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author | Dave Airlie <airlied@redhat.com> | 2017-06-16 13:58:27 +1000 |
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committer | Dave Airlie <airlied@redhat.com> | 2017-06-16 13:58:27 +1000 |
commit | 925344ccc91d7a7fd84cab2dece1c34bbd86fd8c (patch) | |
tree | bd4110dc5a3b70a5674b9d6d5340cc1889f5d6e8 /sound/core/timer.c | |
parent | a6821698918a579e7219d706092e83f367f01ba2 (diff) | |
parent | 32c1431eea4881a6b17bd7c639315010aeefa452 (diff) | |
download | linux-stable-925344ccc91d7a7fd84cab2dece1c34bbd86fd8c.tar.gz linux-stable-925344ccc91d7a7fd84cab2dece1c34bbd86fd8c.tar.bz2 linux-stable-925344ccc91d7a7fd84cab2dece1c34bbd86fd8c.zip |
BackMerge tag 'v4.12-rc5' into drm-next
Linux 4.12-rc5 for nouveau fixes
Diffstat (limited to 'sound/core/timer.c')
-rw-r--r-- | sound/core/timer.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sound/core/timer.c b/sound/core/timer.c index 2f836ca09860..cd67d1c12cf1 100644 --- a/sound/core/timer.c +++ b/sound/core/timer.c @@ -1618,6 +1618,7 @@ static int snd_timer_user_tselect(struct file *file, if (err < 0) goto __err; + tu->qhead = tu->qtail = tu->qused = 0; kfree(tu->queue); tu->queue = NULL; kfree(tu->tqueue); @@ -1959,6 +1960,7 @@ static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, tu = file->private_data; unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); + mutex_lock(&tu->ioctl_lock); spin_lock_irq(&tu->qlock); while ((long)count - result >= unit) { while (!tu->qused) { @@ -1974,7 +1976,9 @@ static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, add_wait_queue(&tu->qchange_sleep, &wait); spin_unlock_irq(&tu->qlock); + mutex_unlock(&tu->ioctl_lock); schedule(); + mutex_lock(&tu->ioctl_lock); spin_lock_irq(&tu->qlock); remove_wait_queue(&tu->qchange_sleep, &wait); @@ -1994,7 +1998,6 @@ static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, tu->qused--; spin_unlock_irq(&tu->qlock); - mutex_lock(&tu->ioctl_lock); if (tu->tread) { if (copy_to_user(buffer, &tu->tqueue[qhead], sizeof(struct snd_timer_tread))) @@ -2004,7 +2007,6 @@ static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, sizeof(struct snd_timer_read))) err = -EFAULT; } - mutex_unlock(&tu->ioctl_lock); spin_lock_irq(&tu->qlock); if (err < 0) @@ -2014,6 +2016,7 @@ static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, } _error: spin_unlock_irq(&tu->qlock); + mutex_unlock(&tu->ioctl_lock); return result > 0 ? result : err; } |