From ebbe495f19d565bb39be31ca28126a222b6a66dd Mon Sep 17 00:00:00 2001
From: WANG Cong <xiyou.wangcong@gmail.com>
Date: Mon, 2 Jun 2014 16:12:02 -0700
Subject: ipv4: use skb frags api in udp4_hwcsum()
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/ipv4/udp.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
(limited to 'net/ipv4')
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 8d8c33d84c9a..185ed3e59802 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -727,13 +727,12 @@ EXPORT_SYMBOL(udp_flush_pending_frames);
void udp4_hwcsum(struct sk_buff *skb, __be32 src, __be32 dst)
{
struct udphdr *uh = udp_hdr(skb);
- struct sk_buff *frags = skb_shinfo(skb)->frag_list;
int offset = skb_transport_offset(skb);
int len = skb->len - offset;
int hlen = len;
__wsum csum = 0;
- if (!frags) {
+ if (!skb_has_frag_list(skb)) {
/*
* Only one fragment on the socket.
*/
@@ -742,15 +741,17 @@ void udp4_hwcsum(struct sk_buff *skb, __be32 src, __be32 dst)
uh->check = ~csum_tcpudp_magic(src, dst, len,
IPPROTO_UDP, 0);
} else {
+ struct sk_buff *frags;
+
/*
* HW-checksum won't work as there are two or more
* fragments on the socket so that all csums of sk_buffs
* should be together
*/
- do {
+ skb_walk_frags(skb, frags) {
csum = csum_add(csum, frags->csum);
hlen -= frags->len;
- } while ((frags = frags->next));
+ }
csum = skb_checksum(skb, offset, hlen, csum);
skb->ip_summed = CHECKSUM_NONE;
--
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