8139too: allow to set mac address on running device

Similar patch as for 8139cp posted yesterday, so the same comment:

So far there was not a chance to set a mac address on running 8139too device.
This is for example needed when you want to use this NIC as a bonding slave in
bonding device in mode balance-alb. This simple patch allows it.
Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/8139too.c

@@ -640,6 +640,7 @@ static int rtl8139_start_xmit (struct sk_buff *skb,
 #ifdef CONFIG_NET_POLL_CONTROLLER
 static void rtl8139_poll_controller(struct net_device *dev);
 #endif
+static int rtl8139_set_mac_address(struct net_device *dev, void *p);
 static int rtl8139_poll(struct napi_struct *napi, int budget);
 static irqreturn_t rtl8139_interrupt (int irq, void *dev_instance);
 static int rtl8139_close (struct net_device *dev);
@@ -917,7 +918,7 @@ static const struct net_device_ops rtl8139_netdev_ops = {
 	.ndo_stop		= rtl8139_close,
 	.ndo_get_stats		= rtl8139_get_stats,
 	.ndo_validate_addr	= eth_validate_addr,
-	.ndo_set_mac_address 	= eth_mac_addr,
+	.ndo_set_mac_address 	= rtl8139_set_mac_address,
 	.ndo_start_xmit		= rtl8139_start_xmit,
 	.ndo_set_multicast_list	= rtl8139_set_rx_mode,
 	.ndo_do_ioctl		= netdev_ioctl,
@@ -2215,6 +2216,29 @@ static void rtl8139_poll_controller(struct net_device *dev)
 }
 #endif
 
+static int rtl8139_set_mac_address(struct net_device *dev, void *p)
+{
+	struct rtl8139_private *tp = netdev_priv(dev);
+	void __iomem *ioaddr = tp->mmio_addr;
+	struct sockaddr *addr = p;
+
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
+
+	spin_lock_irq(&tp->lock);
+
+	RTL_W8_F(Cfg9346, Cfg9346_Unlock);
+	RTL_W32_F(MAC0 + 0, cpu_to_le32 (*(u32 *) (dev->dev_addr + 0)));
+	RTL_W32_F(MAC0 + 4, cpu_to_le32 (*(u32 *) (dev->dev_addr + 4)));
+	RTL_W8_F(Cfg9346, Cfg9346_Lock);
+
+	spin_unlock_irq(&tp->lock);
+
+	return 0;
+}
+
 static int rtl8139_close (struct net_device *dev)
 {
 	struct rtl8139_private *tp = netdev_priv(dev);