Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 764 insertions, 0 deletions

diff --git a/drivers/acpi/namespace/nsxfeval.c b/drivers/acpi/namespace/nsxfeval.c
new file mode 100644
index 000000000000..1dc995586cbe
--- /dev/null
+++ b/drivers/acpi/namespace/nsxfeval.c
@@ -0,0 +1,764 @@
+/*******************************************************************************
+ *
+ * Module Name: nsxfeval - Public interfaces to the ACPI subsystem
+ *                         ACPI Object evaluation interfaces
+ *
+ ******************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2005, R. Byron Moore
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <linux/module.h>
+
+#include <acpi/acpi.h>
+#include <acpi/acnamesp.h>
+#include <acpi/acinterp.h>
+
+
+#define _COMPONENT          ACPI_NAMESPACE
+	 ACPI_MODULE_NAME    ("nsxfeval")
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_evaluate_object_typed
+ *
+ * PARAMETERS:  Handle              - Object handle (optional)
+ *              *Pathname           - Object pathname (optional)
+ *              **external_params   - List of parameters to pass to method,
+ *                                    terminated by NULL.  May be NULL
+ *                                    if no parameters are being passed.
+ *              *return_buffer      - Where to put method's return value (if
+ *                                    any).  If NULL, no value is returned.
+ *              return_type         - Expected type of return object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Find and evaluate the given object, passing the given
+ *              parameters if necessary.  One of "Handle" or "Pathname" must
+ *              be valid (non-null)
+ *
+ ******************************************************************************/
+#ifdef ACPI_FUTURE_USAGE
+acpi_status
+acpi_evaluate_object_typed (
+	acpi_handle                     handle,
+	acpi_string                     pathname,
+	struct acpi_object_list         *external_params,
+	struct acpi_buffer              *return_buffer,
+	acpi_object_type                return_type)
+{
+	acpi_status                     status;
+	u8                              must_free = FALSE;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_evaluate_object_typed");
+
+
+	/* Return buffer must be valid */
+
+	if (!return_buffer) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	if (return_buffer->length == ACPI_ALLOCATE_BUFFER) {
+		must_free = TRUE;
+	}
+
+	/* Evaluate the object */
+
+	status = acpi_evaluate_object (handle, pathname, external_params, return_buffer);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	/* Type ANY means "don't care" */
+
+	if (return_type == ACPI_TYPE_ANY) {
+		return_ACPI_STATUS (AE_OK);
+	}
+
+	if (return_buffer->length == 0) {
+		/* Error because caller specifically asked for a return value */
+
+		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+			"No return value\n"));
+
+		return_ACPI_STATUS (AE_NULL_OBJECT);
+	}
+
+	/* Examine the object type returned from evaluate_object */
+
+	if (((union acpi_object *) return_buffer->pointer)->type == return_type) {
+		return_ACPI_STATUS (AE_OK);
+	}
+
+	/* Return object type does not match requested type */
+
+	ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+		"Incorrect return type [%s] requested [%s]\n",
+		acpi_ut_get_type_name (((union acpi_object *) return_buffer->pointer)->type),
+		acpi_ut_get_type_name (return_type)));
+
+	if (must_free) {
+		/* Caller used ACPI_ALLOCATE_BUFFER, free the return buffer */
+
+		acpi_os_free (return_buffer->pointer);
+		return_buffer->pointer = NULL;
+	}
+
+	return_buffer->length = 0;
+	return_ACPI_STATUS (AE_TYPE);
+}
+#endif  /*  ACPI_FUTURE_USAGE  */
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_evaluate_object
+ *
+ * PARAMETERS:  Handle              - Object handle (optional)
+ *              Pathname            - Object pathname (optional)
+ *              external_params     - List of parameters to pass to method,
+ *                                    terminated by NULL.  May be NULL
+ *                                    if no parameters are being passed.
+ *              return_buffer       - Where to put method's return value (if
+ *                                    any).  If NULL, no value is returned.
