staging: slicoss: notifiy network stack about change in link state

Notify the network stack about link states via netif_carrier_[off|on]().
Also set the link state off initially and when the interface is brought
down.
Signed-off-by: Lino Sanfilippo <LinoSanfilippo@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/slicoss/slicoss.c

@@ -1016,6 +1016,7 @@ static void slic_link_upr_complete(struct adapter *adapter, u32 isr)
 	/* link has gone from up to down */
 	if (linkup == LINK_DOWN) {
 		adapter->linkstate = LINK_DOWN;
+		netif_carrier_off(adapter->netdev);
 		return;
 	}
 
@@ -1028,6 +1029,7 @@ static void slic_link_upr_complete(struct adapter *adapter, u32 isr)
 		slic_config_set(adapter, true);
 		adapter->linkstate = LINK_UP;
 		netif_start_queue(adapter->netdev);
+		netif_carrier_on(adapter->netdev);
 	}
 }
 
@@ -2418,6 +2420,7 @@ static int slic_entry_open(struct net_device *dev)
 	int status;
 
 	netif_stop_queue(adapter->netdev);
+	netif_carrier_off(dev);
 
 	spin_lock_irqsave(&slic_global.driver_lock, flags);
 	if (!adapter->activated) {
@@ -2530,6 +2533,9 @@ static int slic_entry_halt(struct net_device *dev)
 #endif
 
 	spin_unlock_irqrestore(&slic_global.driver_lock, flags);
+
+	netif_carrier_off(dev);
+
 	return 0;
 }
 
@@ -3172,6 +3178,8 @@ static int slic_entry_probe(struct pci_dev *pcidev,
 	netdev->irq = adapter->irq;
 	netdev->netdev_ops = &slic_netdev_ops;
 
+	netif_carrier_off(netdev);
+
 	strcpy(netdev->name, "eth%d");
 	err = register_netdev(netdev);
 	if (err) {