drbd: Global_state_lock not necessary here...

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c
index f34e7d4..8c49ca8 100644
--- a/drivers/block/drbd/drbd_state.c
+++ b/drivers/block/drbd/drbd_state.c
@@ -1375,8 +1375,6 @@
 	struct after_conn_state_chg_work *acscw;
 	enum drbd_conns oc = tconn->cstate;
 
-	read_lock(&global_state_lock);
-
 	rv = is_valid_conn_transition(oc, val.conn);
 	if (rv < SS_SUCCESS)
 		goto abort;
@@ -1418,8 +1416,6 @@
 	}
 
 abort:
-	read_unlock(&global_state_lock);
-
 	return rv;
 }