[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / glue.c

/*
 * Link physical devices with ACPI devices support
 *
 * Copyright (c) 2005 David Shaohua Li <shaohua.li@intel.com>
 * Copyright (c) 2005 Intel Corp.
 *
 * This file is released under the GPLv2.
 */
#include <linux/export.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/rwsem.h>
#include <linux/acpi.h>

#include "internal.h"

#define ACPI_GLUE_DEBUG	0
#if ACPI_GLUE_DEBUG
#define DBG(fmt, ...)						\
	printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__)
#else
#define DBG(fmt, ...)						\
do {								\
	if (0)							\
		printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__);	\
} while (0)
#endif
static LIST_HEAD(bus_type_list);
static DECLARE_RWSEM(bus_type_sem);

#define PHYSICAL_NODE_STRING "physical_node"

int register_acpi_bus_type(struct acpi_bus_type *type)
{
	if (acpi_disabled)
		return -ENODEV;
	if (type && type->match && type->find_device) {
		down_write(&bus_type_sem);
		list_add_tail(&type->list, &bus_type_list);
		up_write(&bus_type_sem);
		printk(KERN_INFO PREFIX "bus type %s registered\n", type->name);
		return 0;
	}
	return -ENODEV;
}
EXPORT_SYMBOL_GPL(register_acpi_bus_type);

int unregister_acpi_bus_type(struct acpi_bus_type *type)
{
	if (acpi_disabled)
		return 0;
	if (type) {
		down_write(&bus_type_sem);
		list_del_init(&type->list);
		up_write(&bus_type_sem);
		printk(KERN_INFO PREFIX "bus type %s unregistered\n",
		       type->name);
		return 0;
	}
	return -ENODEV;
}
EXPORT_SYMBOL_GPL(unregister_acpi_bus_type);

static struct acpi_bus_type *acpi_get_bus_type(struct device *dev)
{
	struct acpi_bus_type *tmp, *ret = NULL;

	down_read(&bus_type_sem);
	list_for_each_entry(tmp, &bus_type_list, list) {
		if (tmp->match(dev)) {
			ret = tmp;
			break;
		}
	}
	up_read(&bus_type_sem);
	return ret;
}

static acpi_status acpi_dev_present(acpi_handle handle, u32 lvl_not_used,
				  void *not_used, void **ret_p)
{
	struct acpi_device *adev = NULL;

	acpi_bus_get_device(handle, &adev);
	if (adev) {
		*ret_p = handle;
		return AE_CTRL_TERMINATE;
	}
	return AE_OK;
}

static bool acpi_extra_checks_passed(acpi_handle handle, bool is_bridge)
{
	unsigned long long sta;
	acpi_status status;

	status = acpi_bus_get_status_handle(handle, &sta);
	if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_ENABLED))
		return false;

	if (is_bridge) {
		void *test = NULL;

		/* Check if this object has at least one child device. */
		acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
				    acpi_dev_present, NULL, NULL, &test);
		return !!test;
	}
	return true;
}

struct find_child_context {
	u64 addr;
	bool is_bridge;
	acpi_handle ret;
	bool ret_checked;
};

static acpi_status do_find_child(acpi_handle handle, u32 lvl_not_used,
				 void *data, void **not_used)
{
	struct find_child_context *context = data;
	unsigned long long addr;
	acpi_status status;

	status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &addr);
	if (ACPI_FAILURE(status) || addr != context->addr)
		return AE_OK;

	if (!context->ret) {
		/* This is the first matching object.  Save its handle. */
		context->ret = handle;
		return AE_OK;
	}
	/*
	 * There is more than one matching object with the same _ADR value.
	 * That really is unexpected, so we are kind of beyond the scope of the
	 * spec here.  We have to choose which one to return, though.
	 *
	 * First, check if the previously found object is good enough and return
	 * its handle if so.  Second, check the same for the object that we've
	 * just found.
	 */
	if (!context->ret_checked) {
		if (acpi_extra_checks_passed(context->ret, context->is_bridge))
			return AE_CTRL_TERMINATE;
		else
			context->ret_checked = true;
	}
	if (acpi_extra_checks_passed(handle, context->is_bridge)) {
		context->ret = handle;
		return AE_CTRL_TERMINATE;
	}
	return AE_OK;
}

