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-rw-r--r--include/sound/core.h13
-rw-r--r--sound/core/control.c58
-rw-r--r--sound/core/control_compat.c34
-rw-r--r--sound/core/init.c5
-rw-r--r--sound/core/pcm_native.c30
-rw-r--r--sound/soc/soc-core.c2
6 files changed, 53 insertions, 89 deletions
diff --git a/include/sound/core.h b/include/sound/core.h
index 357f36b5ee80..4104a9d1001f 100644
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -136,7 +136,6 @@ struct snd_card {
#ifdef CONFIG_PM
unsigned int power_state; /* power state */
- struct mutex power_lock; /* power lock */
wait_queue_head_t power_sleep;
#endif
@@ -149,16 +148,6 @@ struct snd_card {
#define dev_to_snd_card(p) container_of(p, struct snd_card, card_dev)
#ifdef CONFIG_PM
-static inline void snd_power_lock(struct snd_card *card)
-{
- mutex_lock(&card->power_lock);
-}
-
-static inline void snd_power_unlock(struct snd_card *card)
-{
- mutex_unlock(&card->power_lock);
-}
-
static inline unsigned int snd_power_get_state(struct snd_card *card)
{
return card->power_state;
@@ -175,8 +164,6 @@ int snd_power_wait(struct snd_card *card, unsigned int power_state);
#else /* ! CONFIG_PM */
-#define snd_power_lock(card) do { (void)(card); } while (0)
-#define snd_power_unlock(card) do { (void)(card); } while (0)
static inline int snd_power_wait(struct snd_card *card, unsigned int state) { return 0; }
#define snd_power_get_state(card) ({ (void)(card); SNDRV_CTL_POWER_D0; })
#define snd_power_change_state(card, state) do { (void)(card); } while (0)
diff --git a/sound/core/control.c b/sound/core/control.c
index 51d4b4ad3e1d..56b3e2d49c82 100644
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -864,14 +864,14 @@ static int snd_ctl_elem_info_user(struct snd_ctl_file *ctl,
if (copy_from_user(&info, _info, sizeof(info)))
return -EFAULT;
- snd_power_lock(ctl->card);
result = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);
- if (result >= 0)
- result = snd_ctl_elem_info(ctl, &info);
- snd_power_unlock(ctl->card);
- if (result >= 0)
- if (copy_to_user(_info, &info, sizeof(info)))
- return -EFAULT;
+ if (result < 0)
+ return result;
+ result = snd_ctl_elem_info(ctl, &info);
+ if (result < 0)
+ return result;
+ if (copy_to_user(_info, &info, sizeof(info)))
+ return -EFAULT;
return result;
}
@@ -905,17 +905,19 @@ static int snd_ctl_elem_read_user(struct snd_card *card,
if (IS_ERR(control))
return PTR_ERR(control);
- snd_power_lock(card);
result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
- if (result >= 0) {
- down_read(&card->controls_rwsem);
- result = snd_ctl_elem_read(card, control);
- up_read(&card->controls_rwsem);
- }
- snd_power_unlock(card);
- if (result >= 0)
- if (copy_to_user(_control, control, sizeof(*control)))
- result = -EFAULT;
+ if (result < 0)
+ goto error;
+
+ down_read(&card->controls_rwsem);
+ result = snd_ctl_elem_read(card, control);
+ up_read(&card->controls_rwsem);
+ if (result < 0)
+ goto error;
+
+ if (copy_to_user(_control, control, sizeof(*control)))
+ result = -EFAULT;
+ error:
kfree(control);
return result;
}
@@ -964,17 +966,19 @@ static int snd_ctl_elem_write_user(struct snd_ctl_file *file,
return PTR_ERR(control);
card = file->card;
- snd_power_lock(card);
result = snd_power_wait(card, SNDRV_CTL_POWER_D0);
- if (result >= 0) {
- down_write(&card->controls_rwsem);
- result = snd_ctl_elem_write(card, file, control);
- up_write(&card->controls_rwsem);
- }
- snd_power_unlock(card);
- if (result >= 0)
- if (copy_to_user(_control, control, sizeof(*control)))
- result = -EFAULT;
+ if (result < 0)
+ goto error;
+
+ down_write(&card->controls_rwsem);
+ result = snd_ctl_elem_write(card, file, control);
+ up_write(&card->controls_rwsem);
+ if (result < 0)
+ goto error;
+
+ if (copy_to_user(_control, control, sizeof(*control)))
+ result = -EFAULT;
+ error:
kfree(control);
return result;
}
diff --git a/sound/core/control_compat.c b/sound/core/control_compat.c
index 1fa70766ffab..a848836a5de0 100644
--- a/sound/core/control_compat.c
+++ b/sound/core/control_compat.c
@@ -111,12 +111,10 @@ static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl,
if (get_user(data->value.enumerated.item, &data32->value.enumerated.item))
goto error;
- snd_power_lock(ctl->card);
err = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);
- if (err >= 0)
- err = snd_ctl_elem_info(ctl, data);
- snd_power_unlock(ctl->card);
-
+ if (err < 0)
+ goto error;
+ err = snd_ctl_elem_info(ctl, data);
if (err < 0)
goto error;
/* restore info to 32bit */
@@ -315,14 +313,13 @@ static int ctl_elem_read_user(struct snd_card *card,
if (err < 0)
goto error;
- snd_power_lock(card);
