linux-kernel - [PATCH] [83/106] block, blk-sysfs: Fix an err return path in blk_register

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Date:	Tue, 26 Apr 2011 14:14:05 -0700 (PDT)
From:	Andi Kleen <andi@...stfloor.org>
To:	tailai.ly@...bao.com, jaxboe@...ionio.com, gregkh@...e.de,
	ak@...ux.intel.com, linux-kernel@...r.kernel.org,
	stable@...nel.org, tim.bird@...sony.com
Subject: [PATCH] [83/106] block, blk-sysfs: Fix an err return path in blk_register_queue()

2.6.35-longterm review patch.  If anyone has any objections, please let me know.

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

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: Greg Kroah-Hartman <gregkh@...e.de>
Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---
 block/blk-sysfs.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux-2.6.35.y/block/blk-sysfs.c
===================================================================
--- linux-2.6.35.y.orig/block/blk-sysfs.c
+++ linux-2.6.35.y/block/blk-sysfs.c
@@ -502,8 +502,10 @@ int blk_register_queue(struct gendisk *d
 		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);
 
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