rbd: fix error return code in rbd_dev_device_setup()

Fix to return -ENOMEM from the workqueue alloc error handling
case instead of 0, as done elsewhere in this function.

Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 2cd01ca1b5b4..4b97baf8afa3 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -5088,8 +5088,10 @@ static int rbd_dev_device_setup(struct rbd_device *rbd_dev)
         set_disk_ro(rbd_dev->disk, rbd_dev->mapping.read_only);
 
         rbd_dev->rq_wq = alloc_workqueue("%s", 0, 0, rbd_dev->disk->disk_name);
-        if (!rbd_dev->rq_wq)
+        if (!rbd_dev->rq_wq) {
+                ret = -ENOMEM;
                 goto err_out_mapping;
+        }
 
         ret = rbd_bus_add_dev(rbd_dev);
         if (ret)