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>

diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 5ddb01e..57cbef2 100644 (file)
--- a/drivers/block/drbd/drbd_req.c
+++ b/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_NET_OK) || !(s & RQ_LOCAL_OK))
-                       drbd_set_out_of_sync(mdev, req->i.sector, req->i.size);
+               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);
+                       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;
        }