commit 51a0bb0c2e614659132fce272c8a1815a12c5c2a
author Milan Broz <mbroz@redhat.com> Wed Oct 27 19:51:30 2010 -0600
committer Jens Axboe <jaxboe@fusionio.com> Wed Oct 27 19:51:30 2010 -0600
tree 93554b329e8e6cd9378641422dea4245c05a98dd
parent 12ba8d1e9262ce81a695795410bd9ee5c9407ba1

loop: Properly clear sysfs in autoclear mode

In autoclear mode bdev is NULL but the sysfs
entry should be destroyed otherwise this warning appears:

WARNING: at fs/sysfs/dir.c:451 sysfs_add_one+0x82/0x95()
sysfs: cannot create duplicate filename '/devices/virtual/block/loop0/loop'

Fixes commit ee86273062cbb310665fe49e1f1937d2cf85b0b9

Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>

drivers/block/loop.c

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 450c958..1e5284ef 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1049,9 +1049,9 @@
 	if (bdev)
 		invalidate_bdev(bdev);
 	set_capacity(lo->lo_disk, 0);
+	loop_sysfs_exit(lo);
 	if (bdev) {
 		bd_set_size(bdev, 0);
-		loop_sysfs_exit(lo);
 		/* let user-space know about this change */
 		kobject_uevent(&disk_to_dev(bdev->bd_disk)->kobj, KOBJ_CHANGE);
 	}