openwrt/package/madwifi/patches/372-queue_vif.patch

--- a/net80211/ieee80211_input.c
+++ b/net80211/ieee80211_input.c
@@ -1197,6 +1197,7 @@ ieee80211_deliver_data(struct ieee80211_
 		}
 		if (skb1 != NULL) {
 			struct ieee80211_node *ni_tmp;
+			int ret;
 			skb1->dev = dev;
 			skb_reset_mac_header(skb1);
 			skb_set_network_header(skb1, sizeof(struct ether_header));
@@ -1204,7 +1205,12 @@ ieee80211_deliver_data(struct ieee80211_
 			skb1->protocol = __constant_htons(ETH_P_802_2);
 			/* XXX insert vlan tag before queue it? */
 			ni_tmp = SKB_CB(skb1)->ni; /* remember node so we can free it */
-			if (dev_queue_xmit(skb1) == NET_XMIT_DROP) {
+			ret = dev->hard_start_xmit(skb1, dev);
+
+			if (ret == NETDEV_TX_BUSY)
+				ieee80211_dev_kfree_skb(&skb1);
+
+			else if (ret != NETDEV_TX_OK) {
 				/* If queue dropped the packet because device was
 				 * too busy */
 				vap->iv_devstats.tx_dropped++;
--- a/net80211/ieee80211_output.c
+++ b/net80211/ieee80211_output.c
@@ -324,9 +324,10 @@ void ieee80211_parent_queue_xmit(struct 
 	/* Dispatch the packet to the parent device */
 	skb->dev = vap->iv_ic->ic_dev;
 
-	if (dev_queue_xmit(skb) == NET_XMIT_DROP)
+	if (netif_queue_stopped(skb->dev))
+		ieee80211_dev_kfree_skb(&skb);
+	else if (dev_queue_xmit(skb) == NET_XMIT_DROP)
 		vap->iv_devstats.tx_dropped++;
-
 }
 
 /*