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Find and evaluate the given object, passing the given
+ *              parameters if necessary.  One of "Handle" or "Pathname" must
+ *              be valid (non-null)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_evaluate_object (
+	acpi_handle                     handle,
+	acpi_string                     pathname,
+	struct acpi_object_list         *external_params,
+	struct acpi_buffer              *return_buffer)
+{
+	acpi_status                     status;
+	acpi_status                     status2;
+	struct acpi_parameter_info      info;
+	acpi_size                       buffer_space_needed;
+	u32                             i;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_evaluate_object");
+
+
+	info.node = handle;
+	info.parameters = NULL;
+	info.return_object = NULL;
+	info.parameter_type = ACPI_PARAM_ARGS;
+
+	/*
+	 * If there are parameters to be passed to the object
+	 * (which must be a control method), the external objects
+	 * must be converted to internal objects
+	 */
+	if (external_params && external_params->count) {
+		/*
+		 * Allocate a new parameter block for the internal objects
+		 * Add 1 to count to allow for null terminated internal list
+		 */
+		info.parameters = ACPI_MEM_CALLOCATE (
+				 ((acpi_size) external_params->count + 1) *
+				 sizeof (void *));
+		if (!info.parameters) {
+			return_ACPI_STATUS (AE_NO_MEMORY);
+		}
+
+		/*
+		 * Convert each external object in the list to an
+		 * internal object
+		 */
+		for (i = 0; i < external_params->count; i++) {
+			status = acpi_ut_copy_eobject_to_iobject (&external_params->pointer[i],
+					  &info.parameters[i]);
+			if (ACPI_FAILURE (status)) {
+				acpi_ut_delete_internal_object_list (info.parameters);
+				return_ACPI_STATUS (status);
+			}
+		}
+		info.parameters[external_params->count] = NULL;
+	}
+
+
+	/*
+	 * Three major cases:
+	 * 1) Fully qualified pathname
+	 * 2) No handle, not fully qualified pathname (error)
+	 * 3) Valid handle
+	 */
+	if ((pathname) &&
+		(acpi_ns_valid_root_prefix (pathname[0]))) {
+		/*
+		 *  The path is fully qualified, just evaluate by name
+		 */
+		status = acpi_ns_evaluate_by_name (pathname, &info);
+	}
+	else if (!handle) {
+		/*
+		 * A handle is optional iff a fully qualified pathname
+		 * is specified.  Since we've already handled fully
+		 * qualified names above, this is an error
+		 */
+		if (!pathname) {
+			ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+				"Both Handle and Pathname are NULL\n"));
+		}
+		else {
+			ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
+				"Handle is NULL and Pathname is relative\n"));
+		}
+
+		status = AE_BAD_PARAMETER;
+	}
+	else {
+		/*
+		 * We get here if we have a handle -- and if we have a
+		 * pathname it is relative.  The handle will be validated
+		 * in the lower procedures
+		 */
+		if (!pathname) {
+			/*
+			 * The null pathname case means the handle is for
+			 * the actual object to be evaluated
+			 */
+			status = acpi_ns_evaluate_by_handle (&info);
+		}
+		else {
+		   /*
+			* Both a Handle and a relative Pathname
+			*/
+			status = acpi_ns_evaluate_relative (pathname, &info);
+		}
+	}
+
+
+	/*
+	 * If we are expecting a return value, and all went well above,
+	 * copy the return value to an external object.
+	 */
+	if (return_buffer) {
+		if (!info.return_object) {
+			return_buffer->length = 0;
+		}
+		else {
+			if (ACPI_GET_DESCRIPTOR_TYPE (info.return_object) == ACPI_DESC_TYPE_NAMED) {
+				/*
+				 * If we received a NS Node as a return object, this means that
+				 * the object we are evaluating has nothing interesting to
+				 * return (such as a mutex, etc.)  We return an error because
+				 * these types are essentially unsupported by this interface.
+				 * We don't check up front because this makes it easier to add
+				 * support for various types at a later date if necessary.
+				 */
+				status = AE_TYPE;
+				info.return_object = NULL;  /* No need to delete a NS Node */
+				return_buffer->length = 0;
+			}
+
+			if (ACPI_SUCCESS (status)) {
+				/*
+				 * Find out how large a buffer is needed
+				 * to contain the returned object
+				 */
+				status = acpi_ut_get_object_size (info.return_object,
+						   &buffer_space_needed);
+				if (ACPI_SUCCESS (status)) {
+					/* Validate/Allocate/Clear caller buffer */
+
+					status = acpi_ut_initialize_buffer (return_buffer, buffer_space_needed);
+					if (ACPI_FAILURE (status)) {
+						/*
+						 * Caller's buffer is too small or a new one can't be allocated
+						 */
+						ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
+							"Needed buffer size %X, %s\n",
+							(u32) buffer_space_needed,
+							acpi_format_exception (status)));
+					}
+					else {
+						/*
+						 *  We have enough space for the object, build it
+						 */
+						status = acpi_ut_copy_iobject_to_eobject (info.return_object,
+								  return_buffer);
+					}
+				}
+			}
+		}
+	}
+
+	if (info.return_object) {
+		/*
+		 * Delete the internal return object.  NOTE: Interpreter
+		 * must be locked to avoid race condition.
