diff options
| -rw-r--r-- | sound/core/timer.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/core/timer.c b/sound/core/timer.c index 3476895ee..f5ddc9bb4 100644 --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -1922,19 +1922,23 @@ static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, if (err < 0) goto _error; + mutex_lock(&tu->ioctl_lock); if (tu->tread) { if (copy_to_user(buffer, &tu->tqueue[tu->qhead++], sizeof(struct snd_timer_tread))) { + mutex_unlock(&tu->ioctl_lock); err = -EFAULT; goto _error; } } else { if (copy_to_user(buffer, &tu->queue[tu->qhead++], sizeof(struct snd_timer_read))) { + mutex_unlock(&tu->ioctl_lock); err = -EFAULT; goto _error; } } + mutex_unlock(&tu->ioctl_lock); tu->qhead %= tu->queue_size; |