Merge branch 'pci/yinghai-survey-resources+acpi-scan' into next

* pci/yinghai-survey-resources+acpi-scan:
  ACPI / scan: Treat power resources in a special way
  ACPI: Remove unused struct acpi_pci_root.id member
  ACPI: Drop ACPI device .bind() and .unbind() callbacks
  ACPI / PCI: Move the _PRT setup and cleanup code to pci-acpi.c
  ACPI / PCI: Rework the setup and cleanup of device wakeup
  ACPI: Add .setup() and .cleanup() callbacks to struct acpi_bus_type
  ACPI: Make acpi_bus_scan() and acpi_bus_add() take only one argument
  ACPI: Replace ACPI device add_type field with a match_driver flag
  ACPI: Drop the second argument of acpi_bus_scan()
  ACPI: Remove the arguments of acpi_bus_add() that are not used
  ACPI: Remove acpi_start_single_object() and acpi_bus_start()
  ACPI / PCI: Fold acpi_pci_root_start() into acpi_pci_root_add()
  ACPI: Change the ordering of acpi_bus_check_add()
  ACPI: Replace struct acpi_bus_ops with enum type
  ACPI: Reduce the usage of struct acpi_bus_ops
  ACPI: Make acpi_bus_add() and acpi_bus_start() visibly different
  ACPI: Change the ordering of PCI root bridge driver registrarion
  ACPI: Separate adding ACPI device objects from probing ACPI drivers

drivers/acpi/Makefile

@@ -37,7 +37,7 @@ acpi-y				+= resource.o
 acpi-y				+= processor_core.o
 acpi-y				+= ec.o
 acpi-$(CONFIG_ACPI_DOCK)	+= dock.o
-acpi-y				+= pci_root.o pci_link.o pci_irq.o pci_bind.o
+acpi-y				+= pci_root.o pci_link.o pci_irq.o
 acpi-y				+= acpi_platform.o
 acpi-y				+= power.o
 acpi-y				+= event.o

drivers/acpi/acpi_memhotplug.c

@@ -157,38 +157,26 @@ static int
 acpi_memory_get_device(acpi_handle handle,
 		       struct acpi_memory_device **mem_device)
 {
-	acpi_status status;
-	acpi_handle phandle;
 	struct acpi_device *device = NULL;
-	struct acpi_device *pdevice = NULL;
 	int result;
 
-
 	if (!acpi_bus_get_device(handle, &device) && device)
 		goto end;
 
-	status = acpi_get_parent(handle, &phandle);
-	if (ACPI_FAILURE(status)) {
-		ACPI_EXCEPTION((AE_INFO, status, "Cannot find acpi parent"));
-		return -EINVAL;
-	}
-
-	/* Get the parent device */
-	result = acpi_bus_get_device(phandle, &pdevice);
-	if (result) {
-		acpi_handle_warn(phandle, "Cannot get acpi bus device\n");
-		return -EINVAL;
-	}
-
 	/*
 	 * Now add the notified device.  This creates the acpi_device
 	 * and invokes .add function
 	 */
-	result = acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE);
+	result = acpi_bus_add(handle);
 	if (result) {
 		acpi_handle_warn(handle, "Cannot add acpi bus\n");
 		return -EINVAL;
 	}
+	result = acpi_bus_get_device(handle, &device);
+	if (result) {
+		acpi_handle_warn(handle, "Missing device object\n");
+		return -EINVAL;
+	}
 
       end:
 	*mem_device = acpi_driver_data(device);

drivers/acpi/container.c

@@ -135,30 +135,6 @@ static int acpi_container_remove(struct acpi_device *device, int type)
 	return status;
 }
 
-static int container_device_add(struct acpi_device **device, acpi_handle handle)
-{
-	acpi_handle phandle;
-	struct acpi_device *pdev;
-	int result;
-
-
-	if (acpi_get_parent(handle, &phandle)) {
-		return -ENODEV;
-	}
-
-	if (acpi_bus_get_device(phandle, &pdev)) {
-		return -ENODEV;
-	}
-
-	if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_DEVICE)) {
-		return -ENODEV;
-	}
-
-	result = acpi_bus_start(*device);
-
-	return result;
-}
-
 static void container_notify_cb(acpi_handle handle, u32 type, void *context)
 {
 	struct acpi_device *device = NULL;
@@ -190,11 +166,16 @@ static void container_notify_cb(acpi_handle handle, u32 type, void *context)
 		if (!ACPI_FAILURE(status) || device)
 			break;
 
-		result = container_device_add(&device, handle);
+		result = acpi_bus_add(handle);
 		if (result) {
 			acpi_handle_warn(handle, "Failed to add container\n");
 			break;
 		}
+		result = acpi_bus_get_device(handle, &device);
+		if (result) {
+			acpi_handle_warn(handle, "Missing device object\n");
+			break;
+		}
 
 		kobject_uevent(&device->dev.kobj, KOBJ_ONLINE);
 		ost_code = ACPI_OST_SC_SUCCESS;

drivers/acpi/device_pm.c

@@ -353,7 +353,7 @@ int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
  * acpi_dev_pm_get_node - Get ACPI device node for the given physical device.
  * @dev: Device to get the ACPI node for.
  */
-static struct acpi_device *acpi_dev_pm_get_node(struct device *dev)
+struct acpi_device *acpi_dev_pm_get_node(struct device *dev)
 {
 	acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
 	struct acpi_device *adev;

drivers/acpi/dock.c

@@ -310,8 +310,6 @@ static int dock_present(struct dock_station *ds)
 static struct acpi_device * dock_create_acpi_device(acpi_handle handle)
 {
 	struct acpi_device *device;
-	struct acpi_device *parent_device;
-	acpi_handle parent;
 	int ret;
 
