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Diffstat (limited to 'sound/core/timer.c')
-rw-r--r--sound/core/timer.c55
1 files changed, 37 insertions, 18 deletions
diff --git a/sound/core/timer.c b/sound/core/timer.c
index 950eed0..22c43b3 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -72,7 +72,7 @@ struct snd_timer_user {
struct timespec tstamp; /* trigger tstamp */
wait_queue_head_t qchange_sleep;
struct fasync_struct *fasync;
- struct mutex tread_sem;
+ struct mutex ioctl_lock;
};
/* list of timers */
@@ -214,11 +214,13 @@ static void snd_timer_check_master(struct snd_timer_instance *master)
slave->slave_id == master->slave_id) {
list_move_tail(&slave->open_list, &master->slave_list_head);
spin_lock_irq(&slave_active_lock);
+ spin_lock(&master->timer->lock);
slave->master = master;
slave->timer = master->timer;
if (slave->flags & SNDRV_TIMER_IFLG_RUNNING)
list_add_tail(&slave->active_list,
&master->slave_active_head);
+ spin_unlock(&master->timer->lock);
spin_unlock_irq(&slave_active_lock);
}
}
@@ -342,15 +344,18 @@ int snd_timer_close(struct snd_timer_instance *timeri)
timer->hw.close)
timer->hw.close(timer);
/* remove slave links */
+ spin_lock_irq(&slave_active_lock);
+ spin_lock(&timer->lock);
list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head,
open_list) {
- spin_lock_irq(&slave_active_lock);
- _snd_timer_stop(slave, 1, SNDRV_TIMER_EVENT_RESOLUTION);
list_move_tail(&slave->open_list, &snd_timer_slave_list);
slave->master = NULL;
slave->timer = NULL;
- spin_unlock_irq(&slave_active_lock);
+ list_del_init(&slave->ack_list);
+ list_del_init(&slave->active_list);
}
+ spin_unlock(&timer->lock);
+ spin_unlock_irq(&slave_active_lock);
mutex_unlock(&register_mutex);
}
if (timeri->private_free)
@@ -436,9 +441,12 @@ static int snd_timer_start_slave(struct snd_timer_instance *timeri)
spin_lock_irqsave(&slave_active_lock, flags);
timeri->flags |= SNDRV_TIMER_IFLG_RUNNING;
- if (timeri->master)
+ if (timeri->master && timeri->timer) {
+ spin_lock(&timeri->timer->lock);
list_add_tail(&timeri->active_list,
&timeri->master->slave_active_head);
+ spin_unlock(&timeri->timer->lock);
+ }
spin_unlock_irqrestore(&slave_active_lock, flags);
return 1; /* delayed start */
}
@@ -484,6 +492,8 @@ static int _snd_timer_stop(struct snd_timer_instance * timeri,
if (!keep_flag) {
spin_lock_irqsave(&slave_active_lock, flags);
timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING;
+ list_del_init(&timeri->ack_list);
+ list_del_init(&timeri->active_list);
spin_unlock_irqrestore(&slave_active_lock, flags);
}
goto __end;
@@ -689,7 +699,7 @@ void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left)
} else {
ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING;
if (--timer->running)
- list_del(&ti->active_list);
+ list_del_init(&ti->active_list);
}
if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) ||
(ti->flags & SNDRV_TIMER_IFLG_FAST))
@@ -1170,6 +1180,7 @@ static void snd_timer_user_ccallback(struct snd_timer_instance *timeri,
tu->tstamp = *tstamp;
if ((tu->filter & (1 << event)) == 0 || !tu->tread)
return;
+ memset(&r1, 0, sizeof(r1));
r1.event = event;
r1.tstamp = *tstamp;
r1.val = resolution;
@@ -1204,6 +1215,7 @@ static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri,
}
if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) &&
tu->last_resolution != resolution) {
+ memset(&r1, 0, sizeof(r1));
r1.event = SNDRV_TIMER_EVENT_RESOLUTION;
r1.tstamp = tstamp;
r1.val = resolution;
@@ -1252,7 +1264,7 @@ static int snd_timer_user_open(struct inode *inode, struct file *file)
return -ENOMEM;
spin_lock_init(&tu->qlock);
init_waitqueue_head(&tu->qchange_sleep);
- mutex_init(&tu->tread_sem);
+ mutex_init(&tu->ioctl_lock);
tu->ticks = 1;
tu->queue_size = 128;
tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read),
@@ -1272,8 +1284,10 @@ static int snd_timer_user_release(struct inode *inode, struct file *file)
if (file->private_data) {
tu = file->private_data;
file->private_data = NULL;
+ mutex_lock(&tu->ioctl_lock);
if (tu->timeri)
snd_timer_close(tu->timeri);
+ mutex_unlock(&tu->ioctl_lock);
kfree(tu->queue);
kfree(tu->tqueue);
kfree(tu);
@@ -1511,7 +1525,6 @@ static int snd_timer_user_tselect(struct file *file,
int err = 0;
tu = file->private_data;
- mutex_lock(&tu->tread_sem);
if (tu->timeri) {
snd_timer_close(tu->timeri);
tu->timeri = NULL;
@@ -1555,7 +1568,6 @@ static int snd_timer_user_tselect(struct file *file,
}
__err:
- mutex_unlock(&tu->tread_sem);
return err;
}
@@ -1669,6 +1681,7 @@ static int snd_timer_user_params(struct file *file,
if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) {
if (tu->tread) {
struct snd_timer_tread tread;
+ memset(&tread, 0, sizeof(tread));
tread.event = SNDRV_TIMER_EVENT_EARLY;
tread.tstamp.tv_sec = 0;
tread.tstamp.tv_nsec = 0;
@@ -1768,7 +1781,7 @@ enum {
SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23),
};
-static long snd_timer_user_ioctl(struct file *file, unsigned int cmd,
+static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
struct snd_timer_user *tu;
@@ -1785,17 +1798,11 @@ static long snd_timer_user_ioctl(struct file *file, unsigned int cmd,
{
int xarg;
- mutex_lock(&tu->tread_sem);
- if (tu->timeri) { /* too late */
- mutex_unlock(&tu->tread_sem);
+ if (tu->timeri) /* too late */
return -EBUSY;
- }
- if (get_user(xarg, p)) {
- mutex_unlock(&tu->tread_sem);
+ if (get_user(xarg, p))
return -EFAULT;
- }
tu->tread = xarg ? 1 : 0;
- mutex_unlock(&tu->tread_sem);
return 0;
}
case SNDRV_TIMER_IOCTL_GINFO:
@@ -1828,6 +1835,18 @@ static long snd_timer_user_ioctl(struct file *file, unsigned int cmd,
return -ENOTTY;
}
+static long snd_timer_user_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ struct snd_timer_user *tu = file->private_data;
+ long ret;
+
+ mutex_lock(&tu->ioctl_lock);
+ ret = __snd_timer_user_ioctl(file, cmd, arg);
+ mutex_unlock(&tu->ioctl_lock);
+ return ret;
+}
+
static int snd_timer_user_fasync(int fd, struct file * file, int on)
{
struct snd_timer_user *tu;
generated by cgit v1.1 at 2024-05-05 23:53:31 +0000