[PATCH] mm/backing-dev.c: fix an error handling path in 'cgwb_create()'

[Christophe JAILLET]

If the 'kmalloc' fails, we must go through the existing error handling
path.

Signed-off-by: Christophe JAILLET <christophe.jail...@wanadoo.fr>
---
 mm/backing-dev.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index f028a9a472fd..e19606bb41a0 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -569,8 +569,10 @@ static int cgwb_create(struct backing_dev_info *bdi,
 
        /* need to create a new one */
        wb = kmalloc(sizeof(*wb), gfp);
-       if (!wb)
-               return -ENOMEM;
+       if (!wb) {
+               ret = -ENOMEM;
+               goto out_put;
+       }
 
        ret = wb_init(wb, bdi, blkcg_css->id, gfp);
        if (ret)
-- 
2.11.0