drbd: Allow online layout change of AL while peer is not connected

If a user forces the operation he takes the blame in case
the peer does not have enough space. No reason to dey this...

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index e891cb0..d219210 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -2489,7 +2489,7 @@
 			goto fail_ldev;
 		}
 
-		if (device->state.conn != C_CONNECTED) {
+		if (device->state.conn != C_CONNECTED && !rs.resize_force) {
 			retcode = ERR_MD_LAYOUT_CONNECTED;
 			goto fail_ldev;
 		}