diff --git a/include/sound/timer.h b/include/sound/timer.h index 8a13c09c85f73..a53e37bcd746f 100644 --- a/include/sound/timer.h +++ b/include/sound/timer.h @@ -118,7 +118,9 @@ int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer); int snd_timer_global_free(struct snd_timer *timer); int snd_timer_global_register(struct snd_timer *timer); -int snd_timer_open(struct snd_timer_instance **ti, char *owner, struct snd_timer_id *tid, unsigned int slave_id); +struct snd_timer_instance *snd_timer_instance_new(const char *owner); +void snd_timer_instance_free(struct snd_timer_instance *timeri); +int snd_timer_open(struct snd_timer_instance *timeri, struct snd_timer_id *tid, unsigned int slave_id); void snd_timer_close(struct snd_timer_instance *timeri); unsigned long snd_timer_resolution(struct snd_timer_instance *timeri); int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks); diff --git a/sound/core/seq/seq_timer.c b/sound/core/seq/seq_timer.c index 161f3170bd7ea..63dc7bdb622df 100644 --- a/sound/core/seq/seq_timer.c +++ b/sound/core/seq/seq_timer.c @@ -272,7 +272,13 @@ int snd_seq_timer_open(struct snd_seq_queue *q) return -EINVAL; if (tmr->alsa_id.dev_class != SNDRV_TIMER_CLASS_SLAVE) tmr->alsa_id.dev_sclass = SNDRV_TIMER_SCLASS_SEQUENCER; - err = snd_timer_open(&t, str, &tmr->alsa_id, q->queue); + t = snd_timer_instance_new(str); + if (!t) + return -ENOMEM; + t->callback = snd_seq_timer_interrupt; + t->callback_data = q; + t->flags |= SNDRV_TIMER_IFLG_AUTO; + err = snd_timer_open(t, &tmr->alsa_id, q->queue); if (err < 0 && tmr->alsa_id.dev_class != SNDRV_TIMER_CLASS_SLAVE) { if (tmr->alsa_id.dev_class != SNDRV_TIMER_CLASS_GLOBAL || tmr->alsa_id.device != SNDRV_TIMER_GLOBAL_SYSTEM) { @@ -282,16 +288,14 @@ int snd_seq_timer_open(struct snd_seq_queue *q) tid.dev_sclass = SNDRV_TIMER_SCLASS_SEQUENCER; tid.card = -1; tid.device = SNDRV_TIMER_GLOBAL_SYSTEM; - err = snd_timer_open(&t, str, &tid, q->queue); + err = snd_timer_open(t, &tid, q->queue); } } if (err < 0) { pr_err("ALSA: seq fatal error: cannot create timer (%i)\n", err); + snd_timer_instance_free(t); return err; } - t->callback = snd_seq_timer_interrupt; - t->callback_data = q; - t->flags |= SNDRV_TIMER_IFLG_AUTO; spin_lock_irq(&tmr->lock); tmr->timeri = t; spin_unlock_irq(&tmr->lock); @@ -310,8 +314,10 @@ int snd_seq_timer_close(struct snd_seq_queue *q) t = tmr->timeri; tmr->timeri = NULL; spin_unlock_irq(&tmr->lock); - if (t) + if (t) { snd_timer_close(t); + snd_timer_instance_free(t); + } return 0; } diff --git a/sound/core/timer.c b/sound/core/timer.c index c0a73913ec62b..9091030f4a89e 100644 --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -88,12 +88,11 @@ static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_l /* * create a timer instance with the given owner string. - * when timer is not NULL, increments the module counter */ -static struct snd_timer_instance *snd_timer_instance_new(char *owner, - struct snd_timer *timer) +struct snd_timer_instance *snd_timer_instance_new(const char *owner) { struct snd_timer_instance *timeri; + timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); if (timeri == NULL) return NULL; @@ -108,15 +107,20 @@ static struct snd_timer_instance *snd_timer_instance_new(char *owner, INIT_LIST_HEAD(&timeri->slave_list_head); INIT_LIST_HEAD(&timeri->slave_active_head); - timeri->timer = timer; - if (timer && !try_module_get(timer->module)) { + return timeri; +} +EXPORT_SYMBOL(snd_timer_instance_new); + +void snd_timer_instance_free(struct snd_timer_instance *timeri) +{ + if (timeri) { + if (timeri->private_free) + timeri->private_free(timeri); kfree(timeri->owner); kfree(timeri); - return NULL; } - - return timeri; } +EXPORT_SYMBOL(snd_timer_instance_free); /* * find a timer instance from the given timer id @@ -236,12 +240,11 @@ static void snd_timer_close_locked(struct snd_timer_instance *timeri, * open a timer instance * when opening a master, the slave id must be here given. */ -int snd_timer_open(struct snd_timer_instance **ti, - char *owner, struct snd_timer_id *tid, +int snd_timer_open(struct snd_timer_instance *timeri, + struct snd_timer_id *tid, unsigned int slave_id) { struct snd_timer *timer; - struct snd_timer_instance *timeri = NULL; struct device *card_dev_to_put = NULL; int err; @@ -259,22 +262,14 @@ int snd_timer_open(struct snd_timer_instance **ti, err = -EBUSY; goto unlock; } - timeri = snd_timer_instance_new(owner, NULL); - if (!timeri) { - err = -ENOMEM; - goto unlock; - } timeri->slave_class = tid->dev_sclass; timeri->slave_id = tid->device; timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; list_add_tail(&timeri->open_list, &snd_timer_slave_list); num_slaves++; err = snd_timer_check_slave(timeri); - if (err < 0) { - snd_timer_close_locked(timeri, &card_dev_to_put); - timeri = NULL; - } - goto unlock; + if (err < 0) + goto close; } /* open a master instance */ @@ -304,45 +299,40 @@ int snd_timer_open(struct snd_timer_instance **ti, err = -EBUSY; goto unlock; } - timeri = snd_timer_instance_new(owner, timer); - if (!timeri) { - err = -ENOMEM; + if (!try_module_get(timer->module)) { + err = -EBUSY; goto unlock; } /* take a card refcount for safe disconnection */ - if (timer->card) + if (timer->card) { get_device(&timer->card->card_dev); - timeri->slave_class = tid->dev_sclass; - timeri->slave_id = slave_id; + card_dev_to_put = &timer->card->card_dev; + } if (list_empty(&timer->open_list_head) && timer->hw.open) { err = timer->hw.open(timer); if (err) { - kfree(timeri->owner); - kfree(timeri); - timeri = NULL; - - if (timer->card) - card_dev_to_put = &timer->card->card_dev; module_put(timer->module); goto unlock; } } + timeri->timer = timer; + timeri->slave_class = tid->dev_sclass; + timeri->slave_id = slave_id; + list_add_tail(&timeri->open_list, &timer->open_list_head); timer->num_instances++; err = snd_timer_check_master(timeri); - if (err < 0) { + close: + if (err < 0) snd_timer_close_locked(timeri, &card_dev_to_put); - timeri = NULL; - } unlock: mutex_unlock(®ister_mutex); /* put_device() is called after unlock for avoiding deadlock */ - if (card_dev_to_put) + if (err < 0 && card_dev_to_put) put_device(card_dev_to_put); - *ti = timeri; return err; } EXPORT_SYMBOL(snd_timer_open); @@ -363,9 +353,11 @@ static void snd_timer_close_locked(struct snd_timer_instance *timeri, spin_unlock_irq(&timer->lock); } - list_del(&timeri->open_list); - if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) - num_slaves--; + if (!list_empty(&timeri->open_list)) { + list_del_init(&timeri->open_list); + if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) + num_slaves--; + } /* force to stop the timer */ snd_timer_stop(timeri); @@ -384,6 +376,7 @@ static void snd_timer_close_locked(struct snd_timer_instance *timeri, /* remove slave links */ spin_lock_irq(&slave_active_lock); spin_lock(&timer->lock); + timeri->timer = NULL; list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, open_list) { list_move_tail(&slave->open_list, &snd_timer_slave_list); @@ -401,11 +394,6 @@ static void snd_timer_close_locked(struct snd_timer_instance *timeri, timer = NULL; } - if (timeri->private_free) - timeri->private_free(timeri); - kfree(timeri->owner); - kfree(timeri); - if (timer) { if (list_empty(&timer->open_list_head) && timer->hw.close) timer->hw.close(timer); @@ -1480,8 +1468,10 @@ static int snd_timer_user_release(struct inode *inode, struct file *file) tu = file->private_data; file->private_data = NULL; mutex_lock(&tu->ioctl_lock); - if (tu->timeri) + if (tu->timeri) { snd_timer_close(tu->timeri); + snd_timer_instance_free(tu->timeri); + } mutex_unlock(&tu->ioctl_lock); kfree(tu->queue); kfree(tu->tqueue); @@ -1722,6 +1712,7 @@ static int snd_timer_user_tselect(struct file *file, tu = file->private_data; if (tu->timeri) { snd_timer_close(tu->timeri); + snd_timer_instance_free(tu->timeri); tu->timeri = NULL; } if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { @@ -1731,9 +1722,11 @@ static int snd_timer_user_tselect(struct file *file, sprintf(str, "application %i", current->pid); if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; - err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); - if (err < 0) + tu->timeri = snd_timer_instance_new(str); + if (!tu->timeri) { + err = -ENOMEM; goto __err; + } tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; tu->timeri->callback = tu->tread @@ -1742,6 +1735,12 @@ static int snd_timer_user_tselect(struct file *file, tu->timeri->callback_data = (void *)tu; tu->timeri->disconnect = snd_timer_user_disconnect; + err = snd_timer_open(tu->timeri, &tselect.id, current->pid); + if (err < 0) { + snd_timer_instance_free(tu->timeri); + tu->timeri = NULL; + } + __err: return err; }