int qtail;
int qused;
int queue_size;
+ bool disconnected;
struct snd_timer_read *queue;
struct snd_timer_tread *tqueue;
spinlock_t qlock;
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 */
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);
}
}
mutex_unlock(®ister_mutex);
return -ENOMEM;
}
+ /* take a card refcount for safe disconnection */
+ if (timer->card)
+ get_device(&timer->card->card_dev);
timeri->slave_class = tid->dev_sclass;
timeri->slave_id = slave_id;
if (list_empty(&timer->open_list_head) && timer->hw.open)
return 0;
}
-static int _snd_timer_stop(struct snd_timer_instance *timeri,
- int keep_flag, int event);
+static int _snd_timer_stop(struct snd_timer_instance *timeri, int event);
/*
* close a timer instance
spin_unlock_irq(&timer->lock);
mutex_lock(®ister_mutex);
list_del(&timeri->open_list);
- if (timer && list_empty(&timer->open_list_head) &&
+ if (list_empty(&timer->open_list_head) &&
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);
+ /* release a card refcount for safe disconnection */
+ if (timer->card)
+ put_device(&timer->card->card_dev);
mutex_unlock(®ister_mutex);
}
out:
spin_lock_irqsave(&timer->lock, flags);
list_for_each_entry(ts, &ti->slave_active_head, active_list)
if (ts->ccallback)
- ts->ccallback(ti, event + 100, &tstamp, resolution);
+ ts->ccallback(ts, event + 100, &tstamp, resolution);
spin_unlock_irqrestore(&timer->lock, flags);
}
unsigned long flags;
spin_lock_irqsave(&slave_active_lock, flags);
+ if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) {
+ spin_unlock_irqrestore(&slave_active_lock, flags);
+ return -EBUSY;
+ }
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 */
}
return -EINVAL;
if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) {
result = snd_timer_start_slave(timeri);
- snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START);
+ if (result >= 0)
+ snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START);
return result;
}
timer = timeri->timer;
if (timer == NULL)
return -EINVAL;
+ if (timer->card && timer->card->shutdown)
+ return -ENODEV;
spin_lock_irqsave(&timer->lock, flags);
+ if (timeri->flags & (SNDRV_TIMER_IFLG_RUNNING |
+ SNDRV_TIMER_IFLG_START)) {
+ result = -EBUSY;
+ goto unlock;
+ }
timeri->ticks = timeri->cticks = ticks;
timeri->pticks = 0;
result = snd_timer_start1(timer, timeri, ticks);
+ unlock:
spin_unlock_irqrestore(&timer->lock, flags);
- snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START);
+ if (result >= 0)
+ snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START);
return result;
}
-static int _snd_timer_stop(struct snd_timer_instance * timeri,
- int keep_flag, int event)
+static int _snd_timer_stop(struct snd_timer_instance *timeri, int event)
{
struct snd_timer *timer;
unsigned long flags;
return -ENXIO;
if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) {
- if (!keep_flag) {
- spin_lock_irqsave(&slave_active_lock, flags);
- timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING;
+ spin_lock_irqsave(&slave_active_lock, flags);
+ if (!(timeri->flags & SNDRV_TIMER_IFLG_RUNNING)) {
spin_unlock_irqrestore(&slave_active_lock, flags);
+ return -EBUSY;
}
+ if (timeri->timer)
+ spin_lock(&timeri->timer->lock);
+ timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING;
+ list_del_init(&timeri->ack_list);
+ list_del_init(&timeri->active_list);
+ if (timeri->timer)
+ spin_unlock(&timeri->timer->lock);
+ spin_unlock_irqrestore(&slave_active_lock, flags);
goto __end;
}
timer = timeri->timer;
if (!timer)
return -EINVAL;
spin_lock_irqsave(&timer->lock, flags);
+ if (!(timeri->flags & (SNDRV_TIMER_IFLG_RUNNING |
+ SNDRV_TIMER_IFLG_START))) {
+ spin_unlock_irqrestore(&timer->lock, flags);
+ return -EBUSY;
+ }
list_del_init(&timeri->ack_list);
list_del_init(&timeri->active_list);
+ if (timer->card && timer->card->shutdown) {
+ spin_unlock_irqrestore(&timer->lock, flags);
+ return 0;
+ }
if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) &&
!(--timer->running)) {
timer->hw.stop(timer);
}
}
}
- if (!keep_flag)
- timeri->flags &=
- ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START);
+ timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START);
spin_unlock_irqrestore(&timer->lock, flags);
__end:
if (event != SNDRV_TIMER_EVENT_RESOLUTION)
unsigned long flags;
int err;
- err = _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_STOP);
+ err = _snd_timer_stop(timeri, SNDRV_TIMER_EVENT_STOP);
if (err < 0)
return err;
timer = timeri->timer;
timer = timeri->timer;
if (! timer)
return -EINVAL;
+ if (timer->card && timer->card->shutdown)
+ return -ENODEV;
spin_lock_irqsave(&timer->lock, flags);
