loop: mutex already unlocked in loop_clr_fd()
mount/1865 is trying to release lock (&lo->lo_ctl_mutex) at:
but there are no more locks to release!
mutex is already unlocked in loop_clr_fd(), we should not
try to unlock it in lo_release() again.
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 40b17d3..ddae808 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1431,6 +1431,7 @@
static int lo_release(struct gendisk *disk, fmode_t mode)
{
struct loop_device *lo = disk->private_data;
+ int err;
mutex_lock(&lo->lo_ctl_mutex);
@@ -1442,7 +1443,9 @@
* In autoclear mode, stop the loop thread
* and remove configuration after last close.
*/
- loop_clr_fd(lo, NULL);
+ err = loop_clr_fd(lo, NULL);
+ if (!err)
+ goto out_unlocked;
} else {
/*
* Otherwise keep thread (if running) and config,
@@ -1453,7 +1456,7 @@
out:
mutex_unlock(&lo->lo_ctl_mutex);
-
+out_unlocked:
return 0;
}