From: Zheng Liu <wenqing.lz@taobao.com>
Date: Mon, 30 Nov 2015 01:21:57 +0000 (-0800)
Subject: bcache: unregister reboot notifier if bcache fails to unregister device
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=2ecf0cdb2b437402110ab57546e02abfa68a716b;p=linux-beck.git

bcache: unregister reboot notifier if bcache fails to unregister device

In bcache_init() function it forgot to unregister reboot notifier if
bcache fails to unregister a block device.  This commit fixes this.

Signed-off-by: Zheng Liu <wenqing.lz@taobao.com>
Tested-by: Joshua Schmid <jschmid@suse.com>
Tested-by: Eric Wheeler <bcache@linux.ewheeler.net>
Cc: Kent Overstreet <kmo@daterainc.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>
---

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 43e911e4e8d0..18f14a246d70 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -2071,8 +2071,10 @@ static int __init bcache_init(void)
 	closure_debug_init();
 
 	bcache_major = register_blkdev(0, "bcache");
-	if (bcache_major < 0)
+	if (bcache_major < 0) {
+		unregister_reboot_notifier(&reboot);
 		return bcache_major;
+	}
 
 	if (!(bcache_wq = create_workqueue("bcache")) ||
 	    !(bcache_kobj = kobject_create_and_add("bcache", fs_kobj)) ||