From 96c50caa5148e0e0a077672574785700885c6764 Mon Sep 17 00:00:00 2001
From: Nimrod Andy <B38611@freescale.com>
Date: Thu, 12 Jun 2014 08:16:19 +0800
Subject: [PATCH] net: fec: Enable IP header hardware checksum

IP header checksum is calcalated by network layer in default.
To support software TSO, it is better to use HW calculate the
IP header checksum.

FEC hw checksum feature request the checksum field in frame
is zero, otherwise the calculative CRC is not correct.

For segmentated TCP packet, HW calculate the IP header checksum again,
it doesn't bring any impact. For SW TSO, HW calculated checksum bring
better performance.

Signed-off-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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