staging: wlan-ng: Use net_device_stats from struct net_device

Instead of using an own copy of struct net_device_stats in struct
wlandevice, use stats from struct net_device. Also remove the thus
unnecessary .ndo_get_stats function, as it would now just return
netdev->stats, which is the default in dev_get_stats().

Furthermore, convert prefix increment of stats counters to the more
common postfix increment idiom.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wlan-ng/hfa384x_usb.c

@@ -3158,8 +3158,8 @@ static void hfa384x_usbin_callback(struct urb *urb)
 
 		/* Check for short packet */
 		if (urb->actual_length == 0) {
-			++(wlandev->linux_stats.rx_errors);
+			wlandev->netdev->stats.rx_errors++;
-			++(wlandev->linux_stats.rx_length_errors);
+			wlandev->netdev->stats.rx_length_errors++;
 			action = RESUBMIT;
 		}
 		break;
@@ -3169,7 +3169,7 @@ static void hfa384x_usbin_callback(struct urb *urb)
 			    wlandev->netdev->name);
 		if (!test_and_set_bit(WORK_RX_HALT, &hw->usb_flags))
 			schedule_work(&hw->usb_work);
-		++(wlandev->linux_stats.rx_errors);
+		wlandev->netdev->stats.rx_errors++;
 		action = ABORT;
 		break;
 
@@ -3180,12 +3180,12 @@ static void hfa384x_usbin_callback(struct urb *urb)
 		    !timer_pending(&hw->throttle)) {
 			mod_timer(&hw->throttle, jiffies + THROTTLE_JIFFIES);
 		}
-		++(wlandev->linux_stats.rx_errors);
+		wlandev->netdev->stats.rx_errors++;
 		action = ABORT;
 		break;
 
 	case -EOVERFLOW:
-		++(wlandev->linux_stats.rx_over_errors);
+		wlandev->netdev->stats.rx_over_errors++;
 		action = RESUBMIT;
 		break;
 
@@ -3204,7 +3204,7 @@ static void hfa384x_usbin_callback(struct urb *urb)
 	default:
 		pr_debug("urb status=%d, transfer flags=0x%x\n",
 			 urb->status, urb->transfer_flags);
-		++(wlandev->linux_stats.rx_errors);
+		wlandev->netdev->stats.rx_errors++;
 		action = RESUBMIT;
 		break;
 	}
@@ -3712,7 +3712,7 @@ static void hfa384x_usbout_callback(struct urb *urb)
 				if (!test_and_set_bit
 				    (WORK_TX_HALT, &hw->usb_flags))
 					schedule_work(&hw->usb_work);
-				++(wlandev->linux_stats.tx_errors);
+				wlandev->netdev->stats.tx_errors++;
 				break;
 			}
 
@@ -3728,7 +3728,7 @@ static void hfa384x_usbout_callback(struct urb *urb)
 					mod_timer(&hw->throttle,
 						  jiffies + THROTTLE_JIFFIES);
 				}
-				++(wlandev->linux_stats.tx_errors);
+				wlandev->netdev->stats.tx_errors++;
 				netif_stop_queue(wlandev->netdev);
 				break;
 			}
@@ -3741,7 +3741,7 @@ static void hfa384x_usbout_callback(struct urb *urb)
 		default:
 			netdev_info(wlandev->netdev, "unknown urb->status=%d\n",
 				    urb->status);
-			++(wlandev->linux_stats.tx_errors);
+			wlandev->netdev->stats.tx_errors++;
 			break;
 		}		/* switch */
 	}

drivers/staging/wlan-ng/p80211netdev.c

@@ -92,7 +92,6 @@
 
 /* netdevice method functions */
 static int p80211knetdev_init(netdevice_t *netdev);
-static struct net_device_stats *p80211knetdev_get_stats(netdevice_t *netdev);
 static int p80211knetdev_open(netdevice_t *netdev);
 static int p80211knetdev_stop(netdevice_t *netdev);
 static int p80211knetdev_hard_start_xmit(struct sk_buff *skb,
@@ -133,30 +132,6 @@ static int p80211knetdev_init(netdevice_t *netdev)
 	return 0;
 }
 
