--- k/net/core/dev.c  (mode:100644)
+++ l/net/core/dev.c  (mode:100644)
@@ -1312,6 +1312,11 @@ int dev_queue_xmit(struct sk_buff *skb)
 
 			HARD_TX_LOCK(dev, cpu);
 
+			if (unlikely(!netif_carrier_ok(dev))) {
+				HARD_TX_UNLOCK(dev);
+				goto out_no_carrier;
+			}
+
 			if (!netif_queue_stopped(dev)) {
 				if (netdev_nit)
 					dev_queue_xmit_nit(skb, dev);
@@ -1335,6 +1340,7 @@ int dev_queue_xmit(struct sk_buff *skb)
 		}
 	}
 
+out_no_carrier:
 	rc = -ENETDOWN;
 	local_bh_enable();
 
--- k/net/sched/sch_generic.c  (mode:100644)
+++ l/net/sched/sch_generic.c  (mode:100644)
@@ -134,6 +134,11 @@ int qdisc_restart(struct net_device *dev
 			/* And release queue */
 			spin_unlock(&dev->queue_lock);
 
+			if (unlikely(!netif_carrier_ok(dev))) {
+				kfree_skb(skb);
+				goto out_no_carrier;
+			}
+
 			if (!netif_queue_stopped(dev)) {
 				int ret;
 				if (netdev_nit)
@@ -141,6 +146,7 @@ int qdisc_restart(struct net_device *dev
 
 				ret = dev->hard_start_xmit(skb, dev);
 				if (ret == NETDEV_TX_OK) { 
+out_no_carrier:
 					if (!nolock) {
 						dev->xmit_lock_owner = -1;
 						spin_unlock(&dev->xmit_lock);