From 96c50caa5148e0e0a077672574785700885c6764 Mon Sep 17 00:00:00 2001 From: Nimrod Andy 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 Signed-off-by: David S. Miller --- drivers/net/ethernet/freescale/fec_main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c index ee8e5477c819..55b55d2f73bc 100644 --- a/drivers/net/ethernet/freescale/fec_main.c +++ b/drivers/net/ethernet/freescale/fec_main.c @@ -314,6 +314,7 @@ fec_enet_clear_csum(struct sk_buff *skb, struct net_device *ndev) if (unlikely(skb_cow_head(skb, 0))) return -1; + ip_hdr(skb)->check = 0; *(__sum16 *)(skb->head + skb->csum_start + skb->csum_offset) = 0; return 0; @@ -395,7 +396,7 @@ static int txq_submit_skb(struct sk_buff *skb, struct net_device *ndev) * are done by the kernel */ if (skb->ip_summed == CHECKSUM_PARTIAL) - ebdp->cbd_esc |= BD_ENET_TX_PINS; + ebdp->cbd_esc |= BD_ENET_TX_PINS | BD_ENET_TX_IINS; } } -- 2.30.2