acpi_handle acpi_find_child(acpi_handle parent, u64 addr, bool is_bridge)
{
	if (parent) {
		struct find_child_context context = {
			.addr = addr,
			.is_bridge = is_bridge,
		};

		acpi_walk_namespace(ACPI_TYPE_DEVICE, parent, 1, do_find_child,
				    NULL, &context, NULL);
		return context.ret;
	}
	return NULL;
}
EXPORT_SYMBOL_GPL(acpi_find_child);

static int acpi_bind_one(struct device *dev, acpi_handle handle)
{
	struct acpi_device *acpi_dev;
	acpi_status status;
	struct acpi_device_physical_node *physical_node, *pn;
	char physical_node_name[sizeof(PHYSICAL_NODE_STRING) + 2];
	int retval = -EINVAL;

	if (ACPI_HANDLE(dev)) {
		if (handle) {
			dev_warn(dev, "ACPI handle is already set\n");
			return -EINVAL;
		} else {
			handle = ACPI_HANDLE(dev);
		}
	}
	if (!handle)
		return -EINVAL;

	get_device(dev);
	status = acpi_bus_get_device(handle, &acpi_dev);
	if (ACPI_FAILURE(status))
		goto err;

	physical_node = kzalloc(sizeof(*physical_node), GFP_KERNEL);
	if (!physical_node) {
		retval = -ENOMEM;
		goto err;
	}

	mutex_lock(&acpi_dev->physical_node_lock);

	/* Sanity check. */
	list_for_each_entry(pn, &acpi_dev->physical_node_list, node)
		if (pn->dev == dev) {
			dev_warn(dev, "Already associated with ACPI node\n");
			goto err_free;
		}

	/* allocate physical node id according to physical_node_id_bitmap */
	physical_node->node_id =
		find_first_zero_bit(acpi_dev->physical_node_id_bitmap,
		ACPI_MAX_PHYSICAL_NODE);
	if (physical_node->node_id >= ACPI_MAX_PHYSICAL_NODE) {
		retval = -ENOSPC;
		goto err_free;
	}

	set_bit(physical_node->node_id, acpi_dev->physical_node_id_bitmap);
	physical_node->dev = dev;
	list_add_tail(&physical_node->node, &acpi_dev->physical_node_list);
	acpi_dev->physical_node_count++;

	mutex_unlock(&acpi_dev->physical_node_lock);

	if (!ACPI_HANDLE(dev))
		ACPI_HANDLE_SET(dev, acpi_dev->handle);

	if (!physical_node->node_id)
		strcpy(physical_node_name, PHYSICAL_NODE_STRING);
	else
		sprintf(physical_node_name,
			"physical_node%d", physical_node->node_id);
	retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
			physical_node_name);
	retval = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
		"firmware_node");

	if (acpi_dev->wakeup.flags.valid)
		device_set_wakeup_capable(dev, true);

	return 0;

 err:
	ACPI_HANDLE_SET(dev, NULL);
	put_device(dev);
	return retval;

 err_free:
	mutex_unlock(&acpi_dev->physical_node_lock);
	kfree(physical_node);
	goto err;
}

static int acpi_unbind_one(struct device *dev)
{
	struct acpi_device_physical_node *entry;
	struct acpi_device *acpi_dev;
	acpi_status status;
	struct list_head *node, *next;

	if (!ACPI_HANDLE(dev))
		return 0;

	status = acpi_bus_get_device(ACPI_HANDLE(dev), &acpi_dev);
	if (ACPI_FAILURE(status))
		goto err;

	mutex_lock(&acpi_dev->physical_node_lock);
	list_for_each_safe(node, next, &acpi_dev->physical_node_list) {
		char physical_node_name[sizeof(PHYSICAL_NODE_STRING) + 2];

		entry = list_entry(node, struct acpi_device_physical_node,
			node);
		if (entry->dev != dev)
			continue;

		list_del(node);
		clear_bit(entry->node_id, acpi_dev->physical_node_id_bitmap);

		acpi_dev->physical_node_count--;

		if (!entry->node_id)
			strcpy(physical_node_name, PHYSICAL_NODE_STRING);
		else
			sprintf(physical_node_name,
				"physical_node%d", entry->node_id);

