usbnet: kaweth: Use net_device_stats from struct net_device

Instead of using a private copy of struct net_device_stats in struct
kaweth_device, use stats from struct net_device. Also remove the now
unnecessary .ndo_get_stats function.

Cc: linux-usb@vger.kernel.org
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/usb/kaweth.c

@@ -245,8 +245,6 @@ struct kaweth_device
 	__u16 packet_filter_bitmap;
 
 	struct kaweth_ethernet_configuration configuration;
-
-	struct net_device_stats stats;
 };
 
 /****************************************************************
@@ -598,7 +596,7 @@ static void kaweth_usb_receive(struct urb *urb)
 	struct sk_buff *skb;
 
 	if (unlikely(status == -EPIPE)) {
-		kaweth->stats.rx_errors++;
+		net->stats.rx_errors++;
 		kaweth->end = 1;
 		wake_up(&kaweth->term_wait);
 		dev_dbg(dev, "Status was -EPIPE.\n");
@@ -613,12 +611,12 @@ static void kaweth_usb_receive(struct urb *urb)
 	}
 	if (unlikely(status == -EPROTO || status == -ETIME ||
 		     status == -EILSEQ)) {
-		kaweth->stats.rx_errors++;
+		net->stats.rx_errors++;
 		dev_dbg(dev, "Status was -EPROTO, -ETIME, or -EILSEQ.\n");
 		return;
 	}
 	if (unlikely(status == -EOVERFLOW)) {
-		kaweth->stats.rx_errors++;
+		net->stats.rx_errors++;
 		dev_dbg(dev, "Status was -EOVERFLOW.\n");
 	}
 	spin_lock(&kaweth->device_lock);
@@ -663,8 +661,8 @@ static void kaweth_usb_receive(struct urb *urb)
 
 		netif_rx(skb);
 
-		kaweth->stats.rx_packets++;
-		kaweth->stats.rx_bytes += pkt_len;
+		net->stats.rx_packets++;
+		net->stats.rx_bytes += pkt_len;
 	}
 
 	kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
@@ -810,7 +808,7 @@ static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
 		dev_kfree_skb_irq(skb);
 		skb = copied_skb;
 		if (!copied_skb) {
-			kaweth->stats.tx_errors++;
+			net->stats.tx_errors++;
 			netif_start_queue(net);
 			spin_unlock_irq(&kaweth->device_lock);
 			return NETDEV_TX_OK;
@@ -834,15 +832,15 @@ static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
 	{
 		dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
 skip:
-		kaweth->stats.tx_errors++;
+		net->stats.tx_errors++;
 
 		netif_start_queue(net);
 		dev_kfree_skb_irq(skb);
 	}
 	else
 	{
-		kaweth->stats.tx_packets++;
-		kaweth->stats.tx_bytes += skb->len;
+		net->stats.tx_packets++;
+		net->stats.tx_bytes += skb->len;
 	}
 
 	spin_unlock_irq(&kaweth->device_lock);
@@ -911,15 +909,6 @@ static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
 	}
 }
 
-/****************************************************************
- *     kaweth_netdev_stats
- ****************************************************************/
-static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
-{
-	struct kaweth_device *kaweth = netdev_priv(dev);
-	return &kaweth->stats;
-}
-
 /****************************************************************
  *     kaweth_tx_timeout
  ****************************************************************/
@@ -928,7 +917,7 @@ static void kaweth_tx_timeout(struct net_device *net)
 	struct kaweth_device *kaweth = netdev_priv(net);
 
 	dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
-	kaweth->stats.tx_errors++;
+	net->stats.tx_errors++;
 	netif_trans_update(net);
 
 	usb_unlink_urb(kaweth->tx_urb);
@@ -981,7 +970,6 @@ static const struct net_device_ops kaweth_netdev_ops = {
 	.ndo_start_xmit =		kaweth_start_xmit,
 	.ndo_tx_timeout =		kaweth_tx_timeout,
 	.ndo_set_rx_mode =		kaweth_set_rx_mode,
-	.ndo_get_stats =		kaweth_netdev_stats,
 	.ndo_set_mac_address =		eth_mac_addr,
 	.ndo_validate_addr =		eth_validate_addr,
 };