[PATCH v3 15/26] ASoC: codecs: wcd939x: 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/wcd939x.c | 20 +++++++-------------
 1 file changed, 7 insertions(+), 13 deletions(-)

diff --git a/sound/soc/codecs/wcd939x.c b/sound/soc/codecs/wcd939x.c
index 010d12466722..26fe0b6313cd 100644
--- a/sound/soc/codecs/wcd939x.c
+++ b/sound/soc/codecs/wcd939x.c
@@ -8,6 +8,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
+#include <linux/cleanup.h>
 #include <linux/device.h>
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
@@ -1923,7 +1924,6 @@ static int wcd939x_mbhc_micb_adjust_voltage(struct snd_soc_component *component,
 	struct wcd939x_priv *wcd939x = snd_soc_component_get_drvdata(component);
 	unsigned int micb_reg, cur_vout_ctl, micb_en;
 	int req_vout_ctl;
-	int ret = 0;
 
 	switch (micb_num) {
 	case MIC_BIAS_1:
@@ -1941,7 +1941,7 @@ static int wcd939x_mbhc_micb_adjust_voltage(struct snd_soc_component *component,
 	default:
 		return -EINVAL;
 	}
-	mutex_lock(&wcd939x->micb_lock);
+	guard(mutex)(&wcd939x->micb_lock);
 
 	/*
 	 * If requested micbias voltage is same as current micbias
@@ -1957,15 +1957,11 @@ static int wcd939x_mbhc_micb_adjust_voltage(struct snd_soc_component *component,
 						    WCD939X_MICB_VOUT_CTL);
 
 	req_vout_ctl = wcd_get_micb_vout_ctl_val(component->dev, req_volt);
-	if (req_vout_ctl < 0) {
-		ret = req_vout_ctl;
-		goto exit;
-	}
+	if (req_vout_ctl < 0)
+		return req_vout_ctl;
 
-	if (cur_vout_ctl == req_vout_ctl) {
-		ret = 0;
-		goto exit;
-	}
+	if (cur_vout_ctl == req_vout_ctl)
+		return 0;
 
 	dev_dbg(component->dev, "%s: micb_num: %d, cur_mv: %d, req_mv: %d, micb_en: %d\n",
 		__func__, micb_num, WCD_VOUT_CTL_TO_MICB(cur_vout_ctl),
@@ -1990,9 +1986,7 @@ static int wcd939x_mbhc_micb_adjust_voltage(struct snd_soc_component *component,
 		usleep_range(2000, 2100);
 	}
 
-exit:
-	mutex_unlock(&wcd939x->micb_lock);
-	return ret;
+	return 0;
 }
 
 static int wcd939x_mbhc_micb_ctrl_threshold_mic(struct snd_soc_component *component,
-- 
2.43.0