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>

1 files changed, 4 insertions, 3 deletions

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;