rbd: silence bogus uninitialized use warning in rbd_acquire_lock()

  drivers/block/rbd.c: In function 'rbd_acquire_lock':
  drivers/block/rbd.c:3602:44: error: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized]

Silence the warning, found it when built old kernel(3.10) with
OBS(opensuse build service).

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index b008b6a980980ab56a82bc8b35f388b971b294aa..b640ad8a6d206714b1c0f3042916b15340e01ecc 100644 (file)
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -3435,7 +3435,7 @@ static void rbd_acquire_lock(struct work_struct *work)
        struct rbd_device *rbd_dev = container_of(to_delayed_work(work),
                                            struct rbd_device, lock_dwork);
        enum rbd_lock_state lock_state;
-       int ret;
+       int ret = 0;
 
        dout("%s rbd_dev %p\n", __func__, rbd_dev);
 again: