It is just an optimization. We don't need the value of status variable
if the packet is filtered.
Signed-off-by: Alexander Drozdov <redacted>
---
net/packet/af_packet.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index f8db706..6ecf8dd 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1910,14 +1910,15 @@ 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;
--
1.9.1