--- sys/net/if_vlan.c.orig	2006-10-17 11:24:18.000000000 +0400
+++ sys/net/if_vlan.c	2007-11-07 01:25:22.000000000 +0300
@@ -439,7 +439,9 @@ vlan_clone_create(struct if_clone *ifc, 
 	ifp->if_init = vlan_ifinit;
 	ifp->if_start = vlan_start;
 	ifp->if_ioctl = vlan_ioctl;
-	ifp->if_snd.ifq_maxlen = ifqmaxlen;
+	IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
+	ifp->if_snd.ifq_drv_maxlen = 0;
+	IFQ_SET_READY(&ifp->if_snd);
 	ifp->if_flags = VLAN_IFFLAGS;
 	ether_ifattach(ifp, eaddr);
 	/* Now undo some of the damage... */
@@ -532,8 +534,9 @@ vlan_start(struct ifnet *ifp)
 	ifv = ifp->if_softc;
 	p = ifv->ifv_p;
 
-	for (;;) {
-		IF_DEQUEUE(&ifp->if_snd, m);
+	while (!IFQ_IS_EMPTY(&ifp->if_snd)) {
+
+		IFQ_DEQUEUE(&ifp->if_snd, m);
 		if (m == 0)
 			break;
 		BPF_MTAP(ifp, m);