From: Liu Yuan <tailai.ly@taobao.com>
Date: Tue, 19 Apr 2011 11:47:58 +0000 (+0200)
Subject: block, blk-sysfs: Fix an err return path in blk_register_queue()
X-Git-Tag: firefly_0821_release~10186^2~166
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=752bdca00326ad699ede9f92b3a5978e13f1fe45;p=firefly-linux-kernel-4.4.55.git

block, blk-sysfs: Fix an err return path in blk_register_queue()

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@taobao.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 8a6d81afb284..bb9c5ea9ca6c 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -440,8 +440,10 @@ 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);