net_sched: Add accessor function for packet length for qdiscs

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/act_ipt.c b/net/sched/act_ipt.c
index da696fd..d1263b3 100644
--- a/net/sched/act_ipt.c
+++ b/net/sched/act_ipt.c
@@ -205,7 +205,7 @@
 	spin_lock(&ipt->tcf_lock);
 
 	ipt->tcf_tm.lastuse = jiffies;
-	ipt->tcf_bstats.bytes += skb->len;
+	ipt->tcf_bstats.bytes += qdisc_pkt_len(skb);
 	ipt->tcf_bstats.packets++;
 
 	/* yes, we have to worry about both in and out dev