mlx4_en: dont change mac_header on xmit

A driver xmit function is not allowed to change skb without special
care.

mlx4_en_xmit() should not call skb_reset_mac_header() and instead should
use skb->data to access ethernet header.

This removes a dumb test : if (ethh && ethh->h_dest)

Also remove this slow mlx4_en_mac_to_u64() call, we can use
get_unaligned() to get faster code.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/include/linux/mlx4/qp.h b/include/linux/mlx4/qp.h
index bee8fa23127..091f9e7dc8b 100644
--- a/include/linux/mlx4/qp.h
+++ b/include/linux/mlx4/qp.h
@@ -212,7 +212,10 @@ struct mlx4_wqe_ctrl_seg {
          * [1]   SE (solicited event)
          * [0]   FL (force loopback)
          */
-        __be32                  srcrb_flags;
+        union {
+                __be32                  srcrb_flags;
+                __be16                  srcrb_flags16[2];
+        };
         /*
          * imm is immediate data for send/RDMA write w/ immediate;
          * also invalidation key for send with invalidate; input