linux-kernel - [PATCH] loop: Properly clear sysfs in autoclear mode

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Date:	Mon, 25 Oct 2010 09:11:38 +0200
From:	Milan Broz <mbroz@...hat.com>
To:	axboe@...nel.dk
Cc:	jeff.chua.linux@...il.com, hch@....de,
	linux-kernel@...r.kernel.org, Milan Broz <mbroz@...hat.com>
Subject: [PATCH] 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@...hat.com>
---
 drivers/block/loop.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 6c48b35..c21d4f3 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1049,9 +1049,9 @@ static int loop_clr_fd(struct loop_device *lo, struct block_device *bdev)
 	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);
 	}
-- 
1.7.2.3

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