drbd: Fix postponed requests

* Postponed requests should not set or clear out-of-sync marks
* When a request gets postponed we need to drop its reference
  mdev->local_cnt (put_ldev()).

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

drivers/block/drbd/drbd_req.c

@@ -123,11 +123,13 @@ void drbd_req_destroy(struct kref *kref)
 		 * (local only or remote failed).
 		 * Other places where we set out-of-sync:
 		 * READ with local io-error */
+		if (!(s & RQ_POSTPONED)) {
 			if (!(s & RQ_NET_OK) || !(s & RQ_LOCAL_OK))
 				drbd_set_out_of_sync(mdev, req->i.sector, req->i.size);
 
 			if ((s & RQ_NET_OK) && (s & RQ_LOCAL_OK) && (s & RQ_NET_SIS))
 				drbd_set_in_sync(mdev, req->i.sector, req->i.size);
+		}
 
 		/* one might be tempted to move the drbd_al_complete_io
 		 * to the local io completion callback drbd_request_endio.
@@ -1046,6 +1048,7 @@ void __drbd_make_request(struct drbd_conf *mdev, struct bio *bio, unsigned long
 		if (req->private_bio) {
 			bio_put(req->private_bio);
 			req->private_bio = NULL;
+			put_ldev(mdev);
 		}
 		goto out;
 	}