netfilter: kill redundant check code in which setting ip_summed value

If the returned csum value is 0, We has set ip_summed with CHECKSUM_UNNECESSARY flag in __skb_checksum_complete_head(). So this patch kills the check and changes to return to upper caller directly. Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com> Signed-off-by: Patrick McHardy <kaber@trash.net>
git-mirror · Jun 14, 2010 · c86ee67 · c86ee67
1 parent f5c5440
commit c86ee67
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Showing 2 changed files with 2 additions and 6 deletions.
diff --git a/net/ipv4/netfilter.c b/net/ipv4/netfilter.c
@@ -212,9 +212,7 @@ static __sum16 nf_ip_checksum_partial(struct sk_buff *skb, unsigned int hook,
 		skb->csum = csum_tcpudp_nofold(iph->saddr, iph->daddr, protocol,
 					       skb->len - dataoff, 0);
 		skb->ip_summed = CHECKSUM_NONE;
-		csum = __skb_checksum_complete_head(skb, dataoff + len);
-		if (!csum)
-			skb->ip_summed = CHECKSUM_UNNECESSARY;
+		return __skb_checksum_complete_head(skb, dataoff + len);
 	}
 	return csum;
 }

diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
@@ -151,9 +151,7 @@ static __sum16 nf_ip6_checksum_partial(struct sk_buff *skb, unsigned int hook,
 							 protocol,
 							 csum_sub(0, hsum)));
 		skb->ip_summed = CHECKSUM_NONE;
-		csum = __skb_checksum_complete_head(skb, dataoff + len);
-		if (!csum)
-			skb->ip_summed = CHECKSUM_UNNECESSARY;
+		return __skb_checksum_complete_head(skb, dataoff + len);
 	}
 	return csum;
 };