-/*----------------------------------------------------------------
-* p80211knetdev_get_stats
-*
-* Statistics retrieval for linux netdevices.  Here we're reporting
-* the Linux i/f level statistics.  Hence, for the primary numbers,
-* we don't want to report the numbers from the MIB.  Eventually,
-* it might be useful to collect some of the error counters though.
-*
-* Arguments:
-*	netdev		Linux netdevice
-*
-* Returns:
-*	the address of the statistics structure
-----------------------------------------------------------------*/
-static struct net_device_stats *p80211knetdev_get_stats(netdevice_t *netdev)
-{
-	wlandevice_t *wlandev = netdev->ml_priv;
-
-	/* TODO: review the MIB stats for items that correspond to
-	   linux stats */
-
-	return &(wlandev->linux_stats);
-}
-
 /*----------------------------------------------------------------
 * p80211knetdev_open
 *
@@ -273,8 +248,8 @@ static int p80211_convert_to_ether(wlandevice_t *wlandev, struct sk_buff *skb)
 
 	if (skb_p80211_to_ether(wlandev, wlandev->ethconv, skb) == 0) {
 		skb->dev->last_rx = jiffies;
-		wlandev->linux_stats.rx_packets++;
+		wlandev->netdev->stats.rx_packets++;
-		wlandev->linux_stats.rx_bytes += skb->len;
+		wlandev->netdev->stats.rx_bytes += skb->len;
 		netif_rx_ni(skb);
 		return 0;
 	}
@@ -310,8 +285,8 @@ static void p80211netdev_rx_bh(unsigned long arg)
 				skb->protocol = htons(ETH_P_80211_RAW);
 				dev->last_rx = jiffies;
 
-				wlandev->linux_stats.rx_packets++;
+				dev->stats.rx_packets++;
-				wlandev->linux_stats.rx_bytes += skb->len;
+				dev->stats.rx_bytes += skb->len;
 				netif_rx_ni(skb);
 				continue;
 			} else {
@@ -386,7 +361,7 @@ static int p80211knetdev_hard_start_xmit(struct sk_buff *skb,
 		if (skb->protocol != ETH_P_80211_RAW) {
 			netif_start_queue(wlandev->netdev);
 			netdev_notice(netdev, "Tx attempt prior to association, frame dropped.\n");
-			wlandev->linux_stats.tx_dropped++;
+			netdev->stats.tx_dropped++;
 			result = 0;
 			goto failed;
 		}
@@ -420,9 +395,9 @@ static int p80211knetdev_hard_start_xmit(struct sk_buff *skb,
 
 	netdev->trans_start = jiffies;
 
-	wlandev->linux_stats.tx_packets++;
+	netdev->stats.tx_packets++;
 	/* count only the packet payload */
-	wlandev->linux_stats.tx_bytes += skb->len;
+	netdev->stats.tx_bytes += skb->len;
 
 	txresult = wlandev->txframe(wlandev, skb, &p80211_hdr, &p80211_wep);
 
@@ -710,7 +685,6 @@ static const struct net_device_ops p80211_netdev_ops = {
 	.ndo_init = p80211knetdev_init,
 	.ndo_open = p80211knetdev_open,
 	.ndo_stop = p80211knetdev_stop,
-	.ndo_get_stats = p80211knetdev_get_stats,
 	.ndo_start_xmit = p80211knetdev_hard_start_xmit,
 	.ndo_set_rx_mode = p80211knetdev_set_multicast_list,
 	.ndo_do_ioctl = p80211knetdev_do_ioctl,

drivers/staging/wlan-ng/p80211netdev.h

@@ -209,7 +209,6 @@ typedef struct wlandevice {
 	/* queue for indications waiting for cmd completion */
 	/* Linux netdevice and support */
 	netdevice_t *netdev;	/* ptr to linux netdevice */
-	struct net_device_stats linux_stats;
 
 	/* Rx bottom half */
 	struct tasklet_struct rx_bh;

drivers/staging/wlan-ng/prism2sta.c

@@ -1848,7 +1848,7 @@ void prism2sta_ev_tx(wlandevice_t *wlandev, u16 status)
 {
 	pr_debug("Tx Complete, status=0x%04x\n", status);
 	/* update linux network stats */
-	wlandev->linux_stats.tx_packets++;
+	wlandev->netdev->stats.tx_packets++;
 }
 
 /*----------------------------------------------------------------