[PATCH 08/26] ASoC: codecs: tscs42xx: 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/tscs42xx.c | 61 ++++++++++++-------------------------
 1 file changed, 19 insertions(+), 42 deletions(-)

diff --git a/sound/soc/codecs/tscs42xx.c b/sound/soc/codecs/tscs42xx.c
index dba581857920..02082ef790b4 100644
--- a/sound/soc/codecs/tscs42xx.c
+++ b/sound/soc/codecs/tscs42xx.c
@@ -12,6 +12,7 @@
 #include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/mutex.h>
+#include <linux/cleanup.h>
 #include <linux/clk.h>
 #include <sound/tlv.h>
 #include <sound/pcm_params.h>
@@ -210,25 +211,21 @@ static int power_up_audio_plls(struct snd_soc_component *component)
 		return ret;
 	}
 
-	mutex_lock(&tscs42xx->pll_lock);
+	guard(mutex)(&tscs42xx->pll_lock);
 
 	ret = snd_soc_component_update_bits(component, R_PLLCTL1C, mask, val);
 	if (ret < 0) {
 		dev_err(component->dev, "Failed to turn PLL on (%d)\n", ret);
-		goto exit;
+		return ret;
 	}
 
 	if (!plls_locked(component)) {
 		dev_err(component->dev, "Failed to lock plls\n");
 		ret = -ENOMSG;
-		goto exit;
+		return ret;
 	}
 
-	ret = 0;
-exit:
-	mutex_unlock(&tscs42xx->pll_lock);
-
-	return ret;
+	return 0;
 }
 
 static int power_down_audio_plls(struct snd_soc_component *component)
@@ -236,28 +233,24 @@ static int power_down_audio_plls(struct snd_soc_component *component)
 	struct tscs42xx *tscs42xx = snd_soc_component_get_drvdata(component);
 	int ret;
 
-	mutex_lock(&tscs42xx->pll_lock);
+	guard(mutex)(&tscs42xx->pll_lock);
 
 	ret = snd_soc_component_update_bits(component, R_PLLCTL1C,
 			RM_PLLCTL1C_PDB_PLL1,
 			RV_PLLCTL1C_PDB_PLL1_DISABLE);
 	if (ret < 0) {
 		dev_err(component->dev, "Failed to turn PLL off (%d)\n", ret);
-		goto exit;
+		return ret;
 	}
 	ret = snd_soc_component_update_bits(component, R_PLLCTL1C,
 			RM_PLLCTL1C_PDB_PLL2,
 			RV_PLLCTL1C_PDB_PLL2_DISABLE);
 	if (ret < 0) {
 		dev_err(component->dev, "Failed to turn PLL off (%d)\n", ret);
-		goto exit;
+		return ret;
 	}
 
-	ret = 0;
-exit:
-	mutex_unlock(&tscs42xx->pll_lock);
-
-	return ret;
+	return 0;
 }
 
 static int coeff_ram_get(struct snd_kcontrol *kcontrol,
@@ -269,13 +262,11 @@ static int coeff_ram_get(struct snd_kcontrol *kcontrol,
 		(struct coeff_ram_ctl *)kcontrol->private_value;
 	struct soc_bytes_ext *params = &ctl->bytes_ext;
 
-	mutex_lock(&tscs42xx->coeff_ram_lock);
+	guard(mutex)(&tscs42xx->coeff_ram_lock);
 
 	memcpy(ucontrol->value.bytes.data,
 		&tscs42xx->coeff_ram[ctl->addr * COEFF_SIZE], params->max);
 
-	mutex_unlock(&tscs42xx->coeff_ram_lock);
-
 	return 0;
 }
 
@@ -290,14 +281,14 @@ static int coeff_ram_put(struct snd_kcontrol *kcontrol,
 	unsigned int coeff_cnt = params->max / COEFF_SIZE;
 	int ret;
 
-	mutex_lock(&tscs42xx->coeff_ram_lock);
+	guard(mutex)(&tscs42xx->coeff_ram_lock);
 
 	tscs42xx->coeff_ram_synced = false;
 
 	memcpy(&tscs42xx->coeff_ram[ctl->addr * COEFF_SIZE],
 		ucontrol->value.bytes.data, params->max);
 
-	mutex_lock(&tscs42xx->pll_lock);
+	guard(mutex)(&tscs42xx->pll_lock);
 
 	if (plls_locked(component)) {
 		ret = write_coeff_ram(component, tscs42xx->coeff_ram,
@@ -305,18 +296,12 @@ static int coeff_ram_put(struct snd_kcontrol *kcontrol,
 		if (ret < 0) {
 			dev_err(component->dev,
 				"Failed to flush coeff ram cache (%d)\n", ret);
-			goto exit;
+			return ret;
 		}
 		tscs42xx->coeff_ram_synced = true;
 	}
 
-	ret = 0;
-exit:
-	mutex_unlock(&tscs42xx->pll_lock);
-
-	mutex_unlock(&tscs42xx->coeff_ram_lock);
-
-	return ret;
+	return 0;
 }
 
 /* Input L Capture Route */
@@ -385,21 +370,17 @@ static int dac_event(struct snd_soc_dapm_widget *w,
 	struct tscs42xx *tscs42xx = snd_soc_component_get_drvdata(component);
 	int ret;
 
-	mutex_lock(&tscs42xx->coeff_ram_lock);
+	guard(mutex)(&tscs42xx->coeff_ram_lock);
 
 	if (!tscs42xx->coeff_ram_synced) {
 		ret = write_coeff_ram(component, tscs42xx->coeff_ram, 0x00,
 			COEFF_RAM_COEFF_COUNT);
 		if (ret < 0)
-			goto exit;
+			return ret;
 		tscs42xx->coeff_ram_synced = true;
 	}
 
-	ret = 0;
-exit:
-	mutex_unlock(&tscs42xx->coeff_ram_lock);
-
-	return ret;
+	return 0;
 }
 
 static const struct snd_soc_dapm_widget tscs42xx_dapm_widgets[] = {
@@ -926,12 +907,10 @@ static int setup_sample_rate(struct snd_soc_component *component,
 		return ret;
 	}
 
-	mutex_lock(&tscs42xx->audio_params_lock);
+	guard(mutex)(&tscs42xx->audio_params_lock);
 
 	tscs42xx->samplerate = rate;
 
-	mutex_unlock(&tscs42xx->audio_params_lock);
-
 	return 0;
 }
 
@@ -1253,12 +1232,10 @@ static int tscs42xx_set_dai_bclk_ratio(struct snd_soc_dai *codec_dai,
 		return ret;
 	}
 
-	mutex_lock(&tscs42xx->audio_params_lock);
+	guard(mutex)(&tscs42xx->audio_params_lock);
 
 	tscs42xx->bclk_ratio = ratio;
 
-	mutex_unlock(&tscs42xx->audio_params_lock);
-
 	return 0;
 }
 
-- 
2.43.0