 	if (acpi_bus_get_device(handle, &device)) {
@@ -319,16 +317,11 @@ static struct acpi_device * dock_create_acpi_device(acpi_handle handle)
 		 * no device created for this object,
 		 * so we should create one.
 		 */
-		acpi_get_parent(handle, &parent);
-		if (acpi_bus_get_device(parent, &parent_device))
-			parent_device = NULL;
-
-		ret = acpi_bus_add(&device, parent_device, handle,
-			ACPI_BUS_TYPE_DEVICE);
-		if (ret) {
+		ret = acpi_bus_add(handle);
+		if (ret)
 			pr_debug("error adding bus, %x\n", -ret);
-			return NULL;
-		}
+
+		acpi_bus_get_device(handle, &device);
 	}
 	return device;
 }

drivers/acpi/glue.c

@@ -63,6 +63,9 @@ static struct acpi_bus_type *acpi_get_bus_type(struct bus_type *type)
 {
 	struct acpi_bus_type *tmp, *ret = NULL;
 
+	if (!type)
+		return NULL;
+
 	down_read(&bus_type_sem);
 	list_for_each_entry(tmp, &bus_type_list, list) {
 		if (tmp->bus == type) {
@@ -264,28 +267,39 @@ static int acpi_platform_notify(struct device *dev)
 {
 	struct acpi_bus_type *type;
 	acpi_handle handle;
-	int ret = -EINVAL;
+	int ret;
 
 	ret = acpi_bind_one(dev, NULL);
-	if (!ret)
-		goto out;
-
-	if (!dev->bus || !dev->parent) {
+	if (ret && (!dev->bus || !dev->parent)) {
 		/* bridge devices genernally haven't bus or parent */
 		ret = acpi_find_bridge_device(dev, &handle);
-		goto end;
+		if (!ret) {
+			ret = acpi_bind_one(dev, handle);
+			if (ret)
+				goto out;
+		}
 	}
+
 	type = acpi_get_bus_type(dev->bus);
-	if (!type) {
-		DBG("No ACPI bus support for %s\n", dev_name(dev));
-		ret = -EINVAL;
-		goto end;
+	if (ret) {
+		if (!type || !type->find_device) {
+			DBG("No ACPI bus support for %s\n", dev_name(dev));
+			ret = -EINVAL;
+			goto out;
+		}
+
+		ret = type->find_device(dev, &handle);
+		if (ret) {
+			DBG("Unable to get handle for %s\n", dev_name(dev));
+			goto out;
+		}
+		ret = acpi_bind_one(dev, handle);
+		if (ret)
+			goto out;
 	}
-	if ((ret = type->find_device(dev, &handle)) != 0)
-		DBG("Can't get handler for %s\n", dev_name(dev));
- end:
-	if (!ret)
-		acpi_bind_one(dev, handle);
+
+	if (type && type->setup)
+		type->setup(dev);
 
  out:
 #if ACPI_GLUE_DEBUG
@@ -304,6 +318,12 @@ static int acpi_platform_notify(struct device *dev)
 
 static int acpi_platform_notify_remove(struct device *dev)
 {
+	struct acpi_bus_type *type;
+
+	type = acpi_get_bus_type(dev->bus);
+	if (type && type->cleanup)
+		type->cleanup(dev);
+
 	acpi_unbind_one(dev);
 	return 0;
 }

drivers/acpi/internal.h

@@ -67,6 +67,7 @@ struct acpi_ec {
 
 extern struct acpi_ec *first_ec;
 
+int acpi_pci_root_init(void);
 int acpi_ec_init(void);
 int acpi_ec_ecdt_probe(void);
 int acpi_boot_ec_enable(void);

drivers/acpi/pci_bind.c

@@ -1,122 +0,0 @@
-/*
- *  pci_bind.c - ACPI PCI Device Binding ($Revision: 2 $)
- *
- *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
- *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or (at
- *  your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful, but
- *  WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- *  General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- */
-
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/pci.h>
-#include <linux/pci-acpi.h>
-#include <linux/acpi.h>
-#include <linux/pm_runtime.h>
-#include <acpi/acpi_bus.h>
-#include <acpi/acpi_drivers.h>
-
-#define _COMPONENT		ACPI_PCI_COMPONENT
-ACPI_MODULE_NAME("pci_bind");
-
-static int acpi_pci_unbind(struct acpi_device *device)
-{
-	struct pci_dev *dev;
-
-	dev = acpi_get_pci_dev(device->handle);
-	if (!dev)
-		goto out;
-
-	device_set_run_wake(&dev->dev, false);
-	pci_acpi_remove_pm_notifier(device);
-	acpi_power_resource_unregister_device(&dev->dev, device->handle);
-
-	if (!dev->subordinate)
-		goto out;
-
-	acpi_pci_irq_del_prt(pci_domain_nr(dev->bus), dev->subordinate->number);
-
-	device->ops.bind = NULL;
-	device->ops.unbind = NULL;
-
-out:
-	pci_dev_put(dev);
-	return 0;
-}
-
-static int acpi_pci_bind(struct acpi_device *device)
-{
-	acpi_status status;
-	acpi_handle handle;
-	unsigned char bus;
-	struct pci_dev *dev;
-
-	dev = acpi_get_pci_dev(device->handle);
-	if (!dev)
-		return 0;
-
-	pci_acpi_add_pm_notifier(device, dev);
-	acpi_power_resource_register_device(&dev->dev, device->handle);
-	if (device->wakeup.flags.run_wake)
-		device_set_run_wake(&dev->dev, true);
-
-	/*
-	 * Install the 'bind' function to facilitate callbacks for
-	 * children of the P2P bridge.
-	 */
-	if (dev->subordinate) {
-		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
-				  "Device %04x:%02x:%02x.%d is a PCI bridge\n",
-				  pci_domain_nr(dev->bus), dev->bus->number,
-				  PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn)));
-		device->ops.bind = acpi_pci_bind;
-		device->ops.unbind = acpi_pci_unbind;
-	}
-
-	/*
-	 * Evaluate and parse _PRT, if exists.  This code allows parsing of
-	 * _PRT objects within the scope of non-bridge devices.  Note that
-	 * _PRTs within the scope of a PCI bridge assume the bridge's
-	 * subordinate bus number.
-	 *
-	 * TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
-	 */
-	status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle);
-	if (ACPI_FAILURE(status))
-		goto out;
-
-	if (dev->subordinate)
-		bus = dev->subordinate->number;
-	else
-		bus = dev->bus->number;
-
-	acpi_pci_irq_add_prt(device->handle, pci_domain_nr(dev->bus), bus);
-
-out:
-	pci_dev_put(dev);
-	return 0;
-}
-
-int acpi_pci_bind_root(struct acpi_device *device)
-{
-	device->ops.bind = acpi_pci_bind;
-	device->ops.unbind = acpi_pci_unbind;
-
-	return 0;
-}

