From: David S. Miller <davem@davemloft.net>
Date: Wed, 21 Apr 2010 21:59:20 +0000 (-0700)
Subject: tcp: Mark v6 response packets as CHECKSUM_PARTIAL
X-Git-Tag: v2.6.35-rc1~473^2~428
X-Git-Url: http://ftp.safe.ca/?p=safe%2Fjmp%2Flinux-2.6;a=commitdiff_plain;h=e5700aff144fbbba46be40049f0c55fb57283777

tcp: Mark v6 response packets as CHECKSUM_PARTIAL

Otherwise we only get the checksum right for data-less TCP responses.

Noticed by Herbert Xu.

Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 5d2e430..1ababbb 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1054,6 +1054,9 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
 	ipv6_addr_copy(&fl.fl6_dst, &ipv6_hdr(skb)->saddr);
 	ipv6_addr_copy(&fl.fl6_src, &ipv6_hdr(skb)->daddr);
 
+	buff->ip_summed = CHECKSUM_PARTIAL;
+	buff->csum = 0;
+
 	__tcp_v6_send_check(buff, &fl.fl6_src, &fl.fl6_dst);
 
 	fl.proto = IPPROTO_TCP;