[mirror_ubuntu-artful-kernel.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 <linux/dma-mapping.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"
#define PHYSICAL_NODE_NAME_SIZE (sizeof(PHYSICAL_NODE_STRING) + 10)

int register_acpi_bus_type(struct acpi_bus_type *type)
{
	if (acpi_disabled)
		return -ENODEV;
	if (type && type->match && type->find_companion) {
		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;
}

#define FIND_CHILD_MIN_SCORE	1
#define FIND_CHILD_MAX_SCORE	2

static int find_child_checks(struct acpi_device *adev, bool check_children)
{
	bool sta_present = true;
	unsigned long long sta;
	acpi_status status;

	status = acpi_evaluate_integer(adev->handle, "_STA", NULL, &sta);
	if (status == AE_NOT_FOUND)
		sta_present = false;
	else if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_ENABLED))
		return -ENODEV;

	if (check_children && list_empty(&adev->children))
		return -ENODEV;

	/*
	 * If the device has a _HID (or _CID) returning a valid ACPI/PNP
	 * device ID, it is better to make it look less attractive here, so that
	 * the other device with the same _ADR value (that may not have a valid
	 * device ID) can be matched going forward.  [This means a second spec
	 * violation in a row, so whatever we do here is best effort anyway.]
	 */
	return sta_present && list_empty(&adev->pnp.ids) ?
			FIND_CHILD_MAX_SCORE : FIND_CHILD_MIN_SCORE;
}

struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
					   u64 address, bool check_children)
{
	struct acpi_device *adev, *ret = NULL;
	int ret_score = 0;

	if (!parent)
		return NULL;

	list_for_each_entry(adev, &parent->children, node) {
		unsigned long long addr;
		acpi_status status;
		int score;

		status = acpi_evaluate_integer(adev->handle, METHOD_NAME__ADR,
					       NULL, &addr);
		if (ACPI_FAILURE(status) || addr != address)
			continue;

		if (!ret) {
			/* This is the first matching object.  Save it. */
			ret = adev;
			continue;
		}
		/*
		 * There is more than one matching device 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 it if so.  Second, do the same for the object that
		 * we've just found.
		 */
		if (!ret_score) {
			ret_score = find_child_checks(ret, check_children);
			if (ret_score == FIND_CHILD_MAX_SCORE)
				return ret;
		}
		score = find_child_checks(adev, check_children);
		if (score == FIND_CHILD_MAX_SCORE) {
			return adev;
		} else if (score > ret_score) {
			ret = adev;
			ret_score = score;
		}
	}
	return ret;
}
EXPORT_SYMBOL_GPL(acpi_find_child_device);

static void acpi_physnode_link_name(char *buf, unsigned int node_id)
{
	if (node_id > 0)
		snprintf(buf, PHYSICAL_NODE_NAME_SIZE,
			 PHYSICAL_NODE_STRING "%u", node_id);
	else
		strcpy(buf, PHYSICAL_NODE_STRING);
}

int acpi_bind_one(struct device *dev, struct acpi_device *acpi_dev)
{
	struct acpi_device_physical_node *physical_node, *pn;
	char physical_node_name[PHYSICAL_NODE_NAME_SIZE];
	struct list_head *physnode_list;
	unsigned int node_id;
	int retval = -EINVAL;
	enum dev_dma_attr attr;

	if (has_acpi_companion(dev)) {
		if (acpi_dev) {
			dev_warn(dev, "ACPI companion already set\n");
			return -EINVAL;
		} else {
			acpi_dev = ACPI_COMPANION(dev);
		}
	}
	if (!acpi_dev)
		return -EINVAL;

	get_device(&acpi_dev->dev);
	get_device(dev);
	physical_node = kzalloc(sizeof(*physical_node), GFP_KERNEL);
	if (!physical_node) {
		retval = -ENOMEM;
		goto err;
	}

	mutex_lock(&acpi_dev->physical_node_lock);

	/*
	 * Keep the list sorted by node_id so that the IDs of removed nodes can
	 * be recycled easily.
	 */
	physnode_list = &acpi_dev->physical_node_list;
	node_id = 0;
	list_for_each_entry(pn, &acpi_dev->physical_node_list, node) {
		/* Sanity check. */
		if (pn->dev == dev) {
			mutex_unlock(&acpi_dev->physical_node_lock);

			dev_warn(dev, "Already associated with ACPI node\n");
			kfree(physical_node);
			if (ACPI_COMPANION(dev) != acpi_dev)
				goto err;

			put_device(dev);
			put_device(&acpi_dev->dev);
			return 0;
		}
		if (pn->node_id == node_id) {
			physnode_list = &pn->node;
			node_id++;
		}
	}

	physical_node->node_id = node_id;
	physical_node->dev = dev;
	list_add(&physical_node->node, physnode_list);
	acpi_dev->physical_node_count++;

	if (!has_acpi_companion(dev))
		ACPI_COMPANION_SET(dev, acpi_dev);

	attr = acpi_get_dma_attr(acpi_dev);
	if (attr != DEV_DMA_NOT_SUPPORTED)
		acpi_dma_configure(dev, attr);

	acpi_physnode_link_name(physical_node_name, node_id);
	retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
				   physical_node_name);
	if (retval)
		dev_err(&acpi_dev->dev, "Failed to create link %s (%d)\n",
			physical_node_name, retval);

	retval = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
				   "firmware_node");
	if (retval)
		dev_err(dev, "Failed to create link firmware_node (%d)\n",
			retval);

	mutex_unlock(&acpi_dev->physical_node_lock);

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

	return 0;

 err:
	ACPI_COMPANION_SET(dev, NULL);
	put_device(dev);
	put_device(&acpi_dev->dev);
	return retval;
}
EXPORT_SYMBOL_GPL(acpi_bind_one);

int acpi_unbind_one(struct device *dev)
{
	struct acpi_device *acpi_dev = ACPI_COMPANION(dev);
	struct acpi_device_physical_node *entry;

	if (!acpi_dev)
		return 0;

	mutex_lock(&acpi_dev->physical_node_lock);

	list_for_each_entry(entry, &acpi_dev->physical_node_list, node)
		if (entry->dev == dev) {
			char physnode_name[PHYSICAL_NODE_NAME_SIZE];

			list_del(&entry->node);
			acpi_dev->physical_node_count--;

			acpi_physnode_link_name(physnode_name, entry->node_id);
			sysfs_remove_link(&acpi_dev->dev.kobj, physnode_name);
			sysfs_remove_link(&dev->kobj, "firmware_node");
			ACPI_COMPANION_SET(dev, NULL);
			/* Drop references taken by acpi_bind_one(). */
			put_device(dev);
			put_device(&acpi_dev->dev);
			kfree(entry);
			break;
		}

	mutex_unlock(&acpi_dev->physical_node_lock);
	return 0;
}
EXPORT_SYMBOL_GPL(acpi_unbind_one);

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

	ret = acpi_bind_one(dev, NULL);
	if (ret && type) {
		struct acpi_device *adev;

		adev = type->find_companion(dev);
		if (!adev) {
			DBG("Unable to get handle for %s\n", dev_name(dev));
			ret = -ENODEV;
			goto out;
		}
		ret = acpi_bind_one(dev, adev);
		if (ret)
			goto out;
	}
	adev = ACPI_COMPANION(dev);
	if (!adev)
		goto out;

	if (type && type->setup)
		type->setup(dev);
	else if (adev->handler && adev->handler->bind)
		adev->handler->bind(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_device *adev = ACPI_COMPANION(dev);
	struct acpi_bus_type *type;

	if (!adev)
		return 0;

	type = acpi_get_bus_type(dev);
	if (type && type->cleanup)
		type->cleanup(dev);
	else if (adev->handler && adev->handler->unbind)
		adev->handler->unbind(dev);

