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authorTakashi Iwai <tiwai@suse.de>2009-11-01 11:11:07 +0100
committerTakashi Iwai <tiwai@suse.de>2009-11-01 11:11:07 +0100
commite87a3dd33eab30b4db539500064a9584867e4f2c (patch)
tree2f7ad16e46ae30518ff63bb5391b63f7f7cc74dd /sound/core
parentb14f5de731ae657d498d18d713c6431bfbeefb4b (diff)
parent3d00941371a765779c4e3509214c7e5793cce1fe (diff)
downloadlinux-next-e87a3dd33eab30b4db539500064a9584867e4f2c.tar.gz
Merge branch 'fix/misc' into topic/misc
Diffstat (limited to 'sound/core')
-rw-r--r--sound/core/pcm.c5
-rw-r--r--sound/core/pcm_native.c81
2 files changed, 27 insertions, 59 deletions
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 0c1440121c22..c69c60b2a48a 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -953,11 +953,12 @@ static int snd_pcm_dev_register(struct snd_device *device)
struct snd_pcm_substream *substream;
struct snd_pcm_notify *notify;
char str[16];
- struct snd_pcm *pcm = device->device_data;
+ struct snd_pcm *pcm;
struct device *dev;
- if (snd_BUG_ON(!pcm || !device))
+ if (snd_BUG_ON(!device || !device->device_data))
return -ENXIO;
+ pcm = device->device_data;
mutex_lock(&register_mutex);
err = snd_pcm_add(pcm);
if (err) {
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 59e5fbe6af51..ab73edf2c89a 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -1387,11 +1387,6 @@ static struct action_ops snd_pcm_action_drain_init = {
.post_action = snd_pcm_post_drain_init
};
-struct drain_rec {
- struct snd_pcm_substream *substream;
- wait_queue_t wait;
-};
-
static int snd_pcm_drop(struct snd_pcm_substream *substream);
/*
@@ -1407,10 +1402,9 @@ static int snd_pcm_drain(struct snd_pcm_substream *substream,
struct snd_card *card;
struct snd_pcm_runtime *runtime;
struct snd_pcm_substream *s;
+ wait_queue_t wait;
int result = 0;
- int i, num_drecs;
int nonblock = 0;
- struct drain_rec *drec, drec_tmp, *d;
card = substream->pcm->card;
runtime = substream->runtime;
@@ -1433,38 +1427,10 @@ static int snd_pcm_drain(struct snd_pcm_substream *substream,
} else if (substream->f_flags & O_NONBLOCK)
nonblock = 1;
- if (nonblock)
- goto lock; /* no need to allocate waitqueues */
-
- /* allocate temporary record for drain sync */
down_read(&snd_pcm_link_rwsem);
- if (snd_pcm_stream_linked(substream)) {
- drec = kmalloc(substream->group->count * sizeof(*drec), GFP_KERNEL);
- if (! drec) {
- up_read(&snd_pcm_link_rwsem);
- snd_power_unlock(card);
- return -ENOMEM;
- }
- } else
- drec = &drec_tmp;
-
- /* count only playback streams */
- num_drecs = 0;
- snd_pcm_group_for_each_entry(s, substream) {
- runtime = s->runtime;
- if (s->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- d = &drec[num_drecs++];
- d->substream = s;
- init_waitqueue_entry(&d->wait, current);
- add_wait_queue(&runtime->sleep, &d->wait);
- }
- }
- up_read(&snd_pcm_link_rwsem);
-
- lock:
snd_pcm_stream_lock_irq(substream);
/* resume pause */
- if (substream->runtime->status->state == SNDRV_PCM_STATE_PAUSED)
+ if (runtime->status->state == SNDRV_PCM_STATE_PAUSED)
snd_pcm_pause(substream, 0);
/* pre-start/stop - all running streams are changed to DRAINING state */
@@ -1479,25 +1445,35 @@ static int snd_pcm_drain(struct snd_pcm_substream *substream,
for (;;) {
long tout;
+ struct snd_pcm_runtime *to_check;
if (signal_pending(current)) {
result = -ERESTARTSYS;
break;
}
- /* all finished? */
- for (i = 0; i < num_drecs; i++) {
- runtime = drec[i].substream->runtime;
- if (runtime->status->state == SNDRV_PCM_STATE_DRAINING)
+ /* find a substream to drain */
+ to_check = NULL;
+ snd_pcm_group_for_each_entry(s, substream) {
+ if (s->stream != SNDRV_PCM_STREAM_PLAYBACK)
+ continue;
+ runtime = s->runtime;
+ if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
+ to_check = runtime;
break;
+ }
}
- if (i == num_drecs)
- break; /* yes, all drained */
-
+ if (!to_check)
+ break; /* all drained */
+ init_waitqueue_entry(&wait, current);
+ add_wait_queue(&to_check->sleep, &wait);
set_current_state(TASK_INTERRUPTIBLE);
snd_pcm_stream_unlock_irq(substream);
+ up_read(&snd_pcm_link_rwsem);
snd_power_unlock(card);
tout = schedule_timeout(10 * HZ);
snd_power_lock(card);
+ down_read(&snd_pcm_link_rwsem);
snd_pcm_stream_lock_irq(substream);
+ remove_wait_queue(&to_check->sleep, &wait);
if (tout == 0) {
if (substream->runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
result = -ESTRPIPE;
@@ -1512,16 +1488,7 @@ static int snd_pcm_drain(struct snd_pcm_substream *substream,
unlock:
snd_pcm_stream_unlock_irq(substream);
-
- if (!nonblock) {
- for (i = 0; i < num_drecs; i++) {
- d = &drec[i];
- runtime = d->substream->runtime;
- remove_wait_queue(&runtime->sleep, &d->wait);
- }
- if (drec != &drec_tmp)
- kfree(drec);
- }
+ up_read(&snd_pcm_link_rwsem);
snd_power_unlock(card);
return result;
@@ -3018,7 +2985,7 @@ static int snd_pcm_mmap_status_fault(struct vm_area_struct *area,
return 0;
}
-static struct vm_operations_struct snd_pcm_vm_ops_status =
+static const struct vm_operations_struct snd_pcm_vm_ops_status =
{
.fault = snd_pcm_mmap_status_fault,
};
@@ -3057,7 +3024,7 @@ static int snd_pcm_mmap_control_fault(struct vm_area_struct *area,
return 0;
}
-static struct vm_operations_struct snd_pcm_vm_ops_control =
+static const struct vm_operations_struct snd_pcm_vm_ops_control =
{
.fault = snd_pcm_mmap_control_fault,
};
@@ -3127,7 +3094,7 @@ static int snd_pcm_mmap_data_fault(struct vm_area_struct *area,
return 0;
}
-static struct vm_operations_struct snd_pcm_vm_ops_data =
+static const struct vm_operations_struct snd_pcm_vm_ops_data =
{
.open = snd_pcm_mmap_data_open,
.close = snd_pcm_mmap_data_close,
@@ -3151,7 +3118,7 @@ static int snd_pcm_default_mmap(struct snd_pcm_substream *substream,
* mmap the DMA buffer on I/O memory area
*/
#if SNDRV_PCM_INFO_MMAP_IOMEM
-static struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
+static const struct vm_operations_struct snd_pcm_vm_ops_data_mmio =
{
.open = snd_pcm_mmap_data_open,
.close = snd_pcm_mmap_data_close,