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af_packet: make tpacket_rcv to not set status value before run_filter 

It is just an optimization. We don't need the value of status variable
if the packet is filtered.

Signed-off-by: Alexander Drozdov <al.drozdov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Drozdov 2015-03-23 09:11:12 +03:00 committed by David S. Miller
parent c69736696c
commit 68c2e5de36
1 changed files with 4 additions and 3 deletions
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7
net/packet/af_packet.c
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@ -1916,14 +1916,15 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
}
}
if (skb->ip_summed == CHECKSUM_PARTIAL)
status |= TP_STATUS_CSUMNOTREADY;
snaplen = skb->len;
res = run_filter(skb, sk, snaplen);
if (!res)
goto drop_n_restore;
if (skb->ip_summed == CHECKSUM_PARTIAL)
status |= TP_STATUS_CSUMNOTREADY;
if (snaplen > res)
snaplen = res;