[PATCH v3 12/26] ASoC: codecs: wcd934x: 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/wcd934x.c | 42 ++++++++++++++------------------------
 1 file changed, 15 insertions(+), 27 deletions(-)

diff --git a/sound/soc/codecs/wcd934x.c b/sound/soc/codecs/wcd934x.c
index bc41a1466c70..11108c37648f 100644
--- a/sound/soc/codecs/wcd934x.c
+++ b/sound/soc/codecs/wcd934x.c
@@ -1265,13 +1265,10 @@ static int wcd934x_set_sido_input_src(struct wcd934x_codec *wcd, int sido_src)
 
 static int wcd934x_enable_ana_bias_and_sysclk(struct wcd934x_codec *wcd)
 {
-	mutex_lock(&wcd->sysclk_mutex);
-
-	if (++wcd->sysclk_users != 1) {
-		mutex_unlock(&wcd->sysclk_mutex);
-		return 0;
+	scoped_guard(mutex, &wcd->sysclk_mutex) {
+		if (++wcd->sysclk_users != 1)
+			return 0;
 	}
-	mutex_unlock(&wcd->sysclk_mutex);
 
 	regmap_update_bits(wcd->regmap, WCD934X_ANA_BIAS,
 			   WCD934X_ANA_BIAS_EN_MASK,
@@ -1328,12 +1325,10 @@ static int wcd934x_enable_ana_bias_and_sysclk(struct wcd934x_codec *wcd)
 
 static int wcd934x_disable_ana_bias_and_syclk(struct wcd934x_codec *wcd)
 {
-	mutex_lock(&wcd->sysclk_mutex);
-	if (--wcd->sysclk_users != 0) {
-		mutex_unlock(&wcd->sysclk_mutex);
-		return 0;
+	scoped_guard(mutex, &wcd->sysclk_mutex) {
+		if (--wcd->sysclk_users != 0)
+			return 0;
 	}
-	mutex_unlock(&wcd->sysclk_mutex);
 
 	regmap_update_bits(wcd->regmap, WCD934X_CLK_SYS_MCLK_PRG,
 			   WCD934X_EXT_CLK_BUF_EN_MASK |
@@ -2384,7 +2379,7 @@ static int wcd934x_micbias_control(struct snd_soc_component *component,
 			__func__, micb_num);
 		return -EINVAL;
 	}
-	mutex_lock(&wcd934x->micb_lock);
+	guard(mutex)(&wcd934x->micb_lock);
 
 	switch (req) {
 	case MICB_PULLUP_ENABLE:
@@ -2446,8 +2441,6 @@ static int wcd934x_micbias_control(struct snd_soc_component *component,
 		break;
 	}
 
-	mutex_unlock(&wcd934x->micb_lock);
-
 	return 0;
 }
 
@@ -2488,7 +2481,7 @@ static int wcd934x_mbhc_micb_adjust_voltage(struct snd_soc_component *component,
 					    int req_volt, int micb_num)
 {
 	struct wcd934x_codec *wcd934x = 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:
@@ -2506,7 +2499,7 @@ static int wcd934x_mbhc_micb_adjust_voltage(struct snd_soc_component *component,
 	default:
 		return -EINVAL;
 	}
-	mutex_lock(&wcd934x->micb_lock);
+	guard(mutex)(&wcd934x->micb_lock);
 	/*
 	 * If requested micbias voltage is same as current micbias
 	 * voltage, then just return. Otherwise, adjust voltage as
@@ -2521,15 +2514,11 @@ static int wcd934x_mbhc_micb_adjust_voltage(struct snd_soc_component *component,
 						    WCD934X_MICB_VAL_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 == WCD934X_MICB_ENABLE)
 		snd_soc_component_write_field(component, micb_reg,
@@ -2550,9 +2539,8 @@ static int wcd934x_mbhc_micb_adjust_voltage(struct snd_soc_component *component,
 		 */
 		usleep_range(2000, 2100);
 	}
-exit:
-	mutex_unlock(&wcd934x->micb_lock);
-	return ret;
+
+	return 0;
 }
 
 static int wcd934x_mbhc_micb_ctrl_threshold_mic(struct snd_soc_component *component,
-- 
2.43.0