drivers/acpi/pci_root.c

@@ -47,7 +47,6 @@ ACPI_MODULE_NAME("pci_root");
 #define ACPI_PCI_ROOT_DEVICE_NAME	"PCI Root Bridge"
 static int acpi_pci_root_add(struct acpi_device *device);
 static int acpi_pci_root_remove(struct acpi_device *device, int type);
-static int acpi_pci_root_start(struct acpi_device *device);
 
 #define ACPI_PCIE_REQ_SUPPORT (OSC_EXT_PCI_CONFIG_SUPPORT \
 				| OSC_ACTIVE_STATE_PWR_SUPPORT \
@@ -67,7 +66,6 @@ static struct acpi_driver acpi_pci_root_driver = {
 	.ops = {
 		.add = acpi_pci_root_add,
 		.remove = acpi_pci_root_remove,
-		.start = acpi_pci_root_start,
 		},
 };
 
@@ -188,21 +186,6 @@ static acpi_status try_get_root_bridge_busnr(acpi_handle handle,
 	return AE_OK;
 }
 
-static void acpi_pci_bridge_scan(struct acpi_device *device)
-{
-	int status;
-	struct acpi_device *child = NULL;
-
-	if (device->flags.bus_address)
-		if (device->parent && device->parent->ops.bind) {
-			status = device->parent->ops.bind(device);
-			if (!status) {
-				list_for_each_entry(child, &device->children, node)
-					acpi_pci_bridge_scan(child);
-			}
-		}
-}
-
 static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766";
 
 static acpi_status acpi_pci_run_osc(acpi_handle handle,
@@ -452,7 +435,7 @@ static int acpi_pci_root_add(struct acpi_device *device)
 	int result;
 	struct acpi_pci_root *root;
 	acpi_handle handle;
-	struct acpi_device *child;
+	struct acpi_pci_driver *driver;
 	u32 flags, base_flags;
 	bool is_osc_granted = false;
 
@@ -603,21 +586,6 @@ static int acpi_pci_root_add(struct acpi_device *device)
 		goto out_del_root;
 	}
 
-	/*
-	 * Attach ACPI-PCI Context
-	 * -----------------------
-	 * Thus binding the ACPI and PCI devices.
-	 */
-	result = acpi_pci_bind_root(device);
-	if (result)
-		goto out_del_root;
-
-	/*
-	 * Scan and bind all _ADR-Based Devices
-	 */
-	list_for_each_entry(child, &device->children, node)
-		acpi_pci_bridge_scan(child);
-
 	/* ASPM setting */
 	if (is_osc_granted) {
 		if (acpi_gbl_FADT.boot_flags & ACPI_FADT_NO_ASPM)
@@ -632,24 +600,6 @@ static int acpi_pci_root_add(struct acpi_device *device)
 	if (device->wakeup.flags.run_wake)
 		device_set_run_wake(root->bus->bridge, true);
 
-	return 0;
-
-out_del_root:
-	mutex_lock(&acpi_pci_root_lock);
-	list_del(&root->node);
-	mutex_unlock(&acpi_pci_root_lock);
-
-	acpi_pci_irq_del_prt(root->segment, root->secondary.start);
-end:
-	kfree(root);
-	return result;
-}
-
-static int acpi_pci_root_start(struct acpi_device *device)
-{
-	struct acpi_pci_root *root = acpi_driver_data(device);
-	struct acpi_pci_driver *driver;
-
 	if (system_state != SYSTEM_BOOTING) {
 		pcibios_resource_survey_bus(root->bus);
 		pci_assign_unassigned_bus_resources(root->bus);
@@ -666,8 +616,17 @@ static int acpi_pci_root_start(struct acpi_device *device)
 		pci_enable_bridges(root->bus);
 
 	pci_bus_add_devices(root->bus);
-
 	return 0;
+
+out_del_root:
+	mutex_lock(&acpi_pci_root_lock);
+	list_del(&root->node);
+	mutex_unlock(&acpi_pci_root_lock);
+
+	acpi_pci_irq_del_prt(root->segment, root->secondary.start);
+end:
+	kfree(root);
+	return result;
 }
 
 static int acpi_pci_root_remove(struct acpi_device *device, int type)
@@ -701,7 +660,7 @@ static int acpi_pci_root_remove(struct acpi_device *device, int type)
 	return 0;
 }
 
-static int __init acpi_pci_root_init(void)
+int __init acpi_pci_root_init(void)
 {
 	acpi_hest_init();
 
