[PATCH] PCI: Add pci shutdown ability

[Greg KH <greg@kroah.com>]

Well it seems that people are starting to want to hook the reboot
notifier, or the device shutdown facility in order to properly shutdown
pci drivers to make kexec work nicer.

So here's a patch for the PCI core that allows pci drivers to now just
add a "shutdown" notifier function that will be called when the system
is being shutdown.  It happens just after the reboot notifier happens,
and it should happen in the proper device tree order, so everyone should
be happy.

Any objections to this patch?

thanks,

greg k-h
------

PCI: Add pci shutdown ability

Now pci drivers can know when the system is going down without having to
add a reboot notifier event.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

--- gregkh-2.6.orig/include/linux/pci.h	2005-04-20 21:25:11.000000000 -0700
+++ gregkh-2.6/include/linux/pci.h	2005-04-25 11:54:20.000000000 -0700
@@ -671,6 +671,7 @@
 	int  (*suspend) (struct pci_dev *dev, pm_message_t state);	/* Device suspended */
 	int  (*resume) (struct pci_dev *dev);	                /* Device woken up */
 	int  (*enable_wake) (struct pci_dev *dev, pci_power_t state, int enable);   /* Enable wake event */
+	void (*shutdown) (struct pci_dev *dev);
 
 	struct device_driver	driver;
 	struct pci_dynids dynids;
Index: gregkh-2.6/drivers/pci/pci-driver.c
===================================================================
--- gregkh-2.6.orig/drivers/pci/pci-driver.c	2005-04-06 11:47:47.000000000 -0700
+++ gregkh-2.6/drivers/pci/pci-driver.c	2005-04-25 12:02:12.000000000 -0700
@@ -318,6 +318,14 @@
 	return 0;
 }
 
+static void pci_device_shutdown(struct device *dev)
+{
+	struct pci_dev *pci_dev = to_pci_dev(dev);
+	struct pci_driver *drv = pci_dev->driver;
+
+	if (drv && drv->shutdown)
+		drv->shutdown(pci_dev);
+}
 
 #define kobj_to_pci_driver(obj) container_of(obj, struct device_driver, kobj)
 #define attr_to_driver_attribute(obj) container_of(obj, struct driver_attribute, attr)
@@ -385,6 +393,7 @@
 	drv->driver.bus = &pci_bus_type;
 	drv->driver.probe = pci_device_probe;
 	drv->driver.remove = pci_device_remove;
+	drv->driver.shutdown = pci_device_shutdown,
 	drv->driver.owner = drv->owner;
 	drv->driver.kobj.ktype = &pci_driver_kobj_type;
 	pci_init_dynids(&drv->dynids);