ftgmac100: Factor tx packet dropping path

Use a simple goto to a drop path at the tail of the function,
it will be used in a few more cases soon
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/faraday/ftgmac100.c

@@ -640,10 +640,7 @@ static int ftgmac100_hard_start_xmit(struct sk_buff *skb,
 	if (unlikely(skb->len > MAX_PKT_SIZE)) {
 		if (net_ratelimit())
 			netdev_dbg(netdev, "tx packet too big\n");
-
-		netdev->stats.tx_dropped++;
-		kfree_skb(skb);
-		return NETDEV_TX_OK;
+		goto drop;
 	}
 
 	map = dma_map_single(priv->dev, skb->data, skb_headlen(skb), DMA_TO_DEVICE);
@@ -651,10 +648,7 @@ static int ftgmac100_hard_start_xmit(struct sk_buff *skb,
 		/* drop packet */
 		if (net_ratelimit())
 			netdev_err(netdev, "map socket buffer failed\n");
-
-		netdev->stats.tx_dropped++;
-		kfree_skb(skb);
-		return NETDEV_TX_OK;
+		goto drop;
 	}
 
 	txdes = ftgmac100_current_txdes(priv);
@@ -693,6 +687,13 @@ static int ftgmac100_hard_start_xmit(struct sk_buff *skb,
 
 	ftgmac100_txdma_normal_prio_start_polling(priv);
 
+	return NETDEV_TX_OK;
+
+ drop:
+	/* Drop the packet */
+	dev_kfree_skb_any(skb);
+	netdev->stats.tx_dropped++;
+
 	return NETDEV_TX_OK;
 }