gro: Avoid unnecessary comparison after skb_gro_header

[safe/jmp/linux-2.6] / net / ipv6 / af_inet6.c

diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 61f5538..b6215be 100644 (file)
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -817,13 +817,20 @@ static struct sk_buff **ipv6_gro_receive(struct sk_buff **head,
        struct sk_buff *p;
        struct ipv6hdr *iph;
        unsigned int nlen;
+       unsigned int hlen;
+       unsigned int off;
        int flush = 1;
        int proto;
        __wsum csum;
 
-       iph = skb_gro_header(skb, sizeof(*iph));
-       if (unlikely(!iph))
-               goto out;
+       off = skb_gro_offset(skb);
+       hlen = off + sizeof(*iph);
+       iph = skb_gro_header_fast(skb, off);
+       if (skb_gro_header_hard(skb, hlen)) {
+               iph = skb_gro_header_slow(skb, hlen, off);
+               if (unlikely(!iph))
+                       goto out;
+       }
 
        skb_gro_pull(skb, sizeof(*iph));
        skb_set_transport_header(skb, skb_gro_offset(skb));