[PATCH v2] macvlan: Fix rx counters update in macvlan_handle_frame()

[Sridhar Samudrala <sri@us.ibm.com>]

Fix macvlan_handle_frame() to update the rx counters based
on the return value of the vlan->receive call.

Updated the patch to not do any packet count drops when the interface
is down based on Herber'ts comments.

Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 87e8d4c..bcb1b36 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -152,7 +152,8 @@ static struct sk_buff *macvlan_handle_frame(struct macvlan_port *port,
 	const struct macvlan_dev *vlan;
 	const struct macvlan_dev *src;
 	struct net_device *dev;
-	unsigned int len;
+	unsigned int len = 0;
+	int ret = NET_RX_DROP;
 
 	if (is_multicast_ether_addr(eth->h_dest)) {
 		src = macvlan_hash_lookup(port, eth->h_source);
@@ -188,14 +189,16 @@ static struct sk_buff *macvlan_handle_frame(struct macvlan_port *port,
 	}
 	len = skb->len + ETH_HLEN;
 	skb = skb_share_check(skb, GFP_ATOMIC);
-	macvlan_count_rx(vlan, len, skb != NULL, 0);
 	if (!skb)
-		return NULL;
+		goto out;
 
 	skb->dev = dev;
 	skb->pkt_type = PACKET_HOST;
 
-	vlan->receive(skb);
+	ret = vlan->receive(skb);
+
+out:
+	macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0);
 	return NULL;
 }