From: Alexey Dobriyan <adobriyan@gmail.com>

If register_filesystem() fails mux workqueue must be killed.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Ron Minnich <rminnich@lanl.gov>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 fs/9p/v9fs.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff -puN fs/9p/v9fs.c~9p-fix-leak-on-error-path fs/9p/v9fs.c
--- a/fs/9p/v9fs.c~9p-fix-leak-on-error-path
+++ a/fs/9p/v9fs.c
@@ -460,8 +460,10 @@ static int __init init_v9fs(void)
 
 	ret = v9fs_mux_global_init();
 	if (!ret)
-		ret = register_filesystem(&v9fs_fs_type);
-
+		return ret;
+	ret = register_filesystem(&v9fs_fs_type);
+	if (!ret)
+		v9fs_mux_global_exit();
 	return ret;
 }
 
_