@@ -714,5 +673,3 @@ static int __init acpi_pci_root_init(void)
 
 	return 0;
 }
-
-subsys_initcall(acpi_pci_root_init);

drivers/acpi/processor_driver.c

@@ -677,28 +677,6 @@ static int is_processor_present(acpi_handle handle)
 	return 0;
 }
 
-static
-int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device)
-{
-	acpi_handle phandle;
-	struct acpi_device *pdev;
-
-
-	if (acpi_get_parent(handle, &phandle)) {
-		return -ENODEV;
-	}
-
-	if (acpi_bus_get_device(phandle, &pdev)) {
-		return -ENODEV;
-	}
-
-	if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) {
-		return -ENODEV;
-	}
-
-	return 0;
-}
-
 static void acpi_processor_hotplug_notify(acpi_handle handle,
 					  u32 event, void *data)
 {
@@ -721,12 +699,16 @@ static void acpi_processor_hotplug_notify(acpi_handle handle,
 		if (!acpi_bus_get_device(handle, &device))
 			break;
 
-		result = acpi_processor_device_add(handle, &device);
+		result = acpi_bus_add(handle);
 		if (result) {
 			acpi_handle_err(handle, "Unable to add the device\n");
 			break;
 		}
-
+		result = acpi_bus_get_device(handle, &device);
+		if (result) {
+			acpi_handle_err(handle, "Missing device object\n");
+			break;
+		}
 		ost_code = ACPI_OST_SC_SUCCESS;
 		break;
 

drivers/acpi/scan.c

@@ -494,7 +494,8 @@ static int acpi_bus_match(struct device *dev, struct device_driver *drv)
 	struct acpi_device *acpi_dev = to_acpi_device(dev);
 	struct acpi_driver *acpi_drv = to_acpi_driver(drv);
 
-	return !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
+	return acpi_dev->flags.match_driver
+		&& !acpi_match_device_ids(acpi_dev, acpi_drv->ids);
 }
 
 static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env)
@@ -570,7 +571,6 @@ static void acpi_device_remove_notify_handler(struct acpi_device *device)
 }
 
 static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *);
-static int acpi_start_single_object(struct acpi_device *);
 static int acpi_device_probe(struct device * dev)
 {
 	struct acpi_device *acpi_dev = to_acpi_device(dev);
@@ -579,9 +579,6 @@ static int acpi_device_probe(struct device * dev)
 
 	ret = acpi_bus_driver_init(acpi_dev, acpi_drv);
 	if (!ret) {
-		if (acpi_dev->bus_ops.acpi_op_start)
-			acpi_start_single_object(acpi_dev);
-
 		if (acpi_drv->ops.notify) {
 			ret = acpi_device_install_notify_handler(acpi_dev);
 			if (ret) {
@@ -760,24 +757,6 @@ acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver)
 	return 0;
 }
 
-static int acpi_start_single_object(struct acpi_device *device)
-{
-	int result = 0;
-	struct acpi_driver *driver;
-
-
-	if (!(driver = device->driver))
-		return 0;
-
-	if (driver->ops.start) {
-		result = driver->ops.start(device);
-		if (result && driver->ops.remove)
-			driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL);
-	}
-
-	return result;
-}
-
 /**
  * acpi_bus_register_driver - register a driver with the ACPI bus
  * @driver: driver being registered
@@ -1406,13 +1385,6 @@ static int acpi_bus_remove(struct acpi_device *dev, int rmdevice)
 	if (!rmdevice)
 		return 0;
 
-	/*
-	 * unbind _ADR-Based Devices when hot removal
-	 */
-	if (dev->flags.bus_address) {
-		if ((dev->parent) && (dev->parent->ops.unbind))
-			dev->parent->ops.unbind(dev);
-	}
 	acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT);
 
 	return 0;
@@ -1420,8 +1392,7 @@ static int acpi_bus_remove(struct acpi_device *dev, int rmdevice)
 
 static int acpi_add_single_object(struct acpi_device **child,
 				  acpi_handle handle, int type,
-				  unsigned long long sta,
-				  struct acpi_bus_ops *ops)
+				  unsigned long long sta, bool match_driver)
 {
 	int result;
 	struct acpi_device *device;
@@ -1437,7 +1408,6 @@ static int acpi_add_single_object(struct acpi_device **child,
 	device->device_type = type;
 	device->handle = handle;
 	device->parent = acpi_bus_get_parent(handle);
-	device->bus_ops = *ops; /* workround for not call .start */
 	STRUCT_TO_INT(device->status) = sta;
 
 	acpi_device_get_busid(device);
@@ -1488,16 +1458,9 @@ static int acpi_add_single_object(struct acpi_device **child,
 	if ((result = acpi_device_set_context(device)))
 		goto end;
 
+	device->flags.match_driver = match_driver;
 	result = acpi_device_register(device);
 
-	/*
-	 * Bind _ADR-Based Devices when hot add
-	 */
-	if (device->flags.bus_address) {
-		if (device->parent && device->parent->ops.bind)
-			device->parent->ops.bind(device);
-	}
-
 end:
 	if (!result) {
 		acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
@@ -1519,16 +1482,12 @@ end:
 
 static void acpi_bus_add_power_resource(acpi_handle handle)
 {
-	struct acpi_bus_ops ops = {
-		.acpi_op_add = 1,
-		.acpi_op_start = 1,
-	};
 	struct acpi_device *device = NULL;
 
 	acpi_bus_get_device(handle, &device);
 	if (!device)
 		acpi_add_single_object(&device, handle, ACPI_BUS_TYPE_POWER,
-					ACPI_STA_DEFAULT, &ops);
+					ACPI_STA_DEFAULT, true);
 }
 
 static int acpi_bus_type_and_status(acpi_handle handle, int *type,
@@ -1570,16 +1529,19 @@ static int acpi_bus_type_and_status(acpi_handle handle, int *type,
 	return 0;
 }
 