err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
- if (err >= 0)
- err = snd_ctl_elem_read(card, data);
- snd_power_unlock(card);
- if (err >= 0)
- err = copy_ctl_value_to_user(userdata, valuep, data,
- type, count);
+ if (err < 0)
+ goto error;
+ err = snd_ctl_elem_read(card, data);
+ if (err < 0)
+ goto error;
+ err = copy_ctl_value_to_user(userdata, valuep, data, type, count);
error:
kfree(data);
return err;
@@ -344,14 +341,13 @@ static int ctl_elem_write_user(struct snd_ctl_file *file,
if (err < 0)
goto error;
- snd_power_lock(card);
err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
- if (err >= 0)
- err = snd_ctl_elem_write(card, file, data);
- snd_power_unlock(card);
- if (err >= 0)
- err = copy_ctl_value_to_user(userdata, valuep, data,
- type, count);
+ if (err < 0)
+ goto error;
+ err = snd_ctl_elem_write(card, file, data);
+ if (err < 0)
+ goto error;
+ err = copy_ctl_value_to_user(userdata, valuep, data, type, count);
error:
kfree(data);
return err;
diff --git a/sound/core/init.c b/sound/core/init.c
index 6e219dc23f96..32ebe2f6bc59 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -253,7 +253,6 @@ int snd_card_new(struct device *parent, int idx, const char *xid,
spin_lock_init(&card->files_lock);
INIT_LIST_HEAD(&card->files_list);
#ifdef CONFIG_PM
- mutex_init(&card->power_lock);
init_waitqueue_head(&card->power_sleep);
#endif
@@ -978,8 +977,6 @@ EXPORT_SYMBOL(snd_card_file_remove);
* Waits until the power-state is changed.
*
* Return: Zero if successful, or a negative error code.
- *
- * Note: the power lock must be active before call.
*/
int snd_power_wait(struct snd_card *card, unsigned int power_state)
{
@@ -999,9 +996,7 @@ int snd_power_wait(struct snd_card *card, unsigned int power_state)
if (snd_power_get_state(card) == power_state)
break;
set_current_state(TASK_UNINTERRUPTIBLE);
- snd_power_unlock(card);
schedule_timeout(30 * HZ);
- snd_power_lock(card);
}
remove_wait_queue(&card->power_sleep, &wait);
return result;
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index cf0433f80067..621142ea9ec6 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -1830,7 +1830,6 @@ static int snd_pcm_drain(struct snd_pcm_substream *substream,
add_wait_queue(&to_check->sleep, &wait);
snd_pcm_stream_unlock_irq(substream);
up_read(&snd_pcm_link_rwsem);
- snd_power_unlock(card);
if (runtime->no_period_wakeup)
tout = MAX_SCHEDULE_TIMEOUT;
else {
@@ -1842,7 +1841,6 @@ static int snd_pcm_drain(struct snd_pcm_substream *substream,
tout = msecs_to_jiffies(tout * 1000);
}
tout = schedule_timeout_interruptible(tout);
- snd_power_lock(card);
down_read(&snd_pcm_link_rwsem);
snd_pcm_stream_lock_irq(substream);
remove_wait_queue(&to_check->sleep, &wait);
@@ -2764,11 +2762,16 @@ static int snd_pcm_tstamp(struct snd_pcm_substream *substream, int __user *_arg)
return 0;
}
-static int snd_pcm_common_ioctl(struct file *file,
+static int snd_pcm_common_ioctl1(struct file *file,
struct snd_pcm_substream *substream,
unsigned int cmd, void __user *arg)
{
struct snd_pcm_file *pcm_file = file->private_data;
+ int res;
+
+ res = snd_power_wait(substream->pcm->card, SNDRV_CTL_POWER_D0);
+ if (res < 0)
+ return res;
switch (cmd) {
case SNDRV_PCM_IOCTL_PVERSION:
@@ -2846,21 +2849,6 @@ static int snd_pcm_common_ioctl(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)
@@ -3064,7 +3052,6 @@ int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
{
snd_pcm_uframes_t *frames = arg;
snd_pcm_sframes_t result;
- int err;
switch (cmd) {
case SNDRV_PCM_IOCTL_FORWARD:
@@ -3084,10 +3071,7 @@ int snd_pcm_kernel_ioctl(struct snd_pcm_substream *substream,
case SNDRV_PCM_IOCTL_START:
return snd_pcm_start_lock_irq(substream);
case SNDRV_PCM_IOCTL_DRAIN:
- snd_power_lock(substream->pcm->card);
- err = snd_pcm_drain(substream, NULL);
- snd_power_unlock(substream->pcm->card);
- return err;
+ return snd_pcm_drain(substream, NULL);
case SNDRV_PCM_IOCTL_DROP:
return snd_pcm_drop(substream);
case SNDRV_PCM_IOCTL_DELAY:
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 13c875e2392a..62c11e26ce5c 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -653,9 +653,7 @@ int snd_soc_suspend(struct device *dev)
/* Due to the resume being scheduled into a workqueue we could
* suspend before that's finished - wait for it to complete.
*/
- snd_power_lock(card->snd_card);
snd_power_wait(card->snd_card, SNDRV_CTL_POWER_D0);
- snd_power_unlock(card->snd_card);
/* we're going to block userspace touching us until resume completes */
snd_power_change_state(card->snd_card, SNDRV_CTL_POWER_D3hot);
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-26 19:16:25 +0000