m->is_powered)
 			tas5805m_refresh(tas5805m);
-		ret = 1;
+		return 1;
 	}
-	mutex_unlock(&tas5805m->lock);
 
-	return ret;
+	return 0;
 }
 
 static const struct snd_kcontrol_new tas5805m_snd_controls[] = {
@@ -332,7 +330,7 @@ static void do_work(struct work_struct *work)
 
 	dev_dbg(&tas5805m->i2c->dev, "DSP startup\n");
 
-	mutex_lock(&tas5805m->lock);
+	guard(mutex)(&tas5805m->lock);
 	/* We mustn't issue any I2C transactions until the I2S
 	 * clock is stable. Furthermore, we must allow a 5ms
 	 * delay after the first set of register writes to
@@ -345,7 +343,6 @@ static void do_work(struct work_struct *work)
 
 	tas5805m->is_powered = true;
 	tas5805m_refresh(tas5805m);
-	mutex_unlock(&tas5805m->lock);
 }
 
 static int tas5805m_dac_event(struct snd_soc_dapm_widget *w,
@@ -362,7 +359,7 @@ static int tas5805m_dac_event(struct snd_soc_dapm_widget *w,
 		dev_dbg(component->dev, "DSP shutdown\n");
 		cancel_work_sync(&tas5805m->work);
 
-		mutex_lock(&tas5805m->lock);
+		guard(mutex)(&tas5805m->lock);
 		if (tas5805m->is_powered) {
 			tas5805m->is_powered = false;
 
@@ -379,7 +376,6 @@ static int tas5805m_dac_event(struct snd_soc_dapm_widget *w,
 
 			regmap_write(rm, REG_DEVICE_CTRL_2, DCTRL2_MODE_HIZ);
 		}
-		mutex_unlock(&tas5805m->lock);
 	}
 
 	return 0;
@@ -414,14 +410,13 @@ static int tas5805m_mute(struct snd_soc_dai *dai, int mute, int direction)
 	struct tas5805m_priv *tas5805m =
 		snd_soc_component_get_drvdata(component);
 
-	mutex_lock(&tas5805m->lock);
+	guard(mutex)(&tas5805m->lock);
 	dev_dbg(component->dev, "set mute=%d (is_powered=%d)\n",
 		mute, tas5805m->is_powered);
 
 	tas5805m->is_muted = mute;
 	if (tas5805m->is_powered)
 		tas5805m_refresh(tas5805m);
-	mutex_unlock(&tas5805m->lock);
 
 	return 0;
 }
-- 
2.43.0