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

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

[phucduc.bui]

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/apple/mca.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/sound/soc/apple/mca.c b/sound/soc/apple/mca.c
index 39269cc7def6..492165c0e1ea 100644
--- a/sound/soc/apple/mca.c
+++ b/sound/soc/apple/mca.c
@@ -307,7 +307,7 @@ static bool mca_fe_clocks_in_use(struct mca_cluster *cl)
 	struct mca_cluster *be_cl;
 	int stream, i;
 
-	mutex_lock(&mca->port_mutex);
+	guard(mutex)(&mca->port_mutex);
 	for (i = 0; i < mca->nclusters; i++) {
 		be_cl = &mca->clusters[i];
 
@@ -316,12 +316,10 @@ static bool mca_fe_clocks_in_use(struct mca_cluster *cl)
 
 		for_each_pcm_streams(stream) {
 			if (be_cl->clocks_in_use[stream]) {
-				mutex_unlock(&mca->port_mutex);
 				return true;
 			}
 		}
 	}
-	mutex_unlock(&mca->port_mutex);
 	return false;
 }
 
@@ -765,9 +763,8 @@ static int mca_be_startup(struct snd_pcm_substream *substream,
 		       cl->base + REG_PORT_CLOCK_SEL);
 	writel_relaxed(PORT_DATA_SEL_TXA(fe_cl->no),
 		       cl->base + REG_PORT_DATA_SEL);
-	mutex_lock(&mca->port_mutex);
-	cl->port_driver = fe_cl->no;
-	mutex_unlock(&mca->port_mutex);
+	scoped_guard(mutex, &mca->port_mutex)
+		cl->port_driver = fe_cl->no;
 	cl->port_started[substream->stream] = true;
 
 	return 0;
@@ -788,9 +785,8 @@ static void mca_be_shutdown(struct snd_pcm_substream *substream,
 		 */
 		writel_relaxed(0, cl->base + REG_PORT_ENABLES);
 		writel_relaxed(0, cl->base + REG_PORT_DATA_SEL);
-		mutex_lock(&mca->port_mutex);
-		cl->port_driver = -1;
-		mutex_unlock(&mca->port_mutex);
+		scoped_guard(mutex, &mca->port_mutex)
+			cl->port_driver = -1;
 	}
 }
 
-- 
2.43.0

Re: [PATCH] ASoC: apple: mca: Use guard() for mutex locks

[Mark Brown]

On Thu, 23 Apr 2026 19:51:54 +0700, phucduc.bui@gmail.com wrote:
> ASoC: apple: mca: Use guard() for mutex locks

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-7.2

Thanks!

[1/1] ASoC: apple: mca: Use guard() for mutex locks
      https://git.kernel.org/broonie/sound/c/fc86d55e8b78

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

Re: [PATCH] ASoC: apple: mca: Use guard() for mutex locks

[Bui Duc Phuc]

Hi Mark,

Thank you for applying the patch and for the explanation.
I'm still new to the process, so I appreciate the guidance.

Best regards,
Phuc