net: mv643xx_eth: Count dropped packets properly

This commit fixes the current dropped packet count by doing it properly,
increasing the count when a packet is discarded; i.e. the packet is not
processed and the driver returns NETDEV_TX_OK.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/marvell/mv643xx_eth.c b/drivers/net/ethernet/marvell/mv643xx_eth.c
index c68ff5d..97a60de 100644 (file)
--- a/drivers/net/ethernet/marvell/mv643xx_eth.c
+++ b/drivers/net/ethernet/marvell/mv643xx_eth.c
@@ -967,7 +967,6 @@ static netdev_tx_t mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
        nq = netdev_get_tx_queue(dev, queue);
 
        if (has_tiny_unaligned_frags(skb) && __skb_linearize(skb)) {
-               txq->tx_dropped++;
                netdev_printk(KERN_DEBUG, dev,
                              "failed to linearize skb with tiny unaligned fragment\n");
                return NETDEV_TX_BUSY;
@@ -976,6 +975,7 @@ static netdev_tx_t mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
        if (txq->tx_ring_size - txq->tx_desc_count < MAX_SKB_FRAGS + 1) {
                if (net_ratelimit())
                        netdev_err(dev, "tx queue full?!\n");
+               txq->tx_dropped++;
                dev_kfree_skb_any(skb);
                return NETDEV_TX_OK;
        }
@@ -997,6 +997,9 @@ static netdev_tx_t mv643xx_eth_xmit(struct sk_buff *skb, struct net_device *dev)
                        netif_tx_stop_queue(nq);
        } else if (ret == -EBUSY) {
                return NETDEV_TX_BUSY;
+       } else {
+               txq->tx_dropped++;
+               dev_kfree_skb_any(skb);
        }
 
        return NETDEV_TX_OK;