drbd: Implemented conn_lowest_conn()

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_nl.c b/drivers/block/drbd/drbd_nl.c
index ed08dce..5cf1164 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -1590,7 +1590,7 @@
 
 static int adm_detach(struct drbd_conf *mdev)
 {
-	enum drbd_ret_code retcode;
+	enum drbd_state_rv retcode;
 	drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */
 	retcode = drbd_request_state(mdev, NS(disk, D_DISKLESS));
 	wait_event(mdev->misc_wait,