From: Alexander Drozdov Date: Mon, 23 Mar 2015 06:11:12 +0000 (+0300) Subject: af_packet: make tpacket_rcv to not set status value before run_filter X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=68c2e5de360411674d9821ee2b46f5d8ee965161;p=linux-beck.git 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 Signed-off-by: David S. Miller --- diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index b91ac5946ad1..9d854c5ce0b5 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -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;