		sysfs_remove_link(&acpi_dev->dev.kobj, physical_node_name);
		sysfs_remove_link(&dev->kobj, "firmware_node");
		ACPI_HANDLE_SET(dev, NULL);
		/* acpi_bind_one increase refcnt by one */
		put_device(dev);
		kfree(entry);
	}
	mutex_unlock(&acpi_dev->physical_node_lock);

	return 0;

err:
	dev_err(dev, "Oops, 'acpi_handle' corrupt\n");
	return -EINVAL;
}

static int acpi_platform_notify(struct device *dev)
{
	struct acpi_bus_type *type = acpi_get_bus_type(dev);
	acpi_handle handle;
	int ret;

	ret = acpi_bind_one(dev, NULL);
	if (ret && type) {
		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 (type && type->setup)
		type->setup(dev);

 out:
#if ACPI_GLUE_DEBUG
	if (!ret) {
		struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };

		acpi_get_name(ACPI_HANDLE(dev), ACPI_FULL_PATHNAME, &buffer);
		DBG("Device %s -> %s\n", dev_name(dev), (char *)buffer.pointer);
		kfree(buffer.pointer);
	} else
		DBG("Device %s -> No ACPI support\n", dev_name(dev));
#endif

	return ret;
}

static int acpi_platform_notify_remove(struct device *dev)
{
	struct acpi_bus_type *type;

	type = acpi_get_bus_type(dev);
	if (type && type->cleanup)
		type->cleanup(dev);

