[NET] Add netpoll support for tg3

drivers/net/tg3.c

@@ -2479,6 +2479,15 @@ static irqreturn_t tg3_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 static int tg3_init_hw(struct tg3 *);
 static int tg3_halt(struct tg3 *);
 
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void tg3_poll_controller(struct net_device *dev)
+{
+	disable_irq(dev->irq);
+	tg3_interrupt (dev->irq, dev, NULL);
+	enable_irq(dev->irq);
+}
+#endif
+
 static void tg3_reset_task(void *_data)
 {
 	struct tg3 *tp = _data;
@@ -7665,6 +7674,9 @@ static int __devinit tg3_init_one(struct pci_dev *pdev,
 	dev->watchdog_timeo = TG3_TX_TIMEOUT;
 	dev->change_mtu = tg3_change_mtu;
 	dev->irq = pdev->irq;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+	dev->poll_controller = tg3_poll_controller;
+#endif
 
 	err = tg3_get_invariants(tp);
 	if (err) {