[UDP6]: Restore sk_filter optimisation

This reverts the changeset [IPV6]: UDPv6 checksum. We always need to check UDPv6 checksum because it is mandatory. The sk_filter optimisation has nothing to do whether we verify the checksum. It simply postpones it to the point when the user calls recv or poll. Signed-off-by: Herbert Xu <[email protected]> Signed-off-by: David S. Miller <[email protected]>
niw · Apr 26, 2007 · 1ab6eb6 · 1ab6eb6
1 parent 243bbca
commit 1ab6eb6
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
@@ -279,8 +279,10 @@ int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
 		}
 	}
 
-	if (udp_lib_checksum_complete(skb))
-		goto drop;
+	if (sk->sk_filter) {
+		if (udp_lib_checksum_complete(skb))
+			goto drop;
+	}
 
 	if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
 		/* Note that an ENOMEM error is charged twice */