[IPV6]: Correct CHECKSUM_HW handling in tcp_v6_send_check.

c667ab2c · Alexey Kuznetsov · David S. Miller · 5e1dcb06 · c667ab2c
Commit c667ab2c authored Mar 20, 2003 by Alexey Kuznetsov Committed by David S. Miller Mar 20, 2003
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net/ipv6/tcp_ipv6.c net/ipv6/tcp_ipv6.c +1 -1

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--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -967,7 +967,7 @@ static void tcp_v6_send_check(struct sock *sk, struct tcphdr *th, int len,
 	struct ipv6_pinfo *np = inet6_sk(sk);

 	if (skb->ip_summed == CHECKSUM_HW) {
-		th->check = csum_ipv6_magic(&np->saddr, &np->daddr, len, IPPROTO_TCP,  0);
+		th->check = ~csum_ipv6_magic(&np->saddr, &np->daddr, len, IPPROTO_TCP,  0);
 		skb->csum = offsetof(struct tcphdr, check);
 	} else {
 		th->check = csum_ipv6_magic(&np->saddr, &np->daddr, len, IPPROTO_TCP,