block: drbd: remove a stray unlock in __drbd_send_protocol()

[ Upstream commit 8e9c523016cf9983b295e4bc659183d1fa6ef8e0 ]

There are two callers of this function and they both unlock the mutex so
this ends up being a double unlock.

Fixes: 44ed167da748 ("drbd: rcu_read_lock() and rcu_dereference() for tconn->net_conf")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index ef8212a..a49a8d9 100644 (file)
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -796,7 +796,6 @@ int __drbd_send_protocol(struct drbd_connection *connection, enum drbd_packet cm
 
        if (nc->tentative && connection->agreed_pro_version < 92) {
                rcu_read_unlock();
-               mutex_unlock(&sock->mutex);
                drbd_err(connection, "--dry-run is not supported by peer");
                return -EOPNOTSUPP;
        }