1 files changed, 27 insertions, 9 deletions

diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 9cb781830380..471da451cd48 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -54,6 +54,7 @@ static atomic_t trapped;
 				sizeof(struct iphdr) + sizeof(struct ethhdr))
 
 static void zap_completion_queue(void);
+static void arp_reply(struct sk_buff *skb);
 
 static void queue_process(void *p)
 {
@@ -153,6 +154,22 @@ static void poll_napi(struct netpoll *np)
 	}
 }
 
+static void service_arp_queue(struct netpoll_info *npi)
+{
+	struct sk_buff *skb;
+
+	if (unlikely(!npi))
+		return;
+
+	skb = skb_dequeue(&npi->arp_tx);
+
+	while (skb != NULL) {
+		arp_reply(skb);
+		skb = skb_dequeue(&npi->arp_tx);
+	}
+	return;
+}
+
 void netpoll_poll(struct netpoll *np)
 {
 	if(!np->dev || !netif_running(np->dev) || !np->dev->poll_controller)
@@ -163,6 +180,8 @@ void netpoll_poll(struct netpoll *np)
 	if (np->dev->poll)
 		poll_napi(np);
 
+	service_arp_queue(np->dev->npinfo);
+
 	zap_completion_queue();
 }
 
@@ -279,14 +298,10 @@ static void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
 		 * network drivers do not expect to be called if the queue is
 		 * stopped.
 		 */
-		if (netif_queue_stopped(np->dev)) {
-			netif_tx_unlock(np->dev);
-			netpoll_poll(np);
-			udelay(50);
-			continue;
-		}
+		status = NETDEV_TX_BUSY;
+		if (!netif_queue_stopped(np->dev))
+			status = np->dev->hard_start_xmit(skb, np->dev);
 
-		status = np->dev->hard_start_xmit(skb, np->dev);
 		netif_tx_unlock(np->dev);
 
 		/* success */
@@ -446,7 +461,9 @@ int __netpoll_rx(struct sk_buff *skb)
 	int proto, len, ulen;
 	struct iphdr *iph;
 	struct udphdr *uh;
-	struct netpoll *np = skb->dev->npinfo->rx_np;
+	struct netpoll_info *npi = skb->dev->npinfo;
+	struct netpoll *np = npi->rx_np;
+
 
 	if (!np)
 		goto out;
@@ -456,7 +473,7 @@ int __netpoll_rx(struct sk_buff *skb)
 	/* check if netpoll clients need ARP */
 	if (skb->protocol == __constant_htons(ETH_P_ARP) &&
 	    atomic_read(&trapped)) {
-		arp_reply(skb);
+		skb_queue_tail(&npi->arp_tx, skb);
 		return 1;
 	}
 
@@ -651,6 +668,7 @@ int netpoll_setup(struct netpoll *np)
 		npinfo->poll_owner = -1;
 		npinfo->tries = MAX_RETRIES;
 		spin_lock_init(&npinfo->rx_lock);
+		skb_queue_head_init(&npinfo->arp_tx);
 	} else
 		npinfo = ndev->npinfo;