+		 */
+		status2 = acpi_ex_enter_interpreter ();
+		if (ACPI_SUCCESS (status2)) {
+			/*
+			 * Delete the internal return object. (Or at least
+			 * decrement the reference count by one)
+			 */
+			acpi_ut_remove_reference (info.return_object);
+			acpi_ex_exit_interpreter ();
+		}
+	}
+
+	/*
+	 * Free the input parameter list (if we created one),
+	 */
+	if (info.parameters) {
+		/* Free the allocated parameter block */
+
+		acpi_ut_delete_internal_object_list (info.parameters);
+	}
+
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_evaluate_object);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_walk_namespace
+ *
+ * PARAMETERS:  Type                - acpi_object_type to search for
+ *              start_object        - Handle in namespace where search begins
+ *              max_depth           - Depth to which search is to reach
+ *              user_function       - Called when an object of "Type" is found
+ *              Context             - Passed to user function
+ *              return_value        - Location where return value of
+ *                                    user_function is put if terminated early
+ *
+ * RETURNS      Return value from the user_function if terminated early.
+ *              Otherwise, returns NULL.
+ *
+ * DESCRIPTION: Performs a modified depth-first walk of the namespace tree,
+ *              starting (and ending) at the object specified by start_handle.
+ *              The user_function is called whenever an object that matches
+ *              the type parameter is found.  If the user function returns
+ *              a non-zero value, the search is terminated immediately and this
+ *              value is returned to the caller.
+ *
+ *              The point of this procedure is to provide a generic namespace
+ *              walk routine that can be called from multiple places to
+ *              provide multiple services;  the User Function can be tailored
+ *              to each task, whether it is a print function, a compare
+ *              function, etc.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_walk_namespace (
+	acpi_object_type                type,
+	acpi_handle                     start_object,
+	u32                             max_depth,
+	acpi_walk_callback              user_function,
+	void                            *context,
+	void                            **return_value)
+{
+	acpi_status                     status;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_walk_namespace");
+
+
+	/* Parameter validation */
+
+	if ((type > ACPI_TYPE_EXTERNAL_MAX) ||
+		(!max_depth)                    ||
+		(!user_function)) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 * Lock the namespace around the walk.
+	 * The namespace will be unlocked/locked around each call
+	 * to the user function - since this function
+	 * must be allowed to make Acpi calls itself.
+	 */
+	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	status = acpi_ns_walk_namespace (type, start_object, max_depth, ACPI_NS_WALK_UNLOCK,
+			  user_function, context, return_value);
+
+	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_walk_namespace);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_get_device_callback
+ *
+ * PARAMETERS:  Callback from acpi_get_device
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Takes callbacks from walk_namespace and filters out all non-
+ *              present devices, or if they specified a HID, it filters based
+ *              on that.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ns_get_device_callback (
+	acpi_handle                     obj_handle,
+	u32                             nesting_level,
+	void                            *context,
+	void                            **return_value)
+{
+	struct acpi_get_devices_info    *info = context;
+	acpi_status                     status;
+	struct acpi_namespace_node      *node;
+	u32                             flags;
+	struct acpi_device_id           hid;
+	struct acpi_compatible_id_list *cid;
+	acpi_native_uint                i;
+
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE (status)) {
+		return (status);
+	}
+
+	node = acpi_ns_map_handle_to_node (obj_handle);
+	status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE (status)) {
+		return (status);
+	}
+
+	if (!node) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	/* Run _STA to determine if device is present */
+
+	status = acpi_ut_execute_STA (node, &flags);
+	if (ACPI_FAILURE (status)) {
+		return (AE_CTRL_DEPTH);
+	}
+
+	if (!(flags & 0x01)) {
+		/* Don't return at the device or children of the device if not there */
+
+		return (AE_CTRL_DEPTH);
+	}
+
+	/* Filter based on device HID & CID */
+
+	if (info->hid != NULL) {
+		status = acpi_ut_execute_HID (node, &hid);
+		if (status == AE_NOT_FOUND) {
+			return (AE_OK);
+		}
+		else if (ACPI_FAILURE (status)) {
+			return (AE_CTRL_DEPTH);
+		}
+
+		if (ACPI_STRNCMP (hid.value, info->hid, sizeof (hid.value)) != 0) {
+			/* Get the list of Compatible IDs */
+
+			status = acpi_ut_execute_CID (node, &cid);
+			if (status == AE_NOT_FOUND) {
+				return (AE_OK);
+			}
+			else if (ACPI_FAILURE (status)) {
+				return (AE_CTRL_DEPTH);
+			}
+
+			/* Walk the CID list */
+
+			for (i = 0; i < cid->count; i++) {
+				if (ACPI_STRNCMP (cid->id[i].value, info->hid,
+						 sizeof (struct acpi_compatible_id)) != 0) {
+					ACPI_MEM_FREE (cid);
+					return (AE_OK);
+				}
+			}
+			ACPI_MEM_FREE (cid);
+		}
+	}
+
+	status = info->user_function (obj_handle, nesting_level, info->context, return_value);
+	return (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_devices
+ *
+ * PARAMETERS:  HID                 - HID to search for. Can be NULL.
