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netfilter: only do skb_checksum_help on CHECKSUM_PARTIAL in ip_queue 

While doing yet another audit on ip_summed I noticed ip_queue
calling skb_checksum_help unnecessarily.  As we will set ip_summed
to CHECKSUM_NONE when necessary in ipq_mangle_ipv4, there is no
need to zap CHECKSUM_COMPLETE in ipq_build_packet_message.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Patrick McHardy <kaber@trash.net>
This commit is contained in:
Herbert Xu 2010-04-08 14:52:28 +02:00 committed by Patrick McHardy
parent 3d91c1a848
commit 9e56c21486
1 changed files with 1 additions and 2 deletions
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3
net/ipv4/netfilter/ip_queue.c
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@ -160,8 +160,7 @@ ipq_build_packet_message(struct nf_queue_entry *entry, int *errp)
break;
case IPQ_COPY_PACKET:
if ((entry->skb->ip_summed == CHECKSUM_PARTIAL ||
entry->skb->ip_summed == CHECKSUM_COMPLETE) &&
if (entry->skb->ip_summed == CHECKSUM_PARTIAL &&
(*errp = skb_checksum_help(entry->skb))) {
read_unlock_bh(&queue_lock);
return NULL;