staging: et131x: Fix stats->rx_packets accounting

The net_device_stats->rx_packets counter is not getting updated.
This is due to checking a fMP_ADAPTER_LINK_DETECTION flag prior to
updating which is never set.

Solved by using netif_carrier_ok() to test for a link, and removing
the fMP_ADAPTER_LINK_DETECTION flag, which looks to be a broken
mechanism.

Signed-off-by: Mark Einon <mark.einon@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/et131x/et1310_phy.c

@@ -750,7 +750,6 @@ void et131x_Mii_check(struct et131x_adapter *etdev,
 			spin_lock_irqsave(&etdev->Lock, flags);
 
 			etdev->MediaState = NETIF_STATUS_MEDIA_CONNECT;
-			etdev->Flags &= ~fMP_ADAPTER_LINK_DETECTION;
 
 			spin_unlock_irqrestore(&etdev->Lock, flags);
 
@@ -780,8 +779,7 @@ void et131x_Mii_check(struct et131x_adapter *etdev,
 			 * Timer expires, we can report disconnected (handled
 			 * in the LinkDetectionDPC).
 			 */
-			if (!(etdev->Flags & fMP_ADAPTER_LINK_DETECTION) ||
-			 (etdev->MediaState == NETIF_STATUS_MEDIA_DISCONNECT)) {
+			if ((etdev->MediaState == NETIF_STATUS_MEDIA_DISCONNECT)) {
 				spin_lock_irqsave(&etdev->Lock, flags);
 				etdev->MediaState =
 				    NETIF_STATUS_MEDIA_DISCONNECT;

drivers/staging/et131x/et1310_rx.c

@@ -1126,10 +1126,9 @@ void et131x_handle_recv_interrupt(struct et131x_adapter *etdev)
 		 * Free buffer ring.
 		 */
 		if (!etdev->PacketFilter ||
-		    !(etdev->Flags & fMP_ADAPTER_LINK_DETECTION) ||
-		    rfd->len == 0) {
+		    !netif_carrier_ok(etdev->netdev) ||
+		    rfd->len == 0)
 			continue;
-		}
 
 		/* Increment the number of packets we received */
 		etdev->stats.ipackets++;

drivers/staging/et131x/et131x_defs.h

@@ -95,7 +95,6 @@
 #define fMP_ADAPTER_HARDWARE_ERROR	0x04000000
 #define fMP_ADAPTER_REMOVE_IN_PROGRESS	0x08000000
 #define fMP_ADAPTER_HALT_IN_PROGRESS	0x10000000
-#define fMP_ADAPTER_LINK_DETECTION	0x20000000
 
 #define fMP_ADAPTER_FAIL_SEND_MASK	0x3ff00000
 #define fMP_ADAPTER_NOT_READY_MASK	0x3ff00000

drivers/staging/et131x/et131x_initpci.c

@@ -312,7 +312,6 @@ void et131x_link_detection_handler(unsigned long data)
 		spin_lock_irqsave(&etdev->Lock, flags);
 
 		etdev->MediaState = NETIF_STATUS_MEDIA_DISCONNECT;
-		etdev->Flags &= ~fMP_ADAPTER_LINK_DETECTION;
 
 		spin_unlock_irqrestore(&etdev->Lock, flags);
 

drivers/staging/et131x/et131x_netdev.c

@@ -450,10 +450,6 @@ void et131x_tx_timeout(struct net_device *netdev)
 	struct tcb *tcb;
 	unsigned long flags;
 
-	/* Just skip this part if the adapter is doing link detection */
-	if (etdev->Flags & fMP_ADAPTER_LINK_DETECTION)
-		return;
-
 	/* Any nonrecoverable hardware error?
 	 * Checks adapter->flags for any failure in phy reading
 	 */