[PATCH v4 08/29] ASoC: codecs: hdmi-codec: 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/hdmi-codec.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c
index 13ae9e83bc21..bc2c22436ba6 100644
--- a/sound/soc/codecs/hdmi-codec.c
+++ b/sound/soc/codecs/hdmi-codec.c
@@ -4,6 +4,7 @@
  * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
  * Author: Jyri Sarha <jsarha@ti.com>
  */
+#include <linux/cleanup.h>
 #include <linux/module.h>
 #include <linux/string.h>
 #include <sound/core.h>
@@ -452,31 +453,30 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 	if (!((has_playback && tx) || (has_capture && !tx)))
 		return 0;
 
-	mutex_lock(&hcp->lock);
+	guard(mutex)(&hcp->lock);
 	if (hcp->busy) {
 		dev_err(dai->dev, "Only one simultaneous stream supported!\n");
-		mutex_unlock(&hcp->lock);
 		return -EINVAL;
 	}
 
 	if (hcp->hcd.ops->audio_startup) {
 		ret = hcp->hcd.ops->audio_startup(dai->dev->parent, hcp->hcd.data);
 		if (ret)
-			goto err;
+			return ret;
 	}
 
 	if (tx && hcp->hcd.ops->get_eld) {
 		ret = hcp->hcd.ops->get_eld(dai->dev->parent, hcp->hcd.data,
 					    hcp->eld, sizeof(hcp->eld));
 		if (ret)
-			goto err;
+			return ret;
 
 		snd_parse_eld(dai->dev, &hcp->eld_parsed,
 			      hcp->eld, sizeof(hcp->eld));
 
 		ret = snd_pcm_hw_constraint_eld(substream->runtime, hcp->eld);
 		if (ret)
-			goto err;
+			return ret;
 
 		/* Select chmap supported */
 		hdmi_codec_eld_chmap(hcp);
@@ -484,8 +484,6 @@ static int hdmi_codec_startup(struct snd_pcm_substream *substream,
 
 	hcp->busy = true;
 
-err:
-	mutex_unlock(&hcp->lock);
 	return ret;
 }
 
@@ -503,9 +501,8 @@ static void hdmi_codec_shutdown(struct snd_pcm_substream *substream,
 	hcp->chmap_idx = HDMI_CODEC_CHMAP_IDX_UNKNOWN;
 	hcp->hcd.ops->audio_shutdown(dai->dev->parent, hcp->hcd.data);
 
-	mutex_lock(&hcp->lock);
+	guard(mutex)(&hcp->lock);
 	hcp->busy = false;
-	mutex_unlock(&hcp->lock);
 }
 
 static int hdmi_codec_fill_codec_params(struct snd_soc_dai *dai,
-- 
2.43.0