	acpi_unbind_one(dev);
	return 0;
}

void __init init_acpi_device_notify(void)
{
	if (platform_notify || platform_notify_remove) {
		printk(KERN_ERR PREFIX "Can't use platform_notify\n");
		return;
	}
	platform_notify = acpi_platform_notify;
	platform_notify_remove = acpi_platform_notify_remove;
}
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>
4e10d12a DSL	15	#include <linux/acpi.h>
d0562674	16	#include <linux/dma-mapping.h>
4e10d12a	17
a192a958 LB	18	#include "internal.h"
a192a958 LB	19
4e10d12a DSL	20	#define ACPI_GLUE_DEBUG 0
4e10d12a DSL	21	#if ACPI_GLUE_DEBUG
23415eb5 JP	22	#define DBG(fmt, ...) \
23415eb5 JP	23	printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__)
4e10d12a	24	#else
23415eb5 JP	25	#define DBG(fmt, ...) \
	26	do { \
	27	if (0) \
	28	printk(KERN_DEBUG PREFIX fmt, ##__VA_ARGS__); \
	29	} while (0)
4e10d12a DSL	30	#endif
	31	static LIST_HEAD(bus_type_list);
	32	static DECLARE_RWSEM(bus_type_sem);
	33
1033f904	34	#define PHYSICAL_NODE_STRING "physical_node"
007ccfcf	35	#define PHYSICAL_NODE_NAME_SIZE (sizeof(PHYSICAL_NODE_STRING) + 10)
1033f904	36
4e10d12a DSL	37	int register_acpi_bus_type(struct acpi_bus_type *type)
	38	{
	39	if (acpi_disabled)
	40	return -ENODEV;
e3f02c52	41	if (type && type->match && type->find_companion) {
4e10d12a DSL	42	down_write(&bus_type_sem);
	43	list_add_tail(&type->list, &bus_type_list);
	44	up_write(&bus_type_sem);
53540098	45	printk(KERN_INFO PREFIX "bus type %s registered\n", type->name);
4e10d12a DSL	46	return 0;
	47	}
	48	return -ENODEV;
	49	}
91e4d5a1	50	EXPORT_SYMBOL_GPL(register_acpi_bus_type);
4e10d12a	51
4e10d12a DSL	52	int unregister_acpi_bus_type(struct acpi_bus_type *type)
	53	{
	54	if (acpi_disabled)
	55	return 0;
	56	if (type) {
	57	down_write(&bus_type_sem);
	58	list_del_init(&type->list);
	59	up_write(&bus_type_sem);
53540098 RW	60	printk(KERN_INFO PREFIX "bus type %s unregistered\n",
53540098 RW	61	type->name);
4e10d12a DSL	62	return 0;
	63	}
	64	return -ENODEV;
	65	}
91e4d5a1	66	EXPORT_SYMBOL_GPL(unregister_acpi_bus_type);
4e10d12a	67
53540098	68	static struct acpi_bus_type acpi_get_bus_type(struct device dev)
4e10d12a DSL	69	{
	70	struct acpi_bus_type tmp, ret = NULL;
	71
	72	down_read(&bus_type_sem);
	73	list_for_each_entry(tmp, &bus_type_list, list) {
53540098	74	if (tmp->match(dev)) {
4e10d12a DSL	75	ret = tmp;
	76	break;
	77	}
	78	}
	79	up_read(&bus_type_sem);
	80	return ret;
	81	}
	82
11b88ee2 RW	83	#define FIND_CHILD_MIN_SCORE 1
	84	#define FIND_CHILD_MAX_SCORE 2
	85
d9fef0c4	86	static int find_child_checks(struct acpi_device *adev, bool check_children)
60f75b8e	87	{
11b88ee2	88	bool sta_present = true;
60f75b8e RW	89	unsigned long long sta;
	90	acpi_status status;
	91
d9fef0c4	92	status = acpi_evaluate_integer(adev->handle, "_STA", NULL, &sta);
11b88ee2 RW	93	if (status == AE_NOT_FOUND)
	94	sta_present = false;
	95	else if (ACPI_FAILURE(status) \|\| !(sta & ACPI_STA_DEVICE_ENABLED))