-static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl,
-				      void *context, void **return_value)
+static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
+				      void *not_used, void **return_value)
 {
-	struct acpi_bus_ops *ops = context;
+	struct acpi_device *device = NULL;
 	int type;
 	unsigned long long sta;
-	struct acpi_device *device;
 	acpi_status status;
 	int result;
 
+	acpi_bus_get_device(handle, &device);
+	if (device)
+		goto out;
+
 	result = acpi_bus_type_and_status(handle, &type, &sta);
 	if (result)
 		return AE_OK;
@@ -1596,97 +1558,89 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl,
 		return AE_CTRL_DEPTH;
 	}
 
-	/*
-	 * We may already have an acpi_device from a previous enumeration.  If
-	 * so, we needn't add it again, but we may still have to start it.
-	 */
-	device = NULL;
-	acpi_bus_get_device(handle, &device);
-	if (ops->acpi_op_add && !device) {
-		acpi_add_single_object(&device, handle, type, sta, ops);
-		/* Is the device a known good platform device? */
-		if (device
-		    && !acpi_match_device_ids(device, acpi_platform_device_ids))
-			acpi_create_platform_device(device);
-	}
-
+	acpi_add_single_object(&device, handle, type, sta,
+			       type == ACPI_BUS_TYPE_POWER);
 	if (!device)
 		return AE_CTRL_DEPTH;
 
-	if (ops->acpi_op_start && !(ops->acpi_op_add)) {
-		status = acpi_start_single_object(device);
-		if (ACPI_FAILURE(status))
-			return AE_CTRL_DEPTH;
-	}
+	device->flags.match_driver = true;
 
+ out:
 	if (!*return_value)
 		*return_value = device;
+
 	return AE_OK;
 }
 
-static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops,
-			 struct acpi_device **child)
+static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used,
+					  void *not_used, void **ret_not_used)
 {
-	acpi_status status;
-	void *device = NULL;
+	acpi_status status = AE_OK;
+	struct acpi_device *device;
+	unsigned long long sta_not_used;
+	int type_not_used;
 
-	status = acpi_bus_check_add(handle, 0, ops, &device);
-	if (ACPI_SUCCESS(status))
-		acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
-				    acpi_bus_check_add, NULL, ops, &device);
+	/*
+	 * Ignore errors ignored by acpi_bus_check_add() to avoid terminating
+	 * namespace walks prematurely.
+	 */
+	if (acpi_bus_type_and_status(handle, &type_not_used, &sta_not_used))
+		return AE_OK;
 
-	if (child)
-		*child = device;
+	if (acpi_bus_get_device(handle, &device))
+		return AE_CTRL_DEPTH;
 
-	if (device)
-		return 0;
-	else
-		return -ENODEV;
+	if (!acpi_match_device_ids(device, acpi_platform_device_ids)) {
+		/* This is a known good platform device. */
+		acpi_create_platform_device(device);
+	} else if (device_attach(&device->dev)) {
+		status = AE_CTRL_DEPTH;
+	}
+	return status;
 }
 
-/*
- * acpi_bus_add and acpi_bus_start
- *
- * scan a given ACPI tree and (probably recently hot-plugged)
- * create and add or starts found devices.
- *
- * If no devices were found -ENODEV is returned which does not
- * mean that this is a real error, there just have been no suitable
- * ACPI objects in the table trunk from which the kernel could create
- * a device and add/start an appropriate driver.
- */
-
-int
-acpi_bus_add(struct acpi_device **child,
-	     struct acpi_device *parent, acpi_handle handle, int type)
+static int acpi_bus_scan(acpi_handle handle)
 {
-	struct acpi_bus_ops ops;
+	void *device = NULL;
 
-	memset(&ops, 0, sizeof(ops));
-	ops.acpi_op_add = 1;
+	if (ACPI_SUCCESS(acpi_bus_check_add(handle, 0, NULL, &device)))
+		acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
+				    acpi_bus_check_add, NULL, NULL, &device);
 
-	return acpi_bus_scan(handle, &ops, child);
-}
-EXPORT_SYMBOL(acpi_bus_add);
+	if (!device)
+		return -ENODEV;
 
-int acpi_bus_start(struct acpi_device *device)
-{
-	struct acpi_bus_ops ops;
-	int result;
+	if (ACPI_SUCCESS(acpi_bus_device_attach(handle, 0, NULL, NULL)))
+		acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
+				    acpi_bus_device_attach, NULL, NULL, NULL);
 
-	if (!device)
-		return -EINVAL;
+	return 0;
+}
 
-	memset(&ops, 0, sizeof(ops));
-	ops.acpi_op_start = 1;
+/**
+ * acpi_bus_add - Add ACPI device node objects in a given namespace scope.
+ * @handle: Root of the namespace scope to scan.
+ *
+ * Scan a given ACPI tree (probably recently hot-plugged) and create and add
+ * found devices.
+ *
+ * If no devices were found, -ENODEV is returned, but it does not mean that
+ * there has been a real error.  There just have been no suitable ACPI objects
+ * in the table trunk from which the kernel could create a device and add an
+ * appropriate driver.
+ */
+int acpi_bus_add(acpi_handle handle)
+{
+	int err;
 
