[PATCH] IB: RMPP fixes

- Fix payload length of middle RMPP sent segments. Middle payload
  lengths should be 0 on the send side.

  (This is perhaps a compliance and should not be an interop issue as
  middle payload lengths are supposed to be ignored on receive).

- Fix length in first segment of multipacket sends

  (This is a compliance issue but does not affect at least OpenIB to
  OpenIB RMPP transfers).

Signed-off-by: Hal Rosenstock <halr@voltaire.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/infiniband/core/mad_rmpp.c b/drivers/infiniband/core/mad_rmpp.c
index 43fd805e0265..2bd8b1cc57c4 100644
--- a/drivers/infiniband/core/mad_rmpp.c
+++ b/drivers/infiniband/core/mad_rmpp.c
@@ -593,7 +593,8 @@ static int send_next_seg(struct ib_mad_send_wr_private *mad_send_wr)
                 rmpp_mad->rmpp_hdr.paylen_newwin =
                         cpu_to_be32(mad_send_wr->total_seg *
                                     (sizeof(struct ib_rmpp_mad) -
-                                       offsetof(struct ib_rmpp_mad, data)));
+                                       offsetof(struct ib_rmpp_mad, data)) -
+                                    mad_send_wr->pad);
                 mad_send_wr->sg_list[0].length = sizeof(struct ib_rmpp_mad);
         } else {
                 mad_send_wr->send_wr.num_sge = 2;
@@ -602,6 +603,7 @@ static int send_next_seg(struct ib_mad_send_wr_private *mad_send_wr)
                 mad_send_wr->sg_list[1].length = sizeof(struct ib_rmpp_mad) -
                                                  mad_send_wr->data_offset;
                 mad_send_wr->sg_list[1].lkey = mad_send_wr->sg_list[0].lkey;
+                rmpp_mad->rmpp_hdr.paylen_newwin = 0;
         }
 
         if (mad_send_wr->seg_num == mad_send_wr->total_seg) {