[PATCH] block: rnbd: rnbd-srv: silence uninitialized variable warning

[Brooke Basile]

Clang warns:
        drivers/block/rnbd/rnbd-srv.c:150:6: warning: variable 'err' is used
        uninitialized whenever 'if' condition is true 
[-Wsometimes-uninitialized]
                if (IS_ERR(bio)) {
                ^~~~~~~~~~~
        drivers/block/rnbd/rnbd-srv.c:177:9: note: uninitialized use occurs here
                return err;
                ^~~
        drivers/block/rnbd/rnbd-srv.c:126:9: note: initialize the variable 'err'
        to silence this warning
                int err;
                ^
                        = 0

Silence this by replacing `err` with `ret`, returning ret = 0 upon
success.

Signed-off-by: Brooke Basile <brookebas...@gmail.com>
---
 drivers/block/rnbd/rnbd-srv.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c
index 0fb94843a495..f515d1a048a9 100644
--- a/drivers/block/rnbd/rnbd-srv.c
+++ b/drivers/block/rnbd/rnbd-srv.c
@@ -123,10 +123,10 @@ static int process_rdma(struct rtrs_srv *sess,
        struct rnbd_io_private *priv;
        struct rnbd_srv_sess_dev *sess_dev;
        u32 dev_id;
-       int err;
        struct rnbd_dev_blk_io *io;
        struct bio *bio;
        short prio;
+       int ret = 0;
 
        priv = kmalloc(sizeof(*priv), GFP_KERNEL);
        if (!priv)
@@ -138,7 +138,7 @@ static int process_rdma(struct rtrs_srv *sess,
        if (IS_ERR(sess_dev)) {
                pr_err_ratelimited("Got I/O request on session %s for unknown 
device id %d\n",
                                   srv_sess->sessname, dev_id);
-               err = -ENOTCONN;
+               ret = -ENOTCONN;
                goto err;
        }
 
@@ -168,13 +168,13 @@ static int process_rdma(struct rtrs_srv *sess,
 
        submit_bio(bio);
 
-       return 0;
+       return ret;
 
 sess_dev_put:
        rnbd_put_sess_dev(sess_dev);
 err:
        kfree(priv);
-       return err;
+       return ret;
 }
 
 static void destroy_device(struct rnbd_srv_dev *dev)
-- 
2.28.0