	96	return -ENODEV;
60f75b8e	97
d9fef0c4 RW	98	if (check_children && list_empty(&adev->children))
d9fef0c4 RW	99	return -ENODEV;
60f75b8e	100
c2a6bbaf RW	101	/*
	102	* If the device has a _HID (or _CID) returning a valid ACPI/PNP
	103	* device ID, it is better to make it look less attractive here, so that
	104	* the other device with the same _ADR value (that may not have a valid
	105	* device ID) can be matched going forward. [This means a second spec
	106	* violation in a row, so whatever we do here is best effort anyway.]
	107	*/
	108	return sta_present && list_empty(&adev->pnp.ids) ?
	109	FIND_CHILD_MAX_SCORE : FIND_CHILD_MIN_SCORE;
60f75b8e RW	110	}
60f75b8e RW	111
d9fef0c4 RW	112	struct acpi_device acpi_find_child_device(struct acpi_device parent,
d9fef0c4 RW	113	u64 address, bool check_children)
60f75b8e	114	{
d9fef0c4 RW	115	struct acpi_device adev, ret = NULL;
	116	int ret_score = 0;
	117
5ce79d20 RW	118	if (!parent)
	119	return NULL;
	120
d9fef0c4 RW	121	list_for_each_entry(adev, &parent->children, node) {
	122	unsigned long long addr;
	123	acpi_status status;
	124	int score;
	125
	126	status = acpi_evaluate_integer(adev->handle, METHOD_NAME__ADR,
	127	NULL, &addr);
	128	if (ACPI_FAILURE(status) \|\| addr != address)
	129	continue;
	130
	131	if (!ret) {
	132	/* This is the first matching object. Save it. */
	133	ret = adev;
	134	continue;
	135	}
	136	/*
	137	* There is more than one matching device object with the same
	138	* _ADR value. That really is unexpected, so we are kind of
	139	* beyond the scope of the spec here. We have to choose which
	140	* one to return, though.
	141	*
	142	* First, check if the previously found object is good enough
	143	* and return it if so. Second, do the same for the object that
	144	* we've just found.
	145	*/
	146	if (!ret_score) {
	147	ret_score = find_child_checks(ret, check_children);
	148	if (ret_score == FIND_CHILD_MAX_SCORE)
	149	return ret;
	150	}
	151	score = find_child_checks(adev, check_children);
	152	if (score == FIND_CHILD_MAX_SCORE) {
	153	return adev;
	154	} else if (score > ret_score) {
	155	ret = adev;
	156	ret_score = score;
	157	}
4e10d12a	158	}
d9fef0c4	159	return ret;
4e10d12a	160	}
9c5ad36d	161	EXPORT_SYMBOL_GPL(acpi_find_child_device);
4e10d12a	162
bdbdbf91 RW	163	static void acpi_physnode_link_name(char *buf, unsigned int node_id)
	164	{
	165	if (node_id > 0)
	166	snprintf(buf, PHYSICAL_NODE_NAME_SIZE,
	167	PHYSICAL_NODE_STRING "%u", node_id);
	168	else
	169	strcpy(buf, PHYSICAL_NODE_STRING);
	170	}
	171
24dee1fc	172	int acpi_bind_one(struct device dev, struct acpi_device acpi_dev)
4e10d12a	173	{
f3fd0c8a	174	struct acpi_device_physical_node physical_node, pn;
007ccfcf RW	175	char physical_node_name[PHYSICAL_NODE_NAME_SIZE];
	176	struct list_head *physnode_list;
	177	unsigned int node_id;
1033f904	178	int retval = -EINVAL;
1831eff8	179	enum dev_dma_attr attr;
4e10d12a	180