	acpi_unbind_one(dev);
	return 0;
}

int __init init_acpi_device_notify(void)
{
	if (platform_notify || platform_notify_remove) {
		printk(KERN_ERR PREFIX "Can't use platform_notify\n");
		return 0;
	}
	platform_notify = acpi_platform_notify;
	platform_notify_remove = acpi_platform_notify_remove;
	return 0;
}
Commit	Line	Data
4e10d12a DSL	1	/*
	2	* Link physical devices with ACPI devices support
	3	*
	4	* Copyright (c) 2005 David Shaohua Li <shaohua.li@intel.com>
	5	* Copyright (c) 2005 Intel Corp.
	6	*
	7	* This file is released under the GPLv2.
	8	*/
214f2c90	9	#include <linux/export.h>
4e10d12a DSL	10	#include <linux/init.h>
	11	#include <linux/list.h>
	12	#include <linux/device.h>
5a0e3ad6	13	#include <linux/slab.h>
4e10d12a DSL	14	#include <linux/rwsem.h>
	15	#include <linux/acpi.h>
	16
a192a958 LB	17	#include "internal.h"
a192a958 LB	18
4e10d12a DSL	19	#define ACPI_GLUE_DEBUG 0
4e10d12a DSL	20	#if ACPI_GLUE_DEBUG
23415eb5 JP	21	#define DBG(fmt, ...) \
23415eb5 JP	22	printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__)
4e10d12a	23	#else
23415eb5 JP	24	#define DBG(fmt, ...) \
	25	do { \
	26	if (0) \
	27	printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__); \
	28	} while (0)
4e10d12a DSL	29	#endif
	30	static LIST_HEAD(bus_type_list);
	31	static DECLARE_RWSEM(bus_type_sem);
	32
1033f904 LT	33	#define PHYSICAL_NODE_STRING "physical_node"
1033f904 LT	34
4e10d12a DSL	35	int register_acpi_bus_type(struct acpi_bus_type *type)
	36	{
	37	if (acpi_disabled)
	38	return -ENODEV;
53540098	39	if (type && type->match && type->find_device) {
4e10d12a DSL	40	down_write(&bus_type_sem);
	41	list_add_tail(&type->list, &bus_type_list);
	42	up_write(&bus_type_sem);
53540098	43	printk(KERN_INFO PREFIX "bus type %s registered\n", type->name);
4e10d12a DSL	44	return 0;
	45	}
	46	return -ENODEV;
	47	}
91e4d5a1	48	EXPORT_SYMBOL_GPL(register_acpi_bus_type);
4e10d12a	49
4e10d12a DSL	50	int unregister_acpi_bus_type(struct acpi_bus_type *type)
	51	{
	52	if (acpi_disabled)
	53	return 0;
	54	if (type) {
	55	down_write(&bus_type_sem);
	56	list_del_init(&type->list);
	57	up_write(&bus_type_sem);
53540098 RW	58	printk(KERN_INFO PREFIX "bus type %s unregistered\n",
53540098 RW	59	type->name);
4e10d12a DSL	60	return 0;
	61	}
	62	return -ENODEV;
	63	}
91e4d5a1	64	EXPORT_SYMBOL_GPL(unregister_acpi_bus_type);
4e10d12a	65
53540098	66	static struct acpi_bus_type acpi_get_bus_type(struct device dev)
4e10d12a DSL	67	{
	68	struct acpi_bus_type tmp, ret = NULL;
	69
	70	down_read(&bus_type_sem);
	71	list_for_each_entry(tmp, &bus_type_list, list) {
53540098	72	if (tmp->match(dev)) {
4e10d12a DSL	73	ret = tmp;
	74	break;
	75	}
	76	}
	77	up_read(&bus_type_sem);
	78	return ret;
	79	}
	80
6e4fdb80 RW	81	static acpi_status acpi_dev_present(acpi_handle handle, u32 lvl_not_used,
6e4fdb80 RW	82	void not_used, void *ret_p)
4e10d12a	83	{
6e4fdb80 RW	84	struct acpi_device *adev = NULL;
	85
	86	acpi_bus_get_device(handle, &adev);
	87	if (adev) {
	88	*ret_p = handle;
	89	return AE_CTRL_TERMINATE;
	90	}
	91	return AE_OK;
	92	}
	93
	94	static bool acpi_extra_checks_passed(acpi_handle handle, bool is_bridge)
	95	{
	96	unsigned long long sta;
	97	acpi_status status;
	98
	99	status = acpi_bus_get_status_handle(handle, &sta);
	100	if (ACPI_FAILURE(status) \|\| !(sta & ACPI_STA_DEVICE_ENABLED))
	101	return false;
	102
	103	if (is_bridge) {
	104	void *test = NULL;
	105
	106	/* Check if this object has at least one child device. */
	107	acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
	108	acpi_dev_present, NULL, NULL, &test);
	109	return !!test;
	110	}
	111	return true;
	112	}
	113
	114	struct find_child_context {
	115	u64 addr;
	116	bool is_bridge;
	117	acpi_handle ret;
	118	bool ret_checked;
	119	};
	120
	121	static acpi_status do_find_child(acpi_handle handle, u32 lvl_not_used,
	122	void data, void *not_used)
	123	{
	124	struct find_child_context *context = data;
