PCI: start to use common fields of struct device_driver more

- add struct device_driver field to struct pci_driver
- make sure those fields get set on driver registration (and register with core)
- remove internal pci_drivers

drivers/pci/hotplug.c

@@ -2,7 +2,6 @@
 #include <linux/module.h>
 #include <linux/kmod.h>		/* for hotplug_path */
 
-extern struct list_head pci_drivers;
 extern int pci_announce_device(struct pci_driver *drv, struct pci_dev *dev);
 
 #ifndef FALSE
@@ -61,7 +60,7 @@ pci_announce_device_to_drivers(struct pci_dev *dev)
 {
 	struct list_head *ln;
 
-	for(ln=pci_drivers.next; ln != &pci_drivers; ln=ln->next) {
+	for(ln=pci_bus_type.drivers.next; ln != &pci_bus_type.drivers; ln=ln->next) {
 		struct pci_driver *drv = list_entry(ln, struct pci_driver, node);
 		if (drv->remove && pci_announce_device(drv, dev))
 			break;

drivers/pci/pci-driver.c

@@ -10,8 +10,6 @@
  *  Registration of PCI drivers and handling of hot-pluggable devices.
  */
 
-LIST_HEAD(pci_drivers);
-
 /**
  * pci_match_device - Tell if a PCI device structure has a matching PCI device id structure
  * @ids: array of PCI device id structures to search in
@@ -61,6 +59,57 @@ pci_announce_device(struct pci_driver *drv, struct pci_dev *dev)
 	return ret;
 }
 
+
+static int pci_device_probe(struct device * dev)
+{
+	int error = 0;
+
+	struct pci_driver * drv = list_entry(dev->driver,struct pci_driver,driver);
+	struct pci_dev * pci_dev = list_entry(dev,struct pci_dev,dev);
+
+	if (drv->probe)
+		error = drv->probe(pci_dev,NULL);
+	printk("%s: returning %d\n",__FUNCTION__,error);
+	return error > 0 ? 0 : -ENODEV;
+}
+
+static int pci_device_remove(struct device * dev, u32 flags)
+{
+	struct pci_dev * pci_dev = list_entry(dev,struct pci_dev,dev);
+
+	if (dev->driver) {
+		struct pci_driver * drv = list_entry(dev->driver,struct pci_driver,driver);
+		if (drv->remove)
+			drv->remove(pci_dev);
+	}
+	return 0;
+}
+
+static int pci_device_suspend(struct device * dev, u32 state, u32 level)
+{
+	struct pci_dev * pci_dev = (struct pci_dev *)list_entry(dev,struct pci_dev,dev);
+	int error = 0;
+
+	if (pci_dev->driver) {
+		if (level == SUSPEND_SAVE_STATE && pci_dev->driver->save_state)
+			error = pci_dev->driver->save_state(pci_dev,state);
+		else if (level == SUSPEND_POWER_DOWN && pci_dev->driver->suspend)
+			error = pci_dev->driver->suspend(pci_dev,state);
+	}
+	return error;
+}
+
+static int pci_device_resume(struct device * dev, u32 level)
+{
+	struct pci_dev * pci_dev = (struct pci_dev *)list_entry(dev,struct pci_dev,dev);
+
+	if (pci_dev->driver) {
+		if (level == RESUME_POWER_ON && pci_dev->driver->resume)
+			pci_dev->driver->resume(pci_dev);
+	}
+	return 0;
+}
+
 /**
  * pci_register_driver - register a new pci driver
  * @drv: the driver structure to register
@@ -73,15 +122,25 @@ pci_announce_device(struct pci_driver *drv, struct pci_dev *dev)
 int
 pci_register_driver(struct pci_driver *drv)
 {
-	struct pci_dev *dev;
 	int count = 0;
+	struct pci_dev * dev;
+
+	/* initialize common driver fields */
+	drv->driver.name = drv->name;
+	drv->driver.bus = &pci_bus_type;
+	drv->driver.probe = pci_device_probe;
+	drv->driver.resume = pci_device_resume;
+	drv->driver.suspend = pci_device_suspend;
+	drv->driver.remove = pci_device_remove;
+
+	/* register with core */
+	count = driver_register(&drv->driver);
 
