![Andrew Patterson](/assets/img/avatar_default.png)
The callback function acpi_ns_get_device_callback called from acpi_get_devices() will check CID's if the HID does not match. This code has a bug where it requires that all CIDs match the HID. Changed the code so that any CID match will do. Signed-off-by: Andrew Patterson <andrew.patterson@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
732 lines
21 KiB
C
732 lines
21 KiB
C
/*******************************************************************************
|
|
*
|
|
* Module Name: nsxfeval - Public interfaces to the ACPI subsystem
|
|
* ACPI Object evaluation interfaces
|
|
*
|
|
******************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2007, 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 <acpi/acpi.h>
|
|
#include <acpi/acnamesp.h>
|
|
#include <acpi/acinterp.h>
|
|
|
|
#define _COMPONENT ACPI_NAMESPACE
|
|
ACPI_MODULE_NAME("nsxfeval")
|
|
#ifdef ACPI_FUTURE_USAGE
|
|
/*******************************************************************************
|
|
*
|
|
* 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)
|
|
*
|
|
******************************************************************************/
|
|
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_ERROR((AE_INFO, "No return value"));
|
|
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_ERROR((AE_INFO,
|
|
"Incorrect return type [%s] requested [%s]",
|
|
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_FREE(return_buffer->pointer);
|
|
return_buffer->pointer = NULL;
|
|
}
|
|
|
|
return_buffer->length = 0;
|
|
return_ACPI_STATUS(AE_TYPE);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_evaluate_object_typed)
|
|
#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;
|
|
struct acpi_evaluate_info *info;
|
|
acpi_size buffer_space_needed;
|
|
u32 i;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_evaluate_object);
|
|
|
|
/* Allocate and initialize the evaluation information block */
|
|
|
|
info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
|
|
if (!info) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
info->pathname = pathname;
|
|
info->parameter_type = ACPI_PARAM_ARGS;
|
|
|
|
/* Convert and validate the device handle */
|
|
|
|
info->prefix_node = acpi_ns_map_handle_to_node(handle);
|
|
if (!info->prefix_node) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto cleanup;
|
|
}
|
|
|
|
/*
|
|
* If there are parameters to be passed to a control method, the external
|
|
* objects must all 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_ALLOCATE_ZEROED(((acpi_size)
|
|
external_params->
|
|
count +
|
|
1) * sizeof(void *));
|
|
if (!info->parameters) {
|
|
status = AE_NO_MEMORY;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* 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)) {
|
|
goto cleanup;
|
|
}
|
|
}
|
|
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 */
|
|
|
|
info->prefix_node = NULL;
|
|
status = acpi_ns_evaluate(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_INFO,
|
|
"Both Handle and Pathname are NULL"));
|
|
} else {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
"Null Handle with relative pathname [%s]",
|
|
pathname));
|
|
}
|
|
|
|
status = AE_BAD_PARAMETER;
|
|
} else {
|
|
/* We have a namespace a node and a possible relative path */
|
|
|
|
status = acpi_ns_evaluate(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)) {
|
|
|
|
/* Get the size of 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.
|
|
*/
|
|
acpi_ex_enter_interpreter();
|
|
|
|
/* Remove one reference on the return object (should delete it) */
|
|
|
|
acpi_ut_remove_reference(info->return_object);
|
|
acpi_ex_exit_interpreter();
|
|
}
|
|
|
|
cleanup:
|
|
|
|
/* 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);
|
|
}
|
|
|
|
ACPI_FREE(info);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_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_LOCAL_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);
|
|
}
|
|
|
|
ACPI_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 acpica_device_id hid;
|
|
struct acpi_compatible_id_list *cid;
|
|
acpi_native_uint i;
|
|
int found;
|
|
|
|
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 & ACPI_STA_DEVICE_PRESENT)) {
|
|
|
|
/* Don't examine children of the device if not present */
|
|
|
|
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 */
|
|
|
|
found = 0;
|
|
for (i = 0; i < cid->count; i++) {
|
|
if (ACPI_STRNCMP(cid->id[i].value, info->hid,
|
|
sizeof(struct
|
|
acpi_compatible_id)) ==
|
|
0) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
ACPI_FREE(cid);
|
|
if (!found)
|
|
return (AE_OK);
|
|
}
|
|
}
|
|
|
|
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(const 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.hid = HID;
|
|
info.context = context;
|
|
info.user_function = user_function;
|
|
|
|
/*
|
|
* 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);
|
|
}
|
|
|
|
ACPI_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);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_attach_data)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_detach_data)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_get_data)
|