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authorTakashi Iwai <tiwai@suse.de>2018-08-01 17:42:29 +0300
committerTakashi Iwai <tiwai@suse.de>2018-08-01 23:54:36 +0300
commit04702e8d0092832eaeeacc6b1bfbf81a66f242c9 (patch)
treef878af60744e3db98e712b36bc2af3bacf974a54 /sound/core
parent00976ad5271999ba06d24319fd1031b178aff832 (diff)
downloadlinux-04702e8d0092832eaeeacc6b1bfbf81a66f242c9.tar.xz
ALSA: seq: Use no intrruptible mutex_lock
All usages of mutex in ALSA sequencer core would take too long, hence we don't have to care about the user interruption that makes things complicated. Let's replace them with simpler mutex_lock(). Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
-rw-r--r--sound/core/seq/seq_clientmgr.c26
1 files changed, 7 insertions, 19 deletions
diff --git a/sound/core/seq/seq_clientmgr.c b/sound/core/seq/seq_clientmgr.c
index a0b768e2f697..92e6524a3a9d 100644
--- a/sound/core/seq/seq_clientmgr.c
+++ b/sound/core/seq/seq_clientmgr.c
@@ -311,10 +311,9 @@ static int snd_seq_open(struct inode *inode, struct file *file)
if (err < 0)
return err;
- if (mutex_lock_interruptible(&register_mutex))
- return -ERESTARTSYS;
+ mutex_lock(&register_mutex);
client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS);
- if (client == NULL) {
+ if (!client) {
mutex_unlock(&register_mutex);
return -ENOMEM; /* failure code */
}
@@ -1704,10 +1703,7 @@ static int snd_seq_ioctl_get_queue_timer(struct snd_seq_client *client,
if (queue == NULL)
return -EINVAL;
- if (mutex_lock_interruptible(&queue->timer_mutex)) {
- queuefree(queue);
- return -ERESTARTSYS;
- }
+ mutex_lock(&queue->timer_mutex);
tmr = queue->timer;
memset(timer, 0, sizeof(*timer));
timer->queue = queue->queue;
@@ -1741,10 +1737,7 @@ static int snd_seq_ioctl_set_queue_timer(struct snd_seq_client *client,
q = queueptr(timer->queue);
if (q == NULL)
return -ENXIO;
- if (mutex_lock_interruptible(&q->timer_mutex)) {
- queuefree(q);
- return -ERESTARTSYS;
- }
+ mutex_lock(&q->timer_mutex);
tmr = q->timer;
snd_seq_queue_timer_close(timer->queue);
tmr->type = timer->type;
@@ -2180,8 +2173,7 @@ int snd_seq_create_kernel_client(struct snd_card *card, int client_index,
if (card == NULL && client_index >= SNDRV_SEQ_GLOBAL_CLIENTS)
return -EINVAL;
- if (mutex_lock_interruptible(&register_mutex))
- return -ERESTARTSYS;
+ mutex_lock(&register_mutex);
if (card) {
client_index += SNDRV_SEQ_GLOBAL_CLIENTS
@@ -2522,19 +2514,15 @@ int __init snd_sequencer_device_init(void)
snd_device_initialize(&seq_dev, NULL);
dev_set_name(&seq_dev, "seq");
- if (mutex_lock_interruptible(&register_mutex))
- return -ERESTARTSYS;
-
+ mutex_lock(&register_mutex);
err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0,
&snd_seq_f_ops, NULL, &seq_dev);
+ mutex_unlock(&register_mutex);
if (err < 0) {
- mutex_unlock(&register_mutex);
put_device(&seq_dev);
return err;
}
- mutex_unlock(&register_mutex);
-
return 0;
}