-	list_add_tail(&drv->node, &pci_drivers);
 	pci_for_each_dev(dev) {
 		if (!pci_dev_driver(dev))
-			count += pci_announce_device(drv, dev);
+			pci_announce_device(drv, dev);
 	}
-	return count;
+	return count ? count : 1;
 }
 
 /**
@@ -97,16 +156,21 @@ pci_register_driver(struct pci_driver *drv)
 void
 pci_unregister_driver(struct pci_driver *drv)
 {
-	struct pci_dev *dev;
-
-	list_del(&drv->node);
-	pci_for_each_dev(dev) {
-		if (dev->driver == drv) {
-			if (drv->remove)
-				drv->remove(dev);
-			dev->driver = NULL;
-		}
+	list_t * node;
+	
+	node = drv->driver.devices.next;
+
+	while (node != &drv->driver.devices) {
+		struct device * dev = list_entry(node,struct device,driver_list);
+		struct pci_dev * pci_dev = list_entry(dev,struct pci_dev,dev);
+
+		if (drv->remove)
+			drv->remove(pci_dev);
+		pci_dev->driver = NULL;
+		dev->driver = NULL;
+		list_del_init(&dev->driver_list);
 	}
+	put_driver(&drv->driver);
 }
 
 static struct pci_driver pci_compat_driver = {
@@ -134,36 +198,6 @@ pci_dev_driver(const struct pci_dev *dev)
 	return NULL;
 }
 
-static int pci_device_suspend(struct device * dev, u32 state, u32 level)
-{
-	struct pci_dev * pci_dev = (struct pci_dev *)list_entry(dev,struct pci_dev,dev);
-	int error = 0;
-
-	if (pci_dev->driver) {
-		if (level == SUSPEND_SAVE_STATE && pci_dev->driver->save_state)
-			error = pci_dev->driver->save_state(pci_dev,state);
-		else if (level == SUSPEND_POWER_DOWN && pci_dev->driver->suspend)
-			error = pci_dev->driver->suspend(pci_dev,state);
-	}
-	return error;
-}
-
-static int pci_device_resume(struct device * dev, u32 level)
-{
-	struct pci_dev * pci_dev = (struct pci_dev *)list_entry(dev,struct pci_dev,dev);
-
-	if (pci_dev->driver) {
-		if (level == RESUME_POWER_ON && pci_dev->driver->resume)
-			pci_dev->driver->resume(pci_dev);
-	}
-	return 0;
-}
-
-struct device_driver pci_device_driver = {
-	suspend:	pci_device_suspend,
-	resume:		pci_device_resume,
-};
-
 struct bus_type pci_bus_type = {
 	name:	"pci",
 };

drivers/pci/probe.c

@@ -18,8 +18,6 @@
 LIST_HEAD(pci_root_buses);
 LIST_HEAD(pci_devices);
 
-extern struct device_driver pci_device_driver;
-
 /*
  * Translate the low bits of the PCI base
  * to the resource type
@@ -512,7 +510,6 @@ unsigned int __devinit pci_do_scan_bus(struct pci_bus *bus)
 	dev0.bus = bus;
 	dev0.sysdata = bus->sysdata;
 	dev0.dev.parent = bus->dev;
-	dev0.dev.driver = &pci_device_driver;
 	dev0.dev.bus = &pci_bus_type;
 
 	/* Go find them, Rover! */

include/linux/pci.h

@@ -487,6 +487,8 @@ struct pci_driver {
 	int  (*suspend) (struct pci_dev *dev, u32 state);	/* Device suspended */
 	int  (*resume) (struct pci_dev *dev);	                /* Device woken up */
 	int  (*enable_wake) (struct pci_dev *dev, u32 state, int enable);   /* Enable wake event */
+
+	struct device_driver	driver;
 };