drbd: only generate and send a new sync uuid after a successful state change

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

drivers/block/drbd/drbd_worker.c

@@ -1544,6 +1544,11 @@ void drbd_start_resync(struct drbd_conf *mdev, enum drbd_conns side)
 	}
 	write_unlock_irq(&global_state_lock);
 
+	if (r == SS_SUCCESS) {
+		dev_info(DEV, "Began resync as %s (will sync %lu KB [%lu bits set]).\n",
+		     drbd_conn_str(ns.conn),
+		     (unsigned long) mdev->rs_total << (BM_BLOCK_SHIFT-10),
+		     (unsigned long) mdev->rs_total);
 		if (side == C_SYNC_TARGET)
 			mdev->bm_resync_fo = 0;
 
@@ -1557,12 +1562,6 @@ void drbd_start_resync(struct drbd_conf *mdev, enum drbd_conns side)
 		if (side == C_SYNC_SOURCE && mdev->agreed_pro_version < 96)
 			drbd_gen_and_send_sync_uuid(mdev);
 
-	if (r == SS_SUCCESS) {
-		dev_info(DEV, "Began resync as %s (will sync %lu KB [%lu bits set]).\n",
-		     drbd_conn_str(ns.conn),
-		     (unsigned long) mdev->rs_total << (BM_BLOCK_SHIFT-10),
-		     (unsigned long) mdev->rs_total);
-
 		if (mdev->agreed_pro_version < 95 && mdev->rs_total == 0) {
 			/* This still has a race (about when exactly the peers
 			 * detect connection loss) that can lead to a full sync