[PATCH 65/78] ASoC: codecs: wcd937x: 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/wcd937x.c | 24 +++++++++---------------
 1 file changed, 9 insertions(+), 15 deletions(-)

diff --git a/sound/soc/codecs/wcd937x.c b/sound/soc/codecs/wcd937x.c
index e0169e783ee9..8336316866ea 100644
--- a/sound/soc/codecs/wcd937x.c
+++ b/sound/soc/codecs/wcd937x.c
@@ -1056,7 +1056,7 @@ static int wcd937x_micbias_control(struct snd_soc_component *component,
 		return -EINVAL;
 	}
 
-	mutex_lock(&wcd937x->micb_lock);
+	guard(mutex)(&wcd937x->micb_lock);
 	switch (req) {
 	case MICB_PULLUP_ENABLE:
 		wcd937x->pullup_ref[micb_index]++;
@@ -1136,7 +1136,6 @@ static int wcd937x_micbias_control(struct snd_soc_component *component,
 		}
 		break;
 	}
-	mutex_unlock(&wcd937x->micb_lock);
 
 	return 0;
 }
@@ -1460,7 +1459,7 @@ static int wcd937x_mbhc_micb_adjust_voltage(struct snd_soc_component *component,
 					    int req_volt, int micb_num)
 {
 	struct wcd937x_priv *wcd937x = snd_soc_component_get_drvdata(component);
-	int cur_vout_ctl, req_vout_ctl, micb_reg, micb_en, ret = 0;
+	int cur_vout_ctl, req_vout_ctl, micb_reg, micb_en;
 
 	switch (micb_num) {
 	case MIC_BIAS_1:
@@ -1475,7 +1474,7 @@ static int wcd937x_mbhc_micb_adjust_voltage(struct snd_soc_component *component,
 	default:
 		return -EINVAL;
 	}
-	mutex_lock(&wcd937x->micb_lock);
+	guard(mutex)(&wcd937x->micb_lock);
 	/*
 	 * If requested micbias voltage is same as current micbias
 	 * voltage, then just return. Otherwise, adjust voltage as
@@ -1490,15 +1489,11 @@ static int wcd937x_mbhc_micb_adjust_voltage(struct snd_soc_component *component,
 						    WCD937X_MICB_VOUT_MASK);
 
 	req_vout_ctl = wcd_get_micb_vout_ctl_val(component->dev, req_volt);
-	if (req_vout_ctl < 0) {
-		ret = -EINVAL;
-		goto exit;
-	}
+	if (req_vout_ctl < 0)
+		return -EINVAL;
 
-	if (cur_vout_ctl == req_vout_ctl) {
-		ret = 0;
-		goto exit;
-	}
+	if (cur_vout_ctl == req_vout_ctl)
+		return 0;
 
 	if (micb_en == WCD937X_MICB_ENABLE)
 		snd_soc_component_write_field(component, micb_reg,
@@ -1519,9 +1514,8 @@ static int wcd937x_mbhc_micb_adjust_voltage(struct snd_soc_component *component,
 		 */
 		usleep_range(2000, 2100);
 	}
-exit:
-	mutex_unlock(&wcd937x->micb_lock);
-	return ret;
+
+	return 0;
 }
 
 static int wcd937x_mbhc_micb_ctrl_threshold_mic(struct snd_soc_component *component,
-- 
2.43.0