net: natsemi: replace dev_kfree_skb_irq by dev_consume_skb_irq for drop profiles

dev_consume_skb_irq() should be called when skb xmit done. It makes
drop profiles(dropwatch, perf) more friendly.
Signed-off-by: Yang Wei <yang.wei9@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/natsemi/natsemi.c

@@ -2173,7 +2173,7 @@ static void netdev_tx_done(struct net_device *dev)
 					np->tx_skbuff[entry]->len,
 					PCI_DMA_TODEVICE);
 		/* Free the original skb. */
-		dev_kfree_skb_irq(np->tx_skbuff[entry]);
+		dev_consume_skb_irq(np->tx_skbuff[entry]);
 		np->tx_skbuff[entry] = NULL;
 	}
 	if (netif_queue_stopped(dev) &&

drivers/net/ethernet/natsemi/ns83820.c

@@ -1003,7 +1003,7 @@ static void do_tx_done(struct net_device *ndev)
 					addr,
 					len,
 					PCI_DMA_TODEVICE);
-			dev_kfree_skb_irq(skb);
+			dev_consume_skb_irq(skb);
 			atomic_dec(&dev->nr_tx_skbs);
 		} else
 			pci_unmap_page(dev->pci_dev,

drivers/net/ethernet/natsemi/sonic.c

@@ -328,7 +328,7 @@ static irqreturn_t sonic_interrupt(int irq, void *dev_id)
 				}
 
 				/* We must free the original skb */
-				dev_kfree_skb_irq(lp->tx_skb[entry]);
+				dev_consume_skb_irq(lp->tx_skb[entry]);
 				lp->tx_skb[entry] = NULL;
 				/* and unmap DMA buffer */
 				dma_unmap_single(lp->device, lp->tx_laddr[entry], lp->tx_len[entry], DMA_TO_DEVICE);