gro: Avoid unnecessary comparison after skb_gro_header

[net-next-2.6.git] / net / ipv4 / af_inet.c

diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 170689681aa2e1446f067f6e2c3c32e55de3b093..644cc55353198088e4b99e0396819fd266bda76e 100644 (file)
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1246,13 +1246,20 @@ static struct sk_buff **inet_gro_receive(struct sk_buff **head,
        struct sk_buff **pp = NULL;
        struct sk_buff *p;
        struct iphdr *iph;
+       unsigned int hlen;
+       unsigned int off;
        int flush = 1;
        int proto;
        int id;
 
-       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;
+       }
 
        proto = iph->protocol & (MAX_INET_PROTOS - 1);