ixgbe: remove useless fields in checksum offload

According to Table 7-38: Valid Fields by Offload Option
of Intel ® 82599 10 GbE Controller Datasheet,
L4LEN field is not needed for L4 XSUM computation by the hardware.
So remove l4_len from tx_offload_mask in ixgbe_set_xmit_ctx
function used to build the context transmitted to the hardware.

Signed-off-by: Didier Pallard <didier.pallard@6wind.com>
Signed-off-by: David Marchand <david.marchand@6wind.com>
Acked-by: Wenzhuo Lu <wenzhuo.lu@intel.com>

diff --git a/drivers/net/ixgbe/ixgbe_rxtx.c b/drivers/net/ixgbe/ixgbe_rxtx.c
index 5d7924c..2ba10e4 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_rxtx.c
+++ b/drivers/net/ixgbe/ixgbe_rxtx.c
@@ -415,7 +415,6 @@ ixgbe_set_xmit_ctx(struct ixgbe_tx_queue *txq,
                        mss_l4len_idx |= sizeof(struct tcp_hdr) << IXGBE_ADVTXD_L4LEN_SHIFT;
                        tx_offload_mask.l2_len |= ~0;
                        tx_offload_mask.l3_len |= ~0;
-                       tx_offload_mask.l4_len |= ~0;
                        break;
                case PKT_TX_SCTP_CKSUM:
                        type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_SCTP |