linux-kernel - [34-longterm 086/196] block, blk-sysfs: Fix an err return path in blk_register

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Date:	Mon, 12 Mar 2012 20:19:59 -0400
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	stable@...nel.org, linux-kernel@...r.kernel.org
Cc:	stable-review@...nel.org, Liu Yuan <tailai.ly@...bao.com>,
	Jens Axboe <jaxboe@...ionio.com>,
	Paul Gortmaker <paul.gortmaker@...driver.com>
Subject: [34-longterm 086/196] block, blk-sysfs: Fix an err return path in blk_register_queue()

From: Liu Yuan <tailai.ly@...bao.com>

                   -------------------
    This is a commit scheduled for the next v2.6.34 longterm release.
    If you see a problem with using this for longterm, please comment.
                   -------------------

commit ed5302d3c25006a9edc7a7fbea97a30483f89ef7 upstream.

We do not call blk_trace_remove_sysfs() in err return path
if kobject_add() fails. This path fixes it.

Signed-off-by: Liu Yuan <tailai.ly@...bao.com>
Signed-off-by: Jens Axboe <jaxboe@...ionio.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@...driver.com>
---
 block/blk-sysfs.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index d246654..3eede79 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -502,8 +502,10 @@ int blk_register_queue(struct gendisk *disk)
 		return ret;
 
 	ret = kobject_add(&q->kobj, kobject_get(&dev->kobj), "%s", "queue");
-	if (ret < 0)
+	if (ret < 0) {
+		blk_trace_remove_sysfs(dev);
 		return ret;
+	}
 
 	kobject_uevent(&q->kobj, KOBJ_ADD);
 
-- 
1.7.9.3

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