[RFC][PATCH] basic PCI<->PCI bridge PM (suspend/resume) [9/9]

[Adam Belay <abelay@novell.com>]

This patch adds very simplistic suspend/resume support for the PCI
bridge driver.  Soon this will be replaced with bridge specific code,
but for now we'll try using pci_save/restore_state().

Signed-off-by: Adam Belay <abelay@novell.com>

--- a/drivers/pci/bus/pci-bridge.c	2005-07-14 04:22:13.000000000 -0400
+++ b/drivers/pci/bus/pci-bridge.c	2005-07-14 04:26:17.257004064 -0400
@@ -159,11 +159,29 @@
 	pci_remove_bus(dev->subordinate);
 }
 
+static int ppb_suspend(struct pci_dev *dev, pm_message_t state)
+{
+	pci_save_state(dev);
+	pci_set_power_state(dev, pci_choose_state(dev, state));
+
+	return 0;
+}
+
+static int ppb_resume(struct pci_dev *dev)
+{
+	pci_set_power_state(dev, PCI_D0);
+	pci_restore_state(dev);
+
+	return 0;
+}
+
 static struct pci_driver ppb_driver = {
 	.name		= "pci-bridge",
 	.id_table	= ppb_id_tbl,
 	.probe		= ppb_probe,
 	.remove		= ppb_remove,
+	.suspend	= ppb_suspend,
+	.resume		= ppb_resume,
 };
 
 static int __init ppb_init(void)