diff options
| -rw-r--r-- | sound/core/control_compat.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/sound/core/control_compat.c b/sound/core/control_compat.c index 3fd7f67e701e..f1df25922bd7 100644 --- a/sound/core/control_compat.c +++ b/sound/core/control_compat.c @@ -320,8 +320,11 @@ static int ctl_elem_read_user(struct snd_card *card, snd_power_lock(card); err = snd_power_wait(card, SNDRV_CTL_POWER_D0); - if (err >= 0) + if (err >= 0) { + down_read(&card->controls_rwsem); err = snd_ctl_elem_read(card, data); + up_read(&card->controls_rwsem); + } snd_power_unlock(card); if (err >= 0) err = copy_ctl_value_to_user(userdata, valuep, data, @@ -349,8 +352,11 @@ static int ctl_elem_write_user(struct snd_ctl_file *file, snd_power_lock(card); err = snd_power_wait(card, SNDRV_CTL_POWER_D0); - if (err >= 0) + if (err >= 0) { + down_write(&card->controls_rwsem); err = snd_ctl_elem_write(card, file, data); + up_write(&card->controls_rwsem); + } snd_power_unlock(card); if (err >= 0) err = copy_ctl_value_to_user(userdata, valuep, data, |