ca5b74d2	181	if (has_acpi_companion(dev)) {
24dee1fc	182	if (acpi_dev) {
7b199811	183	dev_warn(dev, "ACPI companion already set\n");
f3fd0c8a RW	184	return -EINVAL;
f3fd0c8a RW	185	} else {
7b199811	186	acpi_dev = ACPI_COMPANION(dev);
f3fd0c8a	187	}
4e10d12a	188	}
7b199811	189	if (!acpi_dev)
f3fd0c8a	190	return -EINVAL;
1033f904	191
a104b4d4	192	get_device(&acpi_dev->dev);
4e10d12a	193	get_device(dev);
f3fd0c8a	194	physical_node = kzalloc(sizeof(*physical_node), GFP_KERNEL);
1033f904 LT	195	if (!physical_node) {
	196	retval = -ENOMEM;
	197	goto err;
4e10d12a	198	}
4e10d12a	199
1033f904	200	mutex_lock(&acpi_dev->physical_node_lock);
f3fd0c8a	201
007ccfcf RW	202	/*
	203	* Keep the list sorted by node_id so that the IDs of removed nodes can
	204	* be recycled easily.
	205	*/
	206	physnode_list = &acpi_dev->physical_node_list;
	207	node_id = 0;
	208	list_for_each_entry(pn, &acpi_dev->physical_node_list, node) {
	209	/* Sanity check. */
f3fd0c8a	210	if (pn->dev == dev) {
3342c753 RW	211	mutex_unlock(&acpi_dev->physical_node_lock);
3342c753 RW	212
f3fd0c8a	213	dev_warn(dev, "Already associated with ACPI node\n");
3342c753	214	kfree(physical_node);
7b199811	215	if (ACPI_COMPANION(dev) != acpi_dev)
3342c753	216	goto err;
3fe444ad	217
3342c753	218	put_device(dev);
a104b4d4	219	put_device(&acpi_dev->dev);
3342c753	220	return 0;
f3fd0c8a	221	}
007ccfcf RW	222	if (pn->node_id == node_id) {
	223	physnode_list = &pn->node;
	224	node_id++;
	225	}
1071695f DB	226	}
1071695f DB	227
007ccfcf	228	physical_node->node_id = node_id;
1033f904	229	physical_node->dev = dev;
007ccfcf	230	list_add(&physical_node->node, physnode_list);
1033f904	231	acpi_dev->physical_node_count++;
f3fd0c8a	232
ca5b74d2	233	if (!has_acpi_companion(dev))
7b199811	234	ACPI_COMPANION_SET(dev, acpi_dev);
1033f904	235
1831eff8 SS	236	attr = acpi_get_dma_attr(acpi_dev);
1831eff8 SS	237	if (attr != DEV_DMA_NOT_SUPPORTED)
d760a1ba	238	acpi_dma_configure(dev, attr);
d0562674	239
bdbdbf91	240	acpi_physnode_link_name(physical_node_name, node_id);
1033f904	241	retval = sysfs_create_link(&acpi_dev->dev.kobj, &dev->kobj,
f501b6ec	242	physical_node_name);
464c1147 RW	243	if (retval)
	244	dev_err(&acpi_dev->dev, "Failed to create link %s (%d)\n",
	245	physical_node_name, retval);
	246
1033f904	247	retval = sysfs_create_link(&dev->kobj, &acpi_dev->dev.kobj,
f501b6ec	248	"firmware_node");
464c1147 RW	249	if (retval)
	250	dev_err(dev, "Failed to create link firmware_node (%d)\n",
	251	retval);
1033f904	252
40055206 RW	253	mutex_unlock(&acpi_dev->physical_node_lock);
40055206 RW	254
1033f904 LT	255	if (acpi_dev->wakeup.flags.valid)
	256	device_set_wakeup_capable(dev, true);
	257
4e10d12a	258	return 0;
1033f904 LT	259
1033f904 LT	260	err:
7b199811	261	ACPI_COMPANION_SET(dev, NULL);
1033f904	262	put_device(dev);
a104b4d4	263	put_device(&acpi_dev->dev);
1033f904	264	return retval;
4e10d12a	265	}
ac212b69	266	EXPORT_SYMBOL_GPL(acpi_bind_one);
4e10d12a	267