-	result = acpi_bus_scan(device->handle, &ops, NULL);
+	err = acpi_bus_scan(handle);
+	if (err)
+		return err;
 
 	acpi_update_all_gpes();
-
-	return result;
+	return 0;
 }
-EXPORT_SYMBOL(acpi_bus_start);
+EXPORT_SYMBOL(acpi_bus_add);
 
 int acpi_bus_trim(struct acpi_device *start, int rmdevice)
 {
@@ -1747,11 +1701,6 @@ static int acpi_bus_scan_fixed(void)
 {
 	int result = 0;
 	struct acpi_device *device = NULL;
-	struct acpi_bus_ops ops;
-
-	memset(&ops, 0, sizeof(ops));
-	ops.acpi_op_add = 1;
-	ops.acpi_op_start = 1;
 
 	/*
 	 * Enumerate all fixed-feature devices.
@@ -1759,16 +1708,14 @@ static int acpi_bus_scan_fixed(void)
 	if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) {
 		result = acpi_add_single_object(&device, NULL,
 						ACPI_BUS_TYPE_POWER_BUTTON,
-						ACPI_STA_DEFAULT,
-						&ops);
+						ACPI_STA_DEFAULT, true);
 		device_init_wakeup(&device->dev, true);
 	}
 
 	if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
 		result = acpi_add_single_object(&device, NULL,
 						ACPI_BUS_TYPE_SLEEP_BUTTON,
-						ACPI_STA_DEFAULT,
-						&ops);
+						ACPI_STA_DEFAULT, true);
 	}
 
 	return result;
@@ -1777,11 +1724,6 @@ static int acpi_bus_scan_fixed(void)
 int __init acpi_scan_init(void)
 {
 	int result;
-	struct acpi_bus_ops ops;
-
-	memset(&ops, 0, sizeof(ops));
-	ops.acpi_op_add = 1;
-	ops.acpi_op_start = 1;
 
 	result = bus_register(&acpi_bus_type);
 	if (result) {
@@ -1790,12 +1732,16 @@ int __init acpi_scan_init(void)
 	}
 
 	acpi_power_init();
+	acpi_pci_root_init();
 
 	/*
 	 * Enumerate devices in the ACPI namespace.
 	 */
-	result = acpi_bus_scan(ACPI_ROOT_OBJECT, &ops, &acpi_root);
+	result = acpi_bus_scan(ACPI_ROOT_OBJECT);
+	if (result)
+		return result;
 
+	result = acpi_bus_get_device(ACPI_ROOT_OBJECT, &acpi_root);
 	if (!result)
 		result = acpi_bus_scan_fixed();
 

drivers/pci/hotplug/acpiphp_glue.c

@@ -734,15 +734,9 @@ static unsigned char acpiphp_max_busnr(struct pci_bus *bus)
  */
 static int acpiphp_bus_add(struct acpiphp_func *func)
 {
-	acpi_handle phandle;
-	struct acpi_device *device, *pdevice;
+	struct acpi_device *device;
 	int ret_val;
 
-	acpi_get_parent(func->handle, &phandle);
-	if (acpi_bus_get_device(phandle, &pdevice)) {
-		dbg("no parent device, assuming NULL\n");
-		pdevice = NULL;
-	}
 	if (!acpi_bus_get_device(func->handle, &device)) {
 		dbg("bus exists... trim\n");
 		/* this shouldn't be in here, so remove
@@ -752,16 +746,13 @@ static int acpiphp_bus_add(struct acpiphp_func *func)
 		dbg("acpi_bus_trim return %x\n", ret_val);
 	}
 
-	ret_val = acpi_bus_add(&device, pdevice, func->handle,
-		ACPI_BUS_TYPE_DEVICE);
-	if (ret_val) {
-		dbg("error adding bus, %x\n",
-			-ret_val);
-		goto acpiphp_bus_add_out;
-	}
-	ret_val = acpi_bus_start(device);
+	ret_val = acpi_bus_add(func->handle);
+	if (!ret_val)
+		ret_val = acpi_bus_get_device(func->handle, &device);
+
+	if (ret_val)
+		dbg("error adding bus, %x\n", -ret_val);
 
-acpiphp_bus_add_out:
 	return ret_val;
 }
 
@@ -1130,8 +1121,7 @@ static int acpiphp_configure_bridge (acpi_handle handle)
 
 static void handle_bridge_insertion(acpi_handle handle, u32 type)
 {
-	struct acpi_device *device, *pdevice;
-	acpi_handle phandle;
+	struct acpi_device *device;
 
 	if ((type != ACPI_NOTIFY_BUS_CHECK) &&
 			(type != ACPI_NOTIFY_DEVICE_CHECK)) {
@@ -1139,17 +1129,15 @@ static void handle_bridge_insertion(acpi_handle handle, u32 type)
 		return;
 	}
 
-	acpi_get_parent(handle, &phandle);
-	if (acpi_bus_get_device(phandle, &pdevice)) {
-		dbg("no parent device, assuming NULL\n");
-		pdevice = NULL;
-	}
-	if (acpi_bus_add(&device, pdevice, handle, ACPI_BUS_TYPE_DEVICE)) {
+	if (acpi_bus_add(handle)) {
 		err("cannot add bridge to acpi list\n");
 		return;
 	}
-	if (!acpiphp_configure_bridge(handle) &&
-		!acpi_bus_start(device))
+	if (acpi_bus_get_device(handle, &device)) {
+		err("ACPI device object missing\n");
+		return;
+	}
+	if (!acpiphp_configure_bridge(handle))
 		add_bridge(handle);
 	else
 		err("cannot configure and start bridge\n");

drivers/pci/hotplug/sgi_hotplug.c

@@ -412,7 +412,6 @@ static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
 	if (SN_ACPI_BASE_SUPPORT() && ssdt) {
 		unsigned long long adr;
 		struct acpi_device *pdevice;
-		struct acpi_device *device;
 		acpi_handle phandle;
 		acpi_handle chandle = NULL;
 		acpi_handle rethandle;
@@ -448,8 +447,7 @@ static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
 			if (ACPI_SUCCESS(ret) &&
 			    (adr>>16) == (slot->device_num + 1)) {
 
