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authorTakashi Iwai <tiwai@suse.de>2016-05-24 16:07:39 +0300
committerTakashi Iwai <tiwai@suse.de>2017-06-14 08:43:44 +0300
commit68b4acd322494444803a3f49884ae889c8ec6689 (patch)
treec570aa7520be13f8d2653ce0f6b1db6baf5716e1 /sound/core/pcm_native.c
parent34bcc44abb302d1586bf1eb7548be75d0f56babc (diff)
downloadlinux-68b4acd322494444803a3f49884ae889c8ec6689.tar.xz
ALSA: pcm: Apply power lock globally to common ioctls
All PCM common ioctls should run only in the powered up state, but currently only a few ioctls do the proper snd_power_lock() and snd_power_wait() invocations. Instead of adding to each place, do it commonly in the caller side, so that all these ioctls are assured to be operated at the power up state. Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/pcm_native.c')
-rw-r--r--sound/core/pcm_native.c56
1 files changed, 19 insertions, 37 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 798bca967c0e..bd1b74aa2068 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -1540,14 +1540,7 @@ static const struct action_ops snd_pcm_action_resume = {
static int snd_pcm_resume(struct snd_pcm_substream *substream)
{
- struct snd_card *card = substream->pcm->card;
- int res;
-
- snd_power_lock(card);
- if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
- res = snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
- snd_power_unlock(card);
- return res;
+ return snd_pcm_action_lock_irq(&snd_pcm_action_resume, substream, 0);
}
#else
@@ -1566,17 +1559,9 @@ static int snd_pcm_resume(struct snd_pcm_substream *substream)
*/
static int snd_pcm_xrun(struct snd_pcm_substream *substream)
{
- struct snd_card *card = substream->pcm->card;
struct snd_pcm_runtime *runtime = substream->runtime;
int result;
- snd_power_lock(card);
- if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
- result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
- if (result < 0)
- goto _unlock;
- }
-
snd_pcm_stream_lock_irq(substream);
switch (runtime->status->state) {
case SNDRV_PCM_STATE_XRUN:
@@ -1589,8 +1574,6 @@ static int snd_pcm_xrun(struct snd_pcm_substream *substream)
result = -EBADFD;
}
snd_pcm_stream_unlock_irq(substream);
- _unlock:
- snd_power_unlock(card);
return result;
}
@@ -1694,8 +1677,6 @@ static const struct action_ops snd_pcm_action_prepare = {
static int snd_pcm_prepare(struct snd_pcm_substream *substream,
struct file *file)
{
- int res;
- struct snd_card *card = substream->pcm->card;
int f_flags;
if (file)
@@ -1703,12 +1684,8 @@ static int snd_pcm_prepare(struct snd_pcm_substream *substream,
else
f_flags = substream->f_flags;
- snd_power_lock(card);
- if ((res = snd_power_wait(card, SNDRV_CTL_POWER_D0)) >= 0)
- res = snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
- substream, f_flags);
- snd_power_unlock(card);
- return res;
+ return snd_pcm_action_nonatomic(&snd_pcm_action_prepare,
+ substream, f_flags);
}
/*
@@ -1805,15 +1782,6 @@ static int snd_pcm_drain(struct snd_pcm_substream *substream,
if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
return -EBADFD;
- snd_power_lock(card);
- if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
- result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
- if (result < 0) {
- snd_power_unlock(card);
- return result;
- }
- }
-
if (file) {
if (file->f_flags & O_NONBLOCK)
nonblock = 1;
@@ -1896,7 +1864,6 @@ static int snd_pcm_drain(struct snd_pcm_substream *substream,
unlock:
snd_pcm_stream_unlock_irq(substream);
up_read(&snd_pcm_link_rwsem);
- snd_power_unlock(card);
return result;
}
@@ -2798,7 +2765,7 @@ static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
return 0;
}
-static int snd_pcm_common_ioctl1(struct file *file,
+static int snd_pcm_common_ioctl(struct file *file,
struct snd_pcm_substream *substream,
unsigned int cmd, void __user *arg)
{
@@ -2873,6 +2840,21 @@ static int snd_pcm_common_ioctl1(struct file *file,
return -ENOTTY;
}
+static int snd_pcm_common_ioctl1(struct file *file,
+ struct snd_pcm_substream *substream,
+ unsigned int cmd, void __user *arg)
+{
+ struct snd_card *card = substream->pcm->card;
+ int res;
+
+ snd_power_lock(card);
+ res = snd_power_wait(card, SNDRV_CTL_POWER_D0);
+ if (res >= 0)
+ res = snd_pcm_common_ioctl(file, substream, cmd, arg);
+ snd_power_unlock(card);
+ return res;
+}
+
static int snd_pcm_playback_ioctl1(struct file *file,
struct snd_pcm_substream *substream,
unsigned int cmd, void __user *arg)