	125	unsigned long long addr;
4e10d12a	126	acpi_status status;
33f767d7 RW	127
33f767d7 RW	128	status = acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL, &addr);
6e4fdb80 RW	129	if (ACPI_FAILURE(status) \|\| addr != context->addr)
	130	return AE_OK;
	131
	132	if (!context->ret) {
	133	/* This is the first matching object. Save its handle. */
	134	context->ret = handle;
	135	return AE_OK;
	136	}
	137	/*
	138	* There is more than one matching object with the same _ADR value.
	139	* That really is unexpected, so we are kind of beyond the scope of the
	140	* spec here. We have to choose which one to return, though.
	141	*
	142	* First, check if the previously found object is good enough and return
	143	* its handle if so. Second, check the same for the object that we've
	144	* just found.
	145	*/
	146	if (!context->ret_checked) {
	147	if (acpi_extra_checks_passed(context->ret, context->is_bridge))
2ac3b5e4	148	return AE_CTRL_TERMINATE;
6e4fdb80 RW	149	else
	150	context->ret_checked = true;
	151	}
	152	if (acpi_extra_checks_passed(handle, context->is_bridge)) {
	153	context->ret = handle;
	154	return AE_CTRL_TERMINATE;
4e10d12a DSL	155	}
	156	return AE_OK;
	157	}
	158
6e4fdb80	159	acpi_handle acpi_find_child(acpi_handle parent, u64 addr, bool is_bridge)
4e10d12a	160	{
6e4fdb80 RW	161	if (parent) {
	162	struct find_child_context context = {
	163	.addr = addr,
	164	.is_bridge = is_bridge,
	165	};
4e10d12a	166
6e4fdb80 RW	167	acpi_walk_namespace(ACPI_TYPE_DEVICE, parent, 1, do_find_child,
	168	NULL, &context, NULL);
	169	return context.ret;
	170	}
	171	return NULL;
33f767d7	172	}
6e4fdb80	173	EXPORT_SYMBOL_GPL(acpi_find_child);
4e10d12a	174
4e10d12a DSL	175	static int acpi_bind_one(struct device *dev, acpi_handle handle)
4e10d12a DSL	176	{
1071695f	177	struct acpi_device *acpi_dev;
4e10d12a	178	acpi_status status;
f3fd0c8a	179	struct acpi_device_physical_node physical_node, pn;
1033f904 LT	180	char physical_node_name[sizeof(PHYSICAL_NODE_STRING) + 2];
1033f904 LT	181	int retval = -EINVAL;
4e10d12a	182
95f8a082	183	if (ACPI_HANDLE(dev)) {
f3fd0c8a RW	184	if (handle) {
	185	dev_warn(dev, "ACPI handle is already set\n");
	186	return -EINVAL;
	187	} else {
95f8a082	188	handle = ACPI_HANDLE(dev);
f3fd0c8a	189	}
4e10d12a	190	}
f3fd0c8a RW	191	if (!handle)
f3fd0c8a RW	192	return -EINVAL;
1033f904	193
4e10d12a	194	get_device(dev);
1033f904 LT	195	status = acpi_bus_get_device(handle, &acpi_dev);
	196	if (ACPI_FAILURE(status))
	197	goto err;
	198
f3fd0c8a	199	physical_node = kzalloc(sizeof(*physical_node), GFP_KERNEL);
1033f904 LT	200	if (!physical_node) {
	201	retval = -ENOMEM;
	202	goto err;
4e10d12a	203	}
4e10d12a	204
1033f904	205	mutex_lock(&acpi_dev->physical_node_lock);
f3fd0c8a RW	206
	207	/* Sanity check. */
	208	list_for_each_entry(pn, &acpi_dev->physical_node_list, node)
	209	if (pn->dev == dev) {
	210	dev_warn(dev, "Already associated with ACPI node\n");
	211	goto err_free;
	212	}
	213
1033f904 LT	214	/* allocate physical node id according to physical_node_id_bitmap */
	215	physical_node->node_id =
	216	find_first_zero_bit(acpi_dev->physical_node_id_bitmap,
	217	ACPI_MAX_PHYSICAL_NODE);
	218	if (physical_node->node_id >= ACPI_MAX_PHYSICAL_NODE) {
	219	retval = -ENOSPC;
f3fd0c8a	220	goto err_free;
1071695f DB	221	}
1071695f DB	222
1033f904 LT	223	set_bit(physical_node->node_id, acpi_dev->physical_node_id_bitmap);
	224	physical_node->dev = dev;
	225	list_add_tail(&physical_node->node, &acpi_dev->physical_node_list);
	226	acpi_dev->physical_node_count++;
f3fd0c8a	227
1033f904 LT	228	mutex_unlock(&acpi_dev->physical_node_lock);
1033f904 LT	229
95f8a082 RW	230	if (!ACPI_HANDLE(dev))
95f8a082 RW	231	ACPI_HANDLE_SET(dev, acpi_dev->handle);
1033f904 LT	232
	233	if (!physical_node->node_id)
	234	strcpy(physical_node_name, PHYSICAL_NODE_STRING);
	235	else
	236	sprintf(physical_node_name,
	237	"physical_node%d", physical_node->node_id);