-				ret = acpi_bus_add(&device, pdevice, chandle,
-						   ACPI_BUS_TYPE_DEVICE);
+				ret = acpi_bus_add(chandle);
 				if (ACPI_FAILURE(ret)) {
 					printk(KERN_ERR "%s: acpi_bus_add "
 					       "failed (0x%x) for slot %d "
@@ -457,8 +455,6 @@ static int enable_slot(struct hotplug_slot *bss_hotplug_slot)
 					       ret, (int)(adr>>16),
 					       (int)(adr&0xffff));
 					/* try to continue on */
-				} else {
-					acpi_bus_start(device);
 				}
 			}
 		}

drivers/pci/pci-acpi.c

@@ -283,7 +283,6 @@ static struct pci_platform_pm_ops acpi_pci_platform_pm = {
 	.is_manageable = acpi_pci_power_manageable,
 	.set_state = acpi_pci_set_power_state,
 	.choose_state = acpi_pci_choose_state,
-	.can_wakeup = acpi_pci_can_wakeup,
 	.sleep_wake = acpi_pci_sleep_wake,
 	.run_wake = acpi_pci_run_wake,
 };
@@ -321,10 +320,67 @@ static int acpi_pci_find_root_bridge(struct device *dev, acpi_handle *handle)
 	return 0;
 }
 
+static void pci_acpi_setup(struct device *dev)
+{
+	struct pci_dev *pci_dev = to_pci_dev(dev);
+	acpi_handle handle = ACPI_HANDLE(dev);
+	struct acpi_device *adev;
+	acpi_status status;
+	acpi_handle dummy;
+
+	/*
+	 * Evaluate and parse _PRT, if exists.  This code allows parsing of
+	 * _PRT objects within the scope of non-bridge devices.  Note that
+	 * _PRTs within the scope of a PCI bridge assume the bridge's
+	 * subordinate bus number.
+	 *
+	 * TBD: Can _PRTs exist within the scope of non-bridge PCI devices?
+	 */
+	status = acpi_get_handle(handle, METHOD_NAME__PRT, &dummy);
+	if (ACPI_SUCCESS(status)) {
+		unsigned char bus;
+
+		bus = pci_dev->subordinate ?
+			pci_dev->subordinate->number : pci_dev->bus->number;
+		acpi_pci_irq_add_prt(handle, pci_domain_nr(pci_dev->bus), bus);
+	}
+
+	acpi_power_resource_register_device(dev, handle);
+	if (acpi_bus_get_device(handle, &adev) || !adev->wakeup.flags.valid)
+		return;
+
+	device_set_wakeup_capable(dev, true);
+	acpi_pci_sleep_wake(pci_dev, false);
+
+	pci_acpi_add_pm_notifier(adev, pci_dev);
+	if (adev->wakeup.flags.run_wake)
+		device_set_run_wake(dev, true);
+}
+
+static void pci_acpi_cleanup(struct device *dev)
+{
+	struct pci_dev *pci_dev = to_pci_dev(dev);
+	acpi_handle handle = ACPI_HANDLE(dev);
+	struct acpi_device *adev;
+
+	if (!acpi_bus_get_device(handle, &adev) && adev->wakeup.flags.valid) {
+		device_set_wakeup_capable(dev, false);
+		device_set_run_wake(dev, false);
+		pci_acpi_remove_pm_notifier(adev);
+	}
+	acpi_power_resource_unregister_device(dev, handle);
+
+	if (pci_dev->subordinate)
+		acpi_pci_irq_del_prt(pci_domain_nr(pci_dev->bus),
+				     pci_dev->subordinate->number);
+}
+
 static struct acpi_bus_type acpi_pci_bus = {
 	.bus = &pci_bus_type,
 	.find_device = acpi_pci_find_device,
 	.find_bridge = acpi_pci_find_root_bridge,
+	.setup = pci_acpi_setup,
+	.cleanup = pci_acpi_cleanup,
 };
 
 static int __init acpi_pci_init(void)

drivers/pci/pci.c

@@ -450,7 +450,7 @@ static struct pci_platform_pm_ops *pci_platform_pm;
 int pci_set_platform_pm(struct pci_platform_pm_ops *ops)
 {
 	if (!ops->is_manageable || !ops->set_state || !ops->choose_state
-	    || !ops->sleep_wake || !ops->can_wakeup)
+	    || !ops->sleep_wake)
 		return -EINVAL;
 	pci_platform_pm = ops;
 	return 0;
@@ -473,11 +473,6 @@ static inline pci_power_t platform_pci_choose_state(struct pci_dev *dev)
 			pci_platform_pm->choose_state(dev) : PCI_POWER_ERROR;
 }
 
-static inline bool platform_pci_can_wakeup(struct pci_dev *dev)
-{
-	return pci_platform_pm ? pci_platform_pm->can_wakeup(dev) : false;
-}
-
 static inline int platform_pci_sleep_wake(struct pci_dev *dev, bool enable)
 {
 	return pci_platform_pm ?
@@ -1984,25 +1979,6 @@ void pci_pm_init(struct pci_dev *dev)
 	}
 }
 
