drbd: explicitly clear unused dp_flags in drbd_send_block

We send left-over garbage from the previous packet in P_DATA_REPLY and
P_RS_DATA_REPLY packets. That's bad behaviour.

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_main.c b/drivers/block/drbd/drbd_main.c
index 8b99f4e..c312a3b 100644 (file)
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1882,6 +1882,7 @@ int drbd_send_block(struct drbd_conf *mdev, enum drbd_packet cmd,
        p->sector = cpu_to_be64(peer_req->i.sector);
        p->block_id = peer_req->block_id;
        p->seq_num = 0;  /* unused */
+       p->dp_flags = 0;
        if (dgs)
                drbd_csum_ee(mdev, mdev->tconn->integrity_tfm, peer_req, p + 1);
        err = __send_command(mdev->tconn, mdev->vnr, sock, cmd, sizeof(*p) + dgs, NULL, peer_req->i.size);