[PATCH] fix tulip suspend/resume #2

This patch allows the tulip driver to suspend and resume properly.  It was
originally written by Karsten Keil and then modified by Adam Belay.
Signed-off-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: Adam Belay <abelay@novell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>

drivers/net/tulip/tulip_core.c

@@ -1757,11 +1757,19 @@ static int tulip_suspend (struct pci_dev *pdev, pm_message_t state)
 {
 	struct net_device *dev = pci_get_drvdata(pdev);
 
-	if (dev && netif_running (dev) && netif_device_present (dev)) {
-		netif_device_detach (dev);
-		tulip_down (dev);
-		/* pci_power_off(pdev, -1); */
-	}
+	if (!dev)
+		return -EINVAL;
+
+	if (netif_running(dev))
+		tulip_down(dev);
+
+	netif_device_detach(dev);
+	free_irq(dev->irq, dev);
+
+	pci_save_state(pdev);
+	pci_disable_device(pdev);
+	pci_set_power_state(pdev, pci_choose_state(pdev, state));
+
 	return 0;
 }
 
@@ -1769,15 +1777,26 @@ static int tulip_suspend (struct pci_dev *pdev, pm_message_t state)
 static int tulip_resume(struct pci_dev *pdev)
 {
 	struct net_device *dev = pci_get_drvdata(pdev);
+	int retval;
 
-	if (dev && netif_running (dev) && !netif_device_present (dev)) {
-#if 1
-		pci_enable_device (pdev);
-#endif
-		/* pci_power_on(pdev); */
-		tulip_up (dev);
-		netif_device_attach (dev);
+	if (!dev)
+		return -EINVAL;
+
+	pci_set_power_state(pdev, PCI_D0);
+	pci_restore_state(pdev);
+
+	pci_enable_device(pdev);
+
+	if ((retval = request_irq(dev->irq, &tulip_interrupt, SA_SHIRQ, dev->name, dev))) {
+		printk (KERN_ERR "tulip: request_irq failed in resume\n");
+		return retval;
 	}
+
+	netif_device_attach(dev);
+
+	if (netif_running(dev))
+		tulip_up(dev);
+
 	return 0;
 }