	238	retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
	239	physical_node_name);
	240	retval = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
	241	"firmware_node");
	242
	243	if (acpi_dev->wakeup.flags.valid)
	244	device_set_wakeup_capable(dev, true);
	245
4e10d12a	246	return 0;
1033f904 LT	247
1033f904 LT	248	err:
95f8a082	249	ACPI_HANDLE_SET(dev, NULL);
1033f904 LT	250	put_device(dev);
1033f904 LT	251	return retval;
f3fd0c8a RW	252
	253	err_free:
	254	mutex_unlock(&acpi_dev->physical_node_lock);
	255	kfree(physical_node);
	256	goto err;
4e10d12a DSL	257	}
	258
	259	static int acpi_unbind_one(struct device *dev)
	260	{
1033f904 LT	261	struct acpi_device_physical_node *entry;
	262	struct acpi_device *acpi_dev;
	263	acpi_status status;
	264	struct list_head node, next;
	265
95f8a082	266	if (!ACPI_HANDLE(dev))
4e10d12a	267	return 0;
1071695f	268
95f8a082	269	status = acpi_bus_get_device(ACPI_HANDLE(dev), &acpi_dev);
1033f904 LT	270	if (ACPI_FAILURE(status))
1033f904 LT	271	goto err;
1071695f	272
1033f904 LT	273	mutex_lock(&acpi_dev->physical_node_lock);
	274	list_for_each_safe(node, next, &acpi_dev->physical_node_list) {
	275	char physical_node_name[sizeof(PHYSICAL_NODE_STRING) + 2];
	276
	277	entry = list_entry(node, struct acpi_device_physical_node,
	278	node);
	279	if (entry->dev != dev)
	280	continue;
	281
	282	list_del(node);
	283	clear_bit(entry->node_id, acpi_dev->physical_node_id_bitmap);
1071695f	284
1033f904 LT	285	acpi_dev->physical_node_count--;
	286
	287	if (!entry->node_id)
	288	strcpy(physical_node_name, PHYSICAL_NODE_STRING);
	289	else
	290	sprintf(physical_node_name,
	291	"physical_node%d", entry->node_id);
	292
	293	sysfs_remove_link(&acpi_dev->dev.kobj, physical_node_name);
	294	sysfs_remove_link(&dev->kobj, "firmware_node");
95f8a082	295	ACPI_HANDLE_SET(dev, NULL);
4e10d12a DSL	296	/* acpi_bind_one increase refcnt by one */
4e10d12a DSL	297	put_device(dev);
1033f904	298	kfree(entry);
4e10d12a	299	}
1033f904 LT	300	mutex_unlock(&acpi_dev->physical_node_lock);
1033f904 LT	301
4e10d12a	302	return 0;
1033f904 LT	303
	304	err:
	305	dev_err(dev, "Oops, 'acpi_handle' corrupt\n");
	306	return -EINVAL;
4e10d12a DSL	307	}
	308
	309	static int acpi_platform_notify(struct device *dev)
	310	{
53540098	311	struct acpi_bus_type *type = acpi_get_bus_type(dev);
4e10d12a	312	acpi_handle handle;
11909ca1	313	int ret;
4e10d12a	314
f3fd0c8a	315	ret = acpi_bind_one(dev, NULL);
92414481	316	if (ret && type) {
11909ca1 RW	317	ret = type->find_device(dev, &handle);
	318	if (ret) {
	319	DBG("Unable to get handle for %s\n", dev_name(dev));
	320	goto out;
	321	}
	322	ret = acpi_bind_one(dev, handle);
	323	if (ret)
	324	goto out;
4e10d12a	325	}
11909ca1 RW	326
	327	if (type && type->setup)
	328	type->setup(dev);
4e10d12a	329
f3fd0c8a	330	out:
4e10d12a DSL	331	#if ACPI_GLUE_DEBUG
	332	if (!ret) {
	333	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	334
a412a11d	335	acpi_get_name(ACPI_HANDLE(dev), ACPI_FULL_PATHNAME, &buffer);
db1461ad	336	DBG("Device %s -> %s\n", dev_name(dev), (char *)buffer.pointer);
02438d87	337	kfree(buffer.pointer);
4e10d12a	338	} else
db1461ad	339	DBG("Device %s -> No ACPI support\n", dev_name(dev));
4e10d12a DSL	340	#endif
	341
	342	return ret;
	343	}
	344
	345	static int acpi_platform_notify_remove(struct device *dev)
	346	{
11909ca1 RW	347	struct acpi_bus_type *type;
11909ca1 RW	348
53540098	349	type = acpi_get_bus_type(dev);
11909ca1 RW	350	if (type && type->cleanup)
	351	type->cleanup(dev);
	352
4e10d12a DSL	353	acpi_unbind_one(dev);
	354	return 0;
	355	}
	356
0e46517d	357	int __init init_acpi_device_notify(void)
4e10d12a	358	{
4e10d12a DSL	359	if (platform_notify \|\| platform_notify_remove) {
	360	printk(KERN_ERR PREFIX "Can't use platform_notify\n");
	361	return 0;
	362	}
	363	platform_notify = acpi_platform_notify;
	364	platform_notify_remove = acpi_platform_notify_remove;
	365	return 0;
	366	}