drbd: Do not drop net config if sending in drbd_send_protocol() fails

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

drivers/block/drbd/drbd_main.c

@@ -1967,7 +1967,7 @@ int drbd_send_protocol(struct drbd_conf *mdev)
 		else {
 			dev_err(DEV, "--dry-run is not supported by peer");
 			kfree(p);
-			return 0;
+			return -1;
 		}
 	}
 	p->conn_flags    = cpu_to_be32(cf);

drivers/block/drbd/drbd_receiver.c

@@ -906,7 +906,7 @@ retry:
 		put_ldev(mdev);
 	}
 
-	if (!drbd_send_protocol(mdev))
+	if (drbd_send_protocol(mdev) == -1)
 		return -1;
 	drbd_send_sync_param(mdev, &mdev->sync_conf);
 	drbd_send_sizes(mdev, 0, 0);