linux-imx

// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0

/*******************************************************************************

 *

 * Module Name: utxfmutex - external AML mutex access functions

 *

 ******************************************************************************/

​

#include <acpi/acpi.h>

#include "accommon.h"

#include "acnamesp.h"

​

#define _COMPONENT          ACPI_UTILITIES

ACPI_MODULE_NAME("utxfmutex")

​

/* Local prototypes */

static acpi_status

acpi_ut_get_mutex_object(acpi_handle handle,

             acpi_string pathname,

             union acpi_operand_object **ret_obj);

​

/*******************************************************************************

 *

 * FUNCTION:    acpi_ut_get_mutex_object

 *

 * PARAMETERS:  handle              - Mutex or prefix handle (optional)

 *              pathname            - Mutex pathname (optional)

 *              ret_obj             - Where the mutex object is returned

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Get an AML mutex object. The mutex node is pointed to by

 *              Handle:Pathname. Either Handle or Pathname can be NULL, but

 *              not both.

 *

 ******************************************************************************/

​

static acpi_status

acpi_ut_get_mutex_object(acpi_handle handle,

             acpi_string pathname,

             union acpi_operand_object **ret_obj)

{

    struct acpi_namespace_node *mutex_node;

    union acpi_operand_object *mutex_obj;

    acpi_status status;

​

    /* Parameter validation */

​

    if (!ret_obj || (!handle && !pathname)) {

        return (AE_BAD_PARAMETER);

    }

​

    /* Get a the namespace node for the mutex */

​

    mutex_node = handle;

    if (pathname != NULL) {

        status =

            acpi_get_handle(handle, pathname,

                    ACPI_CAST_PTR(acpi_handle, &mutex_node));

        if (ACPI_FAILURE(status)) {

            return (status);

        }

    }

​