ac212b69	268	int acpi_unbind_one(struct device *dev)
4e10d12a	269	{
7b199811	270	struct acpi_device *acpi_dev = ACPI_COMPANION(dev);
1033f904	271	struct acpi_device_physical_node *entry;
1033f904	272
7b199811	273	if (!acpi_dev)
4e10d12a	274	return 0;
1071695f	275
1033f904	276	mutex_lock(&acpi_dev->physical_node_lock);
3e332783 RW	277
	278	list_for_each_entry(entry, &acpi_dev->physical_node_list, node)
	279	if (entry->dev == dev) {
	280	char physnode_name[PHYSICAL_NODE_NAME_SIZE];
	281
	282	list_del(&entry->node);
	283	acpi_dev->physical_node_count--;
	284
	285	acpi_physnode_link_name(physnode_name, entry->node_id);
	286	sysfs_remove_link(&acpi_dev->dev.kobj, physnode_name);
	287	sysfs_remove_link(&dev->kobj, "firmware_node");
7b199811	288	ACPI_COMPANION_SET(dev, NULL);
a104b4d4	289	/* Drop references taken by acpi_bind_one(). */
3e332783	290	put_device(dev);
a104b4d4	291	put_device(&acpi_dev->dev);
3e332783 RW	292	kfree(entry);
	293	break;
	294	}
	295
1033f904	296	mutex_unlock(&acpi_dev->physical_node_lock);
4e10d12a DSL	297	return 0;
4e10d12a DSL	298	}
ac212b69	299	EXPORT_SYMBOL_GPL(acpi_unbind_one);
4e10d12a DSL	300
	301	static int acpi_platform_notify(struct device *dev)
	302	{
53540098	303	struct acpi_bus_type *type = acpi_get_bus_type(dev);
9cb32acf	304	struct acpi_device *adev;
11909ca1	305	int ret;
4e10d12a	306
f3fd0c8a	307	ret = acpi_bind_one(dev, NULL);
92414481	308	if (ret && type) {
e3f02c52 RW	309	struct acpi_device *adev;
	310
	311	adev = type->find_companion(dev);
	312	if (!adev) {
11909ca1	313	DBG("Unable to get handle for %s\n", dev_name(dev));
e3f02c52	314	ret = -ENODEV;
11909ca1 RW	315	goto out;
11909ca1 RW	316	}
24dee1fc	317	ret = acpi_bind_one(dev, adev);
11909ca1 RW	318	if (ret)
11909ca1 RW	319	goto out;
4e10d12a	320	}
9cb32acf RW	321	adev = ACPI_COMPANION(dev);
	322	if (!adev)
	323	goto out;
11909ca1 RW	324
	325	if (type && type->setup)
	326	type->setup(dev);
9cb32acf RW	327	else if (adev->handler && adev->handler->bind)
9cb32acf RW	328	adev->handler->bind(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	{
9cb32acf	347	struct acpi_device *adev = ACPI_COMPANION(dev);
11909ca1 RW	348	struct acpi_bus_type *type;
11909ca1 RW	349
9cb32acf RW	350	if (!adev)
	351	return 0;
	352
53540098	353	type = acpi_get_bus_type(dev);
11909ca1 RW	354	if (type && type->cleanup)
11909ca1 RW	355	type->cleanup(dev);
9cb32acf RW	356	else if (adev->handler && adev->handler->unbind)
9cb32acf RW	357	adev->handler->unbind(dev);
11909ca1	358
4e10d12a DSL	359	acpi_unbind_one(dev);
	360	return 0;
	361	}
	362
c33cab60	363	void __init init_acpi_device_notify(void)
4e10d12a	364	{
4e10d12a DSL	365	if (platform_notify \|\| platform_notify_remove) {
4e10d12a DSL	366	printk(KERN_ERR PREFIX "Can't use platform_notify\n");
c33cab60	367	return;
4e10d12a DSL	368	}
	369	platform_notify = acpi_platform_notify;
	370	platform_notify_remove = acpi_platform_notify_remove;
4e10d12a	371	}