1 files changed, 8 insertions, 41 deletions

diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index f18c35024207..269dd71b3828 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -108,35 +108,6 @@ static struct sk_buff *dequeue_skb(struct Qdisc *q, bool *validate,
 	return skb;
 }
 
-static inline int handle_dev_cpu_collision(struct sk_buff *skb,
-					   struct netdev_queue *dev_queue,
-					   struct Qdisc *q)
-{
-	int ret;
-
-	if (unlikely(dev_queue->xmit_lock_owner == smp_processor_id())) {
-		/*
-		 * Same CPU holding the lock. It may be a transient
-		 * configuration error, when hard_start_xmit() recurses. We
-		 * detect it by checking xmit owner and drop the packet when
-		 * deadloop is detected. Return OK to try the next skb.
-		 */
-		kfree_skb_list(skb);
-		net_warn_ratelimited("Dead loop on netdevice %s, fix it urgently!\n",
-				     dev_queue->dev->name);
-		ret = qdisc_qlen(q);
-	} else {
-		/*
-		 * Another cpu is holding lock, requeue & delay xmits for
-		 * some time.
-		 */
-		__this_cpu_inc(softnet_data.cpu_collision);
-		ret = dev_requeue_skb(skb, q);
-	}
-
-	return ret;
-}
-
 /*
  * Transmit possibly several skbs, and handle the return status as
  * required. Holding the __QDISC___STATE_RUNNING bit guarantees that
@@ -159,21 +130,21 @@ int sch_direct_xmit(struct sk_buff *skb, struct Qdisc *q,
 	if (validate)
 		skb = validate_xmit_skb_list(skb, dev);
 
-	if (skb) {
+	if (likely(skb)) {
 		HARD_TX_LOCK(dev, txq, smp_processor_id());
 		if (!netif_xmit_frozen_or_stopped(txq))
 			skb = dev_hard_start_xmit(skb, dev, txq, &ret);
 
 		HARD_TX_UNLOCK(dev, txq);
+	} else {
+		spin_lock(root_lock);
+		return qdisc_qlen(q);
 	}
 	spin_lock(root_lock);
 
 	if (dev_xmit_complete(ret)) {
 		/* Driver sent out skb successfully or skb was consumed */
 		ret = qdisc_qlen(q);
-	} else if (ret == NETDEV_TX_LOCKED) {
-		/* Driver try lock failed */
-		ret = handle_dev_cpu_collision(skb, txq, q);
 	} else {
 		/* Driver returned NETDEV_TX_BUSY - requeue skb */
 		if (unlikely(ret != NETDEV_TX_BUSY))
@@ -256,13 +227,12 @@ unsigned long dev_trans_start(struct net_device *dev)
 
 	if (is_vlan_dev(dev))
 		dev = vlan_dev_real_dev(dev);
-	res = dev->trans_start;
-	for (i = 0; i < dev->num_tx_queues; i++) {
+	res = netdev_get_tx_queue(dev, 0)->trans_start;
+	for (i = 1; i < dev->num_tx_queues; i++) {
 		val = netdev_get_tx_queue(dev, i)->trans_start;
 		if (val && time_after(val, res))
 			res = val;
 	}
-	dev->trans_start = res;
 
 	return res;
 }
@@ -285,10 +255,7 @@ static void dev_watchdog(unsigned long arg)
 				struct netdev_queue *txq;
 
 				txq = netdev_get_tx_queue(dev, i);
-				/*
-				 * old device drivers set dev->trans_start
-				 */
-				trans_start = txq->trans_start ? : dev->trans_start;
+				trans_start = txq->trans_start;
 				if (netif_xmit_stopped(txq) &&
 				    time_after(jiffies, (trans_start +
 							 dev->watchdog_timeo))) {
@@ -804,7 +771,7 @@ void dev_activate(struct net_device *dev)
 		transition_one_qdisc(dev, dev_ingress_queue(dev), NULL);
 
 	if (need_watchdog) {
-		dev->trans_start = jiffies;
+		netif_trans_update(dev);
 		dev_watchdog_up(dev);
 	}
 }