Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
  s2io: fixing DBG_PRINT() macro
  ath9k: fix dma direction for map/unmap in ath_rx_tasklet
  net: dev_forward_skb should call nf_reset
  net sched: fix race in mirred device removal
  tun: avoid BUG, dump packet on GSO errors
  bonding: set device in RLB ARP packet handler
  wimax/i2400m: Add PID & VID for Intel WiMAX 6250
  ipv6: Don't add routes to ipv6 disabled interfaces.
  net: Fix skb_copy_expand() handling of ->csum_start
  net: Fix corruption of skb csum field in pskb_expand_head() of net/core/skbuff.c
  macvtap: Limit packet queue length
  ixgbe/igb: catch invalid VF settings
  bnx2x: Advance a module version
  bnx2x: Protect statistics ramrod and sequence number
  bnx2x: Protect a SM state change
  wireless: use netif_rx_ni in ieee80211_send_layer2_update

1 files changed, 16 insertions, 2 deletions

diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index a8a94e2f6ddc..ff02b836c3c4 100644
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -180,11 +180,18 @@ static int macvtap_forward(struct net_device *dev, struct sk_buff *skb)
 {
 	struct macvtap_queue *q = macvtap_get_queue(dev, skb);
 	if (!q)
-		return -ENOLINK;
+		goto drop;
+
+	if (skb_queue_len(&q->sk.sk_receive_queue) >= dev->tx_queue_len)
+		goto drop;
 
 	skb_queue_tail(&q->sk.sk_receive_queue, skb);
 	wake_up_interruptible_poll(sk_sleep(&q->sk), POLLIN | POLLRDNORM | POLLRDBAND);
-	return 0;
+	return NET_RX_SUCCESS;
+
+drop:
+	kfree_skb(skb);
+	return NET_RX_DROP;
 }
 
 /*
@@ -235,8 +242,15 @@ static void macvtap_dellink(struct net_device *dev,
 	macvlan_dellink(dev, head);
 }
 
+static void macvtap_setup(struct net_device *dev)
+{
+	macvlan_common_setup(dev);
+	dev->tx_queue_len = TUN_READQ_SIZE;
+}
+
 static struct rtnl_link_ops macvtap_link_ops __read_mostly = {
 	.kind		= "macvtap",
+	.setup		= macvtap_setup,
 	.newlink	= macvtap_newlink,
 	.dellink	= macvtap_dellink,
 };