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![Colin Ian King](/assets/img/avatar_default.png)
ACPICA commit 6648a6ac8410813bcfedb5c8345259dd155ea851 Fix spelling issues found using the codespell checker Link: https://github.com/acpica/acpica/commit/6648a6ac Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Erik Kaneda <erik.kaneda@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
209 lines
5.2 KiB
C
209 lines
5.2 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/*******************************************************************************
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*
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* Module Name: nsxfobj - Public interfaces to the ACPI subsystem
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* ACPI Object oriented interfaces
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*
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******************************************************************************/
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#define EXPORT_ACPI_INTERFACES
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME("nsxfobj")
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/*******************************************************************************
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*
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* FUNCTION: acpi_get_type
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*
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* PARAMETERS: handle - Handle of object whose type is desired
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* ret_type - Where the type will be placed
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*
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* RETURN: Status
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*
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* DESCRIPTION: This routine returns the type associated with a particular
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* handle
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*
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******************************************************************************/
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acpi_status acpi_get_type(acpi_handle handle, acpi_object_type *ret_type)
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{
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struct acpi_namespace_node *node;
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acpi_status status;
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/* Parameter Validation */
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if (!ret_type) {
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return (AE_BAD_PARAMETER);
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}
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/* Special case for the predefined Root Node (return type ANY) */
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if (handle == ACPI_ROOT_OBJECT) {
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*ret_type = ACPI_TYPE_ANY;
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return (AE_OK);
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}
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/* Convert and validate the handle */
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node = acpi_ns_validate_handle(handle);
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if (!node) {
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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return (AE_BAD_PARAMETER);
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}
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*ret_type = node->type;
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status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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return (status);
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}
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ACPI_EXPORT_SYMBOL(acpi_get_type)
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/*******************************************************************************
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*
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* FUNCTION: acpi_get_parent
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*
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* PARAMETERS: handle - Handle of object whose parent is desired
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* ret_handle - Where the parent handle will be placed
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*
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* RETURN: Status
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*
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* DESCRIPTION: Returns a handle to the parent of the object represented by
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* Handle.
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*
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******************************************************************************/
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acpi_status acpi_get_parent(acpi_handle handle, acpi_handle *ret_handle)
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{
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struct acpi_namespace_node *node;
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struct acpi_namespace_node *parent_node;
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acpi_status status;
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if (!ret_handle) {
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return (AE_BAD_PARAMETER);
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}
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/* Special case for the predefined Root Node (no parent) */
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if (handle == ACPI_ROOT_OBJECT) {
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return (AE_NULL_ENTRY);
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}
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/* Convert and validate the handle */
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node = acpi_ns_validate_handle(handle);
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if (!node) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/* Get the parent entry */
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parent_node = node->parent;
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*ret_handle = ACPI_CAST_PTR(acpi_handle, parent_node);
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/* Return exception if parent is null */
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if (!parent_node) {
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status = AE_NULL_ENTRY;
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}
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unlock_and_exit:
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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return (status);
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}
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ACPI_EXPORT_SYMBOL(acpi_get_parent)
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/*******************************************************************************
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*
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* FUNCTION: acpi_get_next_object
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*
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* PARAMETERS: type - Type of object to be searched for
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* parent - Parent object whose children we are getting
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* last_child - Previous child that was found.
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* The NEXT child will be returned
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* ret_handle - Where handle to the next object is placed
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*
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* RETURN: Status
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*
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* DESCRIPTION: Return the next peer object within the namespace. If Handle is
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* valid, Scope is ignored. Otherwise, the first object within
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* Scope is returned.
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*
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******************************************************************************/
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acpi_status
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acpi_get_next_object(acpi_object_type type,
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acpi_handle parent,
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acpi_handle child, acpi_handle *ret_handle)
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{
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acpi_status status;
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struct acpi_namespace_node *node;
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struct acpi_namespace_node *parent_node = NULL;
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struct acpi_namespace_node *child_node = NULL;
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/* Parameter validation */
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if (type > ACPI_TYPE_EXTERNAL_MAX) {
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return (AE_BAD_PARAMETER);
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}
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/* If null handle, use the parent */
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if (!child) {
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/* Start search at the beginning of the specified scope */
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parent_node = acpi_ns_validate_handle(parent);
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if (!parent_node) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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} else {
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/* Non-null handle, ignore the parent */
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/* Convert and validate the handle */
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child_node = acpi_ns_validate_handle(child);
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if (!child_node) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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}
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/* Internal function does the real work */
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node = acpi_ns_get_next_node_typed(type, parent_node, child_node);
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if (!node) {
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status = AE_NOT_FOUND;
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goto unlock_and_exit;
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}
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if (ret_handle) {
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*ret_handle = ACPI_CAST_PTR(acpi_handle, node);
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}
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unlock_and_exit:
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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return (status);
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}
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ACPI_EXPORT_SYMBOL(acpi_get_next_object)
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