[PATCH 02/24] ASoC: codecs: ak4613: 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/ak4613.c | 83 +++++++++++++++++++--------------------
 1 file changed, 40 insertions(+), 43 deletions(-)

diff --git a/sound/soc/codecs/ak4613.c b/sound/soc/codecs/ak4613.c
index 3e0696b5abf5..be5306d07d40 100644
--- a/sound/soc/codecs/ak4613.c
+++ b/sound/soc/codecs/ak4613.c
@@ -95,6 +95,7 @@
  * see
  *	AK4613_ENABLE_TDM_TEST
  */
+#include <linux/cleanup.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/i2c.h>
@@ -384,7 +385,7 @@ static void ak4613_dai_shutdown(struct snd_pcm_substream *substream,
 	struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
 	struct device *dev = component->dev;
 
-	mutex_lock(&priv->lock);
+	guard(mutex)(&priv->lock);
 	priv->cnt--;
 	if (priv->cnt < 0) {
 		dev_err(dev, "unexpected counter error\n");
@@ -392,7 +393,6 @@ static void ak4613_dai_shutdown(struct snd_pcm_substream *substream,
 	}
 	if (!priv->cnt)
 		priv->ctrl1 = 0;
-	mutex_unlock(&priv->lock);
 }
 
 static void ak4613_hw_constraints(struct ak4613_priv *priv,
@@ -507,10 +507,9 @@ static int ak4613_dai_startup(struct snd_pcm_substream *substream,
 	struct snd_soc_component *component = dai->component;
 	struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
 
-	mutex_lock(&priv->lock);
+	guard(mutex)(&priv->lock);
 	ak4613_hw_constraints(priv, substream);
 	priv->cnt++;
-	mutex_unlock(&priv->lock);
 
 	return 0;
 }
@@ -599,45 +598,47 @@ static int ak4613_dai_hw_params(struct snd_pcm_substream *substream,
 	 */
 	ret = -EINVAL;
 
-	mutex_lock(&priv->lock);
-	if (priv->cnt > 1) {
-		/*
-		 * If it was already working, use current priv->ctrl1
-		 */
-		ret = 0;
-	} else {
-		/*
-		 * It is not yet working,
-		 */
-		unsigned int channel = params_channels(params);
-		u8 tdm;
-
-		/* STEREO or TDM */
-		if (channel == 2)
-			tdm = AK4613_CONFIG_MODE_STEREO;
-		else
-			tdm = AK4613_CONFIG_GET(priv, MODE);
-
-		for (i = ARRAY_SIZE(ak4613_iface) - 1; i >= 0; i--) {
-			const struct ak4613_interface *iface = ak4613_iface + i;
-
-			if ((iface->fmt == fmt) && (iface->width == width)) {
-				/*
-				 * Ctrl1
-				 * | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0  |
-				 * |TDM1|TDM0|DIF2|DIF1|DIF0|ATS1|ATS0|SMUTE|
-				 *  <  tdm  > < iface->dif >
-				 */
-				priv->ctrl1 = (tdm << 6) | (iface->dif << 3);
-				ret = 0;
-				break;
+	scoped_guard(mutex, &priv->lock) {
+		if (priv->cnt > 1) {
+			/*
+			 * If it was already working, use current priv->ctrl1
+			 */
+			ret = 0;
+		} else {
+			/*
+			 * It is not yet working,
+			 */
+			unsigned int channel = params_channels(params);
+			u8 tdm;
+
+			/* STEREO or TDM */
+			if (channel == 2)
+				tdm = AK4613_CONFIG_MODE_STEREO;
+			else
+				tdm = AK4613_CONFIG_GET(priv, MODE);
+
+			for (i = ARRAY_SIZE(ak4613_iface) - 1; i >= 0; i--) {
+				const struct ak4613_interface *iface = ak4613_iface + i;
+
+				if (iface->fmt == fmt && iface->width == width) {
+					/*
+					 * Ctrl1
+					 * | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0  |
+					 * |TDM1|TDM0|DIF2|DIF1|DIF0|ATS1|ATS0|SMUTE|
+					 *  <  tdm  > < iface->dif >
+					 */
+					priv->ctrl1 = (tdm << 6) | (iface->dif << 3);
+					ret = 0;
+					break;
+				}
 			}
 		}
 	}
-	mutex_unlock(&priv->lock);
 
-	if (ret < 0)
-		goto hw_params_end;
+	if (ret < 0) {
+		dev_warn(dev, "unsupported data width/format combination\n");
+		return ret;
+	}
 
 	snd_soc_component_update_bits(component, CTRL1, FMT_MASK, priv->ctrl1);
 	snd_soc_component_update_bits(component, CTRL2, DFS_MASK, ctrl2);
@@ -645,10 +646,6 @@ static int ak4613_dai_hw_params(struct snd_pcm_substream *substream,
 	snd_soc_component_update_bits(component, ICTRL, ICTRL_MASK, priv->ic);
 	snd_soc_component_update_bits(component, OCTRL, OCTRL_MASK, priv->oc);
 
-hw_params_end:
-	if (ret < 0)
-		dev_warn(dev, "unsupported data width/format combination\n");
-
 	return ret;
 }
 
-- 
2.43.0