From 04702e8d0092832eaeeacc6b1bfbf81a66f242c9 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 1 Aug 2018 16:42:29 +0200 Subject: [PATCH] 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 --- sound/core/seq/seq_clientmgr.c | 26 +++++++------------------- 1 file 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(®ister_mutex)) - return -ERESTARTSYS; + mutex_lock(®ister_mutex); client = seq_create_client1(-1, SNDRV_SEQ_DEFAULT_EVENTS); - if (client == NULL) { + if (!client) { mutex_unlock(®ister_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(®ister_mutex)) - return -ERESTARTSYS; + mutex_lock(®ister_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(®ister_mutex)) - return -ERESTARTSYS; - + mutex_lock(®ister_mutex); err = snd_register_device(SNDRV_DEVICE_TYPE_SEQUENCER, NULL, 0, &snd_seq_f_ops, NULL, &seq_dev); + mutex_unlock(®ister_mutex); if (err < 0) { - mutex_unlock(®ister_mutex); put_device(&seq_dev); return err; } - mutex_unlock(®ister_mutex); - return 0; }