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[PATCH 3.14 010/130] bcache: unregister reboot notifier if bcache fails to unregister device

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  [PATCH 3.14 010/130] bcache: unregister reboot notifier if bcache fails to unregister device Greg Kroah-Hartman <gregkh@linuxfoundation.org> - 2016-03-02 03:20 +0100

#1347641 — [PATCH 3.14 010/130] bcache: unregister reboot notifier if bcache fails to unregister device

3.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Zheng Liu <wenqing.lz@taobao.com>

commit 2ecf0cdb2b437402110ab57546e02abfa68a716b upstream.

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>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/md/bcache/super.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -2086,8 +2086,10 @@ 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)) ||

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