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>
diff --git a/net/ipv6/netfilter.c b/net/ipv6/netfilter.c
index a74951c..7155b24 100644
--- a/net/ipv6/netfilter.c
+++ b/net/ipv6/netfilter.c
@@ -151,9 +151,7 @@
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;
};