+ *              user_function       - Called when a matching object is found
+ *              Context             - Passed to user function
+ *              return_value        - Location where return value of
+ *                                    user_function is put if terminated early
+ *
+ * RETURNS      Return value from the user_function if terminated early.
+ *              Otherwise, returns NULL.
+ *
+ * DESCRIPTION: Performs a modified depth-first walk of the namespace tree,
+ *              starting (and ending) at the object specified by start_handle.
+ *              The user_function is called whenever an object of type
+ *              Device is found.  If the user function returns
+ *              a non-zero value, the search is terminated immediately and this
+ *              value is returned to the caller.
+ *
+ *              This is a wrapper for walk_namespace, but the callback performs
+ *              additional filtering. Please see acpi_get_device_callback.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_devices (
+	char                            *HID,
+	acpi_walk_callback              user_function,
+	void                            *context,
+	void                            **return_value)
+{
+	acpi_status                     status;
+	struct acpi_get_devices_info    info;
+
+
+	ACPI_FUNCTION_TRACE ("acpi_get_devices");
+
+
+	/* Parameter validation */
+
+	if (!user_function) {
+		return_ACPI_STATUS (AE_BAD_PARAMETER);
+	}
+
+	/*
+	 * We're going to call their callback from OUR callback, so we need
+	 * to know what it is, and their context parameter.
+	 */
+	info.context      = context;
+	info.user_function = user_function;
+	info.hid          = HID;
+
+	/*
+	 * Lock the namespace around the walk.
+	 * The namespace will be unlocked/locked around each call
+	 * to the user function - since this function
+	 * must be allowed to make Acpi calls itself.
+	 */
+	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE (status)) {
+		return_ACPI_STATUS (status);
+	}
+
+	status = acpi_ns_walk_namespace (ACPI_TYPE_DEVICE,
+			   ACPI_ROOT_OBJECT, ACPI_UINT32_MAX,
+			   ACPI_NS_WALK_UNLOCK,
+			   acpi_ns_get_device_callback, &info,
+			   return_value);
+
+	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+	return_ACPI_STATUS (status);
+}
+EXPORT_SYMBOL(acpi_get_devices);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_attach_data
+ *
+ * PARAMETERS:  obj_handle          - Namespace node
+ *              Handler             - Handler for this attachment
+ *              Data                - Pointer to data to be attached
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Attach arbitrary data and handler to a namespace node.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_attach_data (
+	acpi_handle                     obj_handle,
+	acpi_object_handler             handler,
+	void                            *data)
+{
+	struct acpi_namespace_node      *node;
+	acpi_status                     status;
+
+
+	/* Parameter validation */
+
+	if (!obj_handle ||
+		!handler    ||
+		!data) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE (status)) {
+		return (status);
+	}
+
+	/* Convert and validate the handle */
+
+	node = acpi_ns_map_handle_to_node (obj_handle);
+	if (!node) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	status = acpi_ns_attach_data (node, handler, data);
+
+unlock_and_exit:
+	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+	return (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_detach_data
+ *
+ * PARAMETERS:  obj_handle          - Namespace node handle
+ *              Handler             - Handler used in call to acpi_attach_data
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove data that was previously attached to a node.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_detach_data (
+	acpi_handle                     obj_handle,
+	acpi_object_handler             handler)
+{
+	struct acpi_namespace_node      *node;
+	acpi_status                     status;
+
+
+	/* Parameter validation */
+
+	if (!obj_handle ||
+		!handler) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE (status)) {
+		return (status);
+	}
+
+	/* Convert and validate the handle */
+
+	node = acpi_ns_map_handle_to_node (obj_handle);
+	if (!node) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	status = acpi_ns_detach_data (node, handler);
+
+unlock_and_exit:
+	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+	return (status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_data
+ *
+ * PARAMETERS:  obj_handle          - Namespace node
+ *              Handler             - Handler used in call to attach_data
+ *              Data                - Where the data is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Retrieve data that was previously attached to a namespace node.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_data (
+	acpi_handle                     obj_handle,
+	acpi_object_handler             handler,
+	void                            **data)
+{
+	struct acpi_namespace_node      *node;
+	acpi_status                     status;
+
+
+	/* Parameter validation */
+
+	if (!obj_handle ||
+		!handler    ||
+		!data) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE (status)) {
+		return (status);
+	}
+
+	/* Convert and validate the handle */
+
+	node = acpi_ns_map_handle_to_node (obj_handle);
+	if (!node) {
+		status = AE_BAD_PARAMETER;
+		goto unlock_and_exit;
+	}
+
+	status = acpi_ns_get_attached_data (node, handler, data);
+
+unlock_and_exit:
+	(void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
+	return (status);
+}
+
+