-/**
- * platform_pci_wakeup_init - init platform wakeup if present
- * @dev: PCI device
- *
- * Some devices don't have PCI PM caps but can still generate wakeup
- * events through platform methods (like ACPI events).  If @dev supports
- * platform wakeup events, set the device flag to indicate as much.  This
- * may be redundant if the device also supports PCI PM caps, but double
- * initialization should be safe in that case.
- */
-void platform_pci_wakeup_init(struct pci_dev *dev)
-{
-	if (!platform_pci_can_wakeup(dev))
-		return;
-
-	device_set_wakeup_capable(&dev->dev, true);
-	platform_pci_sleep_wake(dev, false);
-}
-
 static void pci_add_saved_cap(struct pci_dev *pci_dev,
 	struct pci_cap_saved_state *new_cap)
 {

drivers/pci/pci.h

@@ -43,9 +43,6 @@ int pci_probe_reset_function(struct pci_dev *dev);
  *                platform; to be used during system-wide transitions from a
  *                sleeping state to the working state and vice versa
  *
- * @can_wakeup: returns 'true' if given device is capable of waking up the
- *              system from a sleeping state
- *
  * @sleep_wake: enables/disables the system wake up capability of given device
  *
  * @run_wake: enables/disables the platform to generate run-time wake-up events
@@ -59,7 +56,6 @@ struct pci_platform_pm_ops {
 	bool (*is_manageable)(struct pci_dev *dev);
 	int (*set_state)(struct pci_dev *dev, pci_power_t state);
 	pci_power_t (*choose_state)(struct pci_dev *dev);
-	bool (*can_wakeup)(struct pci_dev *dev);
 	int (*sleep_wake)(struct pci_dev *dev, bool enable);
 	int (*run_wake)(struct pci_dev *dev, bool enable);
 };
@@ -74,7 +70,6 @@ extern void pci_wakeup_bus(struct pci_bus *bus);
 extern void pci_config_pm_runtime_get(struct pci_dev *dev);
 extern void pci_config_pm_runtime_put(struct pci_dev *dev);
 extern void pci_pm_init(struct pci_dev *dev);
-extern void platform_pci_wakeup_init(struct pci_dev *dev);
 extern void pci_allocate_cap_save_buffers(struct pci_dev *dev);
 void pci_free_cap_save_buffers(struct pci_dev *dev);
 

drivers/pci/probe.c

@@ -1280,7 +1280,6 @@ static void pci_init_capabilities(struct pci_dev *dev)
 
 	/* Power Management */
 	pci_pm_init(dev);
-	platform_pci_wakeup_init(dev);
 
 	/* Vital Product Data */
 	pci_vpd_pci22_init(dev);

include/acpi/acpi_bus.h

@@ -95,17 +95,10 @@ typedef int (*acpi_op_bind) (struct acpi_device * device);
 typedef int (*acpi_op_unbind) (struct acpi_device * device);
 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
 
-struct acpi_bus_ops {
-	u32 acpi_op_add:1;
-	u32 acpi_op_start:1;
-};
-
 struct acpi_device_ops {
 	acpi_op_add add;
 	acpi_op_remove remove;
 	acpi_op_start start;
-	acpi_op_bind bind;
-	acpi_op_unbind unbind;
 	acpi_op_notify notify;
 };
 
@@ -148,7 +141,8 @@ struct acpi_device_flags {
 	u32 power_manageable:1;
 	u32 performance_manageable:1;
 	u32 eject_pending:1;
-	u32 reserved:24;
+	u32 match_driver:1;
+	u32 reserved:23;
 };
 
 /* File System */
@@ -283,7 +277,6 @@ struct acpi_device {
 	struct acpi_driver *driver;
 	void *driver_data;
 	struct device dev;
-	struct acpi_bus_ops bus_ops;	/* workaround for different code path for hotplug */
 	enum acpi_bus_removal_type removal_type;	/* indicate for different removal type */
 	u8 physical_node_count;
 	struct list_head physical_node_list;
@@ -356,11 +349,9 @@ static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 ty
 #endif
 int acpi_bus_register_driver(struct acpi_driver *driver);
 void acpi_bus_unregister_driver(struct acpi_driver *driver);
-int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent,
-		 acpi_handle handle, int type);
+int acpi_bus_add(acpi_handle handle);
 void acpi_bus_hot_remove_device(void *context);
 int acpi_bus_trim(struct acpi_device *start, int rmdevice);
-int acpi_bus_start(struct acpi_device *device);
 acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
 int acpi_match_device_ids(struct acpi_device *device,
 			  const struct acpi_device_id *ids);
@@ -390,6 +381,8 @@ struct acpi_bus_type {
 	int (*find_device) (struct device *, acpi_handle *);
 	/* For bridges, such as PCI root bridge, IDE controller */
 	int (*find_bridge) (struct device *, acpi_handle *);
+	void (*setup)(struct device *);
+	void (*cleanup)(struct device *);
 };
 int register_acpi_bus_type(struct acpi_bus_type *);
 int unregister_acpi_bus_type(struct acpi_bus_type *);
@@ -397,7 +390,6 @@ int unregister_acpi_bus_type(struct acpi_bus_type *);
 struct acpi_pci_root {
 	struct list_head node;
 	struct acpi_device * device;
-	struct acpi_pci_id id;
 	struct pci_bus *bus;
 	u16 segment;
 	struct resource secondary;	/* downstream bus range */

include/linux/acpi.h

@@ -526,9 +526,14 @@ static inline int acpi_subsys_resume_early(struct device *dev) { return 0; }
 #endif
 
 #if defined(CONFIG_ACPI) && defined(CONFIG_PM)
+struct acpi_device *acpi_dev_pm_get_node(struct device *dev);
 int acpi_dev_pm_attach(struct device *dev, bool power_on);
 void acpi_dev_pm_detach(struct device *dev, bool power_off);
 #else
+static inline struct acpi_device *acpi_dev_pm_get_node(struct device *dev)
+{
+	return NULL;
+}
 static inline int acpi_dev_pm_attach(struct device *dev, bool power_on)
 {
 	return -ENODEV;