+ if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) {
+ result = -EBUSY;
+ goto unlock;
+ }
if (!timeri->cticks)
timeri->cticks = 1;
timeri->pticks = 0;
result = snd_timer_start1(timer, timeri, timer->sticks);
+ unlock:
spin_unlock_irqrestore(&timer->lock, flags);
snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_CONTINUE);
return result;
*/
int snd_timer_pause(struct snd_timer_instance * timeri)
{
- return _snd_timer_stop(timeri, 0, SNDRV_TIMER_EVENT_PAUSE);
+ return _snd_timer_stop(timeri, SNDRV_TIMER_EVENT_PAUSE);
}
/*
unsigned long resolution, ticks;
unsigned long flags;
+ if (timer->card && timer->card->shutdown)
+ return;
+
spin_lock_irqsave(&timer->lock, flags);
/* now process all callbacks */
while (!list_empty(&timer->sack_list_head)) {
if (timer == NULL)
return;
+ if (timer->card && timer->card->shutdown)
+ return;
+
spin_lock_irqsave(&timer->lock, flags);
/* remember the current resolution */
ti->cticks = ti->ticks;
} else {
ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING;
- if (--timer->running)
- list_del(&ti->active_list);
+ --timer->running;
+ list_del_init(&ti->active_list);
}
if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) ||
(ti->flags & SNDRV_TIMER_IFLG_FAST))
return 0;
}
+/* just for reference in snd_timer_dev_disconnect() below */
+static void snd_timer_user_ccallback(struct snd_timer_instance *timeri,
+ int event, struct timespec *tstamp,
+ unsigned long resolution);
+
static int snd_timer_dev_disconnect(struct snd_device *device)
{
struct snd_timer *timer = device->device_data;
+ struct snd_timer_instance *ti;
+
mutex_lock(®ister_mutex);
list_del_init(&timer->device_list);
+ /* wake up pending sleepers */
+ list_for_each_entry(ti, &timer->open_list_head, open_list) {
+ /* FIXME: better to have a ti.disconnect() op */
+ if (ti->ccallback == snd_timer_user_ccallback) {
+ struct snd_timer_user *tu = ti->callback_data;
+
+ tu->disconnected = true;
+ wake_up(&tu->qchange_sleep);
+ }
+ }
mutex_unlock(®ister_mutex);
return 0;
}
unsigned long resolution = 0;
struct snd_timer_instance *ti, *ts;
+ if (timer->card && timer->card->shutdown)
+ return;
if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE))
return;
if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART ||
return snd_timer_global_register(timer);
}
-#ifdef CONFIG_PROC_FS
+#ifdef CONFIG_SND_PROC_FS
/*
* Info interface
*/
mutex_lock(®ister_mutex);
list_for_each_entry(timer, &snd_timer_list, device_list) {
+ if (timer->card && timer->card->shutdown)
+ continue;
switch (timer->tmr_class) {
case SNDRV_TIMER_CLASS_GLOBAL:
snd_iprintf(buffer, "G%i: ", timer->tmr_device);
{
snd_info_free_entry(snd_timer_proc_entry);
}
-#else /* !CONFIG_PROC_FS */
+#else /* !CONFIG_SND_PROC_FS */
#define snd_timer_proc_init()
#define snd_timer_proc_done()
#endif
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),
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);
int err = 0;
tu = file->private_data;
- mutex_lock(&tu->tread_sem);
if (tu->timeri) {
snd_timer_close(tu->timeri);
tu->timeri = NULL;
}
__err:
- mutex_unlock(&tu->tread_sem);
return err;
}
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;
{
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:
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;
{
struct snd_timer_user *tu;
long result = 0, unit;
+ int qhead;
int err = 0;
tu = file->private_data;
if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) {
err = -EAGAIN;
- break;
+ goto _error;
}
set_current_state(TASK_INTERRUPTIBLE);
remove_wait_queue(&tu->qchange_sleep, &wait);
+ if (tu->disconnected) {
+ err = -ENODEV;
+ goto _error;
+ }
if (signal_pending(current)) {
err = -ERESTARTSYS;
- break;
+ goto _error;
}
}
+ qhead = tu->qhead++;
+ tu->qhead %= tu->queue_size;
spin_unlock_irq(&tu->qlock);
- if (err < 0)
- goto _error;
if (tu->tread) {
- if (copy_to_user(buffer, &tu->tqueue[tu->qhead++],
- sizeof(struct snd_timer_tread))) {
+ if (copy_to_user(buffer, &tu->tqueue[qhead],
+ sizeof(struct snd_timer_tread)))
err = -EFAULT;
- goto _error;
- }
} else {
- if (copy_to_user(buffer, &tu->queue[tu->qhead++],
- sizeof(struct snd_timer_read))) {
+ if (copy_to_user(buffer, &tu->queue[qhead],
+ sizeof(struct snd_timer_read)))
err = -EFAULT;
- goto _error;
- }
}
- tu->qhead %= tu->queue_size;
-
- result += unit;
- buffer += unit;
-
spin_lock_irq(&tu->qlock);
tu->qused--;
+ if (err < 0)
+ goto _error;
+ result += unit;
+ buffer += unit;
}
- spin_unlock_irq(&tu->qlock);
_error:
+ spin_unlock_irq(&tu->qlock);
return result > 0 ? result : err;
}
mask = 0;
if (tu->qused)
mask |= POLLIN | POLLRDNORM;
+ if (tu->disconnected)
+ mask |= POLLERR;
return mask;
}
Code Review / kvmfornfv.git / blobdiff