diff options
| author | Takashi Iwai <tiwai@suse.de> | 2024-02-27 09:52:53 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2024-02-28 15:01:21 +0100 |
| commit | 742ecf3ce1acdbcd0bc936178e1eaf346a0fd376 (patch) | |
| tree | 797c71fe7470331254c6364b9cb2ffe1d4300bea /sound/core/sound.c | |
| parent | 7234795b59f7b0b14569ec46dce56300a4988067 (diff) | |
ALSA: core: Use guard() for locking
We can simplify the code gracefully with new guard() macro and co for
automatic cleanup of locks.
Only the code refactoring, and no functional changes.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20240227085306.9764-12-tiwai@suse.de
Diffstat (limited to 'sound/core/sound.c')
| -rw-r--r-- | sound/core/sound.c | 28 |
1 files changed, 11 insertions, 17 deletions
diff --git a/sound/core/sound.c b/sound/core/sound.c index df5571d98629..b9db9aa0bfcb 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) |