[PATCH] ASoC: tegra: Use guard() for mutex locks

[phucduc . bui]

From: bui duc phuc <phucduc.bui@xxxxxxxxx>

Clean up the code using guard() for mutex locks.
Merely code refactoring, and no behavior change.

Signed-off-by: bui duc phuc <phucduc.bui@xxxxxxxxx>
---
 sound/soc/tegra/tegra_isomgr_bw.c | 21 ++++++++++-----------
 1 file changed, 10 insertions(+), 11 deletions(-)

diff --git a/sound/soc/tegra/tegra_isomgr_bw.c b/sound/soc/tegra/tegra_isomgr_bw.c
index fa979960bc09..db33acbf6c67 100644
--- a/sound/soc/tegra/tegra_isomgr_bw.c
+++ b/sound/soc/tegra/tegra_isomgr_bw.c
@@ -55,19 +55,18 @@ int tegra_isomgr_adma_setbw(struct snd_pcm_substream *substream,
 				sample_bytes;
 	}
 
-	mutex_lock(&adma_isomgr->mutex);
-
-	if (is_running) {
-		if (bandwidth + adma_isomgr->current_bandwidth > adma_isomgr->max_bw)
-			bandwidth = adma_isomgr->max_bw - adma_isomgr->current_bandwidth;
-
-		adma_isomgr->current_bandwidth += bandwidth;
-	} else {
-		adma_isomgr->current_bandwidth -= adma_isomgr->bw_per_dev[type][pcm->device];
+	scoped_guard(mutex, &adma_isomgr->mutex) {
+		if (is_running) {
+			if (bandwidth + adma_isomgr->current_bandwidth > adma_isomgr->max_bw)
+				bandwidth = adma_isomgr->max_bw - adma_isomgr->current_bandwidth;
+
+			adma_isomgr->current_bandwidth += bandwidth;
+		} else {
+			adma_isomgr->current_bandwidth -=
+				adma_isomgr->bw_per_dev[type][pcm->device];
+		}
 	}
 
-	mutex_unlock(&adma_isomgr->mutex);
-
 	adma_isomgr->bw_per_dev[type][pcm->device] = bandwidth;
 
 	dev_dbg(dev, "Setting up bandwidth to %d KBps\n", adma_isomgr->current_bandwidth);
-- 
2.43.0