From 94ac2ab3fff96814d7460a27a0e9d004abbd4128 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 19 Jun 2024 23:00:37 +0200
Subject: Merging upstream version 6.9.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 sound/core/sound.c | 28 +++++++++++-----------------
 1 file changed, 11 insertions(+), 17 deletions(-)

(limited to 'sound/core/sound.c')

diff --git a/sound/core/sound.c b/sound/core/sound.c
index df5571d986..b9db9aa0bf 100644
--- a/sound/core/sound.c
+++ b/sound/core/sound.c
@@ -103,7 +103,7 @@ void *snd_lookup_minor_data(unsigned int minor, int type)
 
 	if (minor >= ARRAY_SIZE(snd_minors))
 		return NULL;
-	mutex_lock(&sound_mutex);
+	guard(mutex)(&sound_mutex);
 	mreg = snd_minors[minor];
 	if (mreg && mreg->type == type) {
 		private_data = mreg->private_data;
@@ -111,7 +111,6 @@ void *snd_lookup_minor_data(unsigned int minor, int type)
 			get_device(&mreg->card_ptr->card_dev);
 	} else
 		private_data = NULL;
-	mutex_unlock(&sound_mutex);
 	return private_data;
 }
 EXPORT_SYMBOL(snd_lookup_minor_data);
@@ -150,17 +149,15 @@ static int snd_open(struct inode *inode, struct file *file)
 
 	if (minor >= ARRAY_SIZE(snd_minors))
 		return -ENODEV;
-	mutex_lock(&sound_mutex);
-	mptr = snd_minors[minor];
-	if (mptr == NULL) {
-		mptr = autoload_device(minor);
-		if (!mptr) {
-			mutex_unlock(&sound_mutex);
-			return -ENODEV;
+	scoped_guard(mutex, &sound_mutex) {
+		mptr = snd_minors[minor];
+		if (mptr == NULL) {
+			mptr = autoload_device(minor);
+			if (!mptr)
+				return -ENODEV;
 		}
+		new_fops = fops_get(mptr->f_ops);
 	}
-	new_fops = fops_get(mptr->f_ops);
-	mutex_unlock(&sound_mutex);
 	if (!new_fops)
 		return -ENODEV;
 	replace_fops(file, new_fops);
@@ -269,7 +266,7 @@ int snd_register_device(int type, struct snd_card *card, int dev,
 	preg->f_ops = f_ops;
 	preg->private_data = private_data;
 	preg->card_ptr = card;
-	mutex_lock(&sound_mutex);
+	guard(mutex)(&sound_mutex);
 	minor = snd_find_free_minor(type, card, dev);
 	if (minor < 0) {
 		err = minor;
@@ -284,7 +281,6 @@ int snd_register_device(int type, struct snd_card *card, int dev,
 
 	snd_minors[minor] = preg;
  error:
-	mutex_unlock(&sound_mutex);
 	if (err < 0)
 		kfree(preg);
 	return err;
@@ -305,7 +301,7 @@ int snd_unregister_device(struct device *dev)
 	int minor;
 	struct snd_minor *preg;
 
-	mutex_lock(&sound_mutex);
+	guard(mutex)(&sound_mutex);
 	for (minor = 0; minor < ARRAY_SIZE(snd_minors); ++minor) {
 		preg = snd_minors[minor];
 		if (preg && preg->dev == dev) {
@@ -315,7 +311,6 @@ int snd_unregister_device(struct device *dev)
 			break;
 		}
 	}
-	mutex_unlock(&sound_mutex);
 	if (minor >= ARRAY_SIZE(snd_minors))
 		return -ENOENT;
 	return 0;
@@ -355,7 +350,7 @@ static void snd_minor_info_read(struct snd_info_entry *entry, struct snd_info_bu
 	int minor;
 	struct snd_minor *mptr;
 
-	mutex_lock(&sound_mutex);
+	guard(mutex)(&sound_mutex);
 	for (minor = 0; minor < SNDRV_OS_MINORS; ++minor) {
 		mptr = snd_minors[minor];
 		if (!mptr)
@@ -373,7 +368,6 @@ static void snd_minor_info_read(struct snd_info_entry *entry, struct snd_info_bu
 			snd_iprintf(buffer, "%3i:        : %s\n", minor,
 				    snd_device_type_name(mptr->type));
 	}
-	mutex_unlock(&sound_mutex);
 }
 
 int __init snd_minor_info_init(void)
-- 
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