--- /dev/null
+/*******************************************************************************
+ *
+ * Module Name: rsutils - Utilities for the resource manager
+ *
+ ******************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2015, Intel Corp.
+ * 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 "accommon.h"
+#include "acnamesp.h"
+#include "acresrc.h"
+
+#define _COMPONENT ACPI_RESOURCES
+ACPI_MODULE_NAME("rsutils")
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_decode_bitmask
+ *
+ * PARAMETERS: mask - Bitmask to decode
+ * list - Where the converted list is returned
+ *
+ * RETURN: Count of bits set (length of list)
+ *
+ * DESCRIPTION: Convert a bit mask into a list of values
+ *
+ ******************************************************************************/
+u8 acpi_rs_decode_bitmask(u16 mask, u8 * list)
+{
+ u8 i;
+ u8 bit_count;
+
+ ACPI_FUNCTION_ENTRY();
+
+ /* Decode the mask bits */
+
+ for (i = 0, bit_count = 0; mask; i++) {
+ if (mask & 0x0001) {
+ list[bit_count] = i;
+ bit_count++;
+ }
+
+ mask >>= 1;
+ }
+
+ return (bit_count);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_encode_bitmask
+ *
+ * PARAMETERS: list - List of values to encode
+ * count - Length of list
+ *
+ * RETURN: Encoded bitmask
+ *
+ * DESCRIPTION: Convert a list of values to an encoded bitmask
+ *
+ ******************************************************************************/
+
+u16 acpi_rs_encode_bitmask(u8 * list, u8 count)
+{
+ u32 i;
+ u16 mask;
+
+ ACPI_FUNCTION_ENTRY();
+
+ /* Encode the list into a single bitmask */
+
+ for (i = 0, mask = 0; i < count; i++) {
+ mask |= (0x1 << list[i]);
+ }
+
+ return (mask);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_move_data
+ *
+ * PARAMETERS: destination - Pointer to the destination descriptor
+ * source - Pointer to the source descriptor
+ * item_count - How many items to move
+ * move_type - Byte width
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Move multiple data items from one descriptor to another. Handles
+ * alignment issues and endian issues if necessary, as configured
+ * via the ACPI_MOVE_* macros. (This is why a memcpy is not used)
+ *
+ ******************************************************************************/
+
+void
+acpi_rs_move_data(void *destination, void *source, u16 item_count, u8 move_type)
+{
+ u32 i;
+
+ ACPI_FUNCTION_ENTRY();
+
+ /* One move per item */
+
+ for (i = 0; i < item_count; i++) {
+ switch (move_type) {
+ /*
+ * For the 8-bit case, we can perform the move all at once
+ * since there are no alignment or endian issues
+ */
+ case ACPI_RSC_MOVE8:
+ case ACPI_RSC_MOVE_GPIO_RES:
+ case ACPI_RSC_MOVE_SERIAL_VEN:
+ case ACPI_RSC_MOVE_SERIAL_RES:
+
+ ACPI_MEMCPY(destination, source, item_count);
+ return;
+
+ /*
+ * 16-, 32-, and 64-bit cases must use the move macros that perform
+ * endian conversion and/or accommodate hardware that cannot perform
+ * misaligned memory transfers
+ */
+ case ACPI_RSC_MOVE16:
+ case ACPI_RSC_MOVE_GPIO_PIN:
+
+ ACPI_MOVE_16_TO_16(&ACPI_CAST_PTR(u16, destination)[i],
+ &ACPI_CAST_PTR(u16, source)[i]);
+ break;
+
+ case ACPI_RSC_MOVE32:
+
+ ACPI_MOVE_32_TO_32(&ACPI_CAST_PTR(u32, destination)[i],
+ &ACPI_CAST_PTR(u32, source)[i]);
+ break;
+
+ case ACPI_RSC_MOVE64:
+
+ ACPI_MOVE_64_TO_64(&ACPI_CAST_PTR(u64, destination)[i],
+ &ACPI_CAST_PTR(u64, source)[i]);
+ break;
+
+ default:
+
+ return;
+ }
+ }
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_set_resource_length
+ *
+ * PARAMETERS: total_length - Length of the AML descriptor, including
+ * the header and length fields.
+ * aml - Pointer to the raw AML descriptor
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Set the resource_length field of an AML
+ * resource descriptor, both Large and Small descriptors are
+ * supported automatically. Note: Descriptor Type field must
+ * be valid.
+ *
+ ******************************************************************************/
+
+void
+acpi_rs_set_resource_length(acpi_rsdesc_size total_length,
+ union aml_resource *aml)
+{
+ acpi_rs_length resource_length;
+
+ ACPI_FUNCTION_ENTRY();
+
+ /* Length is the total descriptor length minus the header length */
+
+ resource_length = (acpi_rs_length)
+ (total_length - acpi_ut_get_resource_header_length(aml));
+
+ /* Length is stored differently for large and small descriptors */
+
+ if (aml->small_header.descriptor_type & ACPI_RESOURCE_NAME_LARGE) {
+
+ /* Large descriptor -- bytes 1-2 contain the 16-bit length */
+
+ ACPI_MOVE_16_TO_16(&aml->large_header.resource_length,
+ &resource_length);
+ } else {
+ /* Small descriptor -- bits 2:0 of byte 0 contain the length */
+
+ aml->small_header.descriptor_type = (u8)
+
+ /* Clear any existing length, preserving descriptor type bits */
+ ((aml->small_header.
+ descriptor_type & ~ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK)
+
+ | resource_length);
+ }
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_set_resource_header
+ *
+ * PARAMETERS: descriptor_type - Byte to be inserted as the type
+ * total_length - Length of the AML descriptor, including
+ * the header and length fields.
+ * aml - Pointer to the raw AML descriptor
+ *
+ * RETURN: None
+ *
+ * DESCRIPTION: Set the descriptor_type and resource_length fields of an AML
+ * resource descriptor, both Large and Small descriptors are
+ * supported automatically
+ *
+ ******************************************************************************/
+
+void
+acpi_rs_set_resource_header(u8 descriptor_type,
+ acpi_rsdesc_size total_length,
+ union aml_resource *aml)
+{
+ ACPI_FUNCTION_ENTRY();
+
+ /* Set the Resource Type */
+
+ aml->small_header.descriptor_type = descriptor_type;
+
+ /* Set the Resource Length */
+
+ acpi_rs_set_resource_length(total_length, aml);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_strcpy
+ *
+ * PARAMETERS: destination - Pointer to the destination string
+ * source - Pointer to the source string
+ *
+ * RETURN: String length, including NULL terminator
+ *
+ * DESCRIPTION: Local string copy that returns the string length, saving a
+ * strcpy followed by a strlen.
+ *
+ ******************************************************************************/
+
+static u16 acpi_rs_strcpy(char *destination, char *source)
+{
+ u16 i;
+
+ ACPI_FUNCTION_ENTRY();
+
+ for (i = 0; source[i]; i++) {
+ destination[i] = source[i];
+ }
+
+ destination[i] = 0;
+
+ /* Return string length including the NULL terminator */
+
+ return ((u16) (i + 1));
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_get_resource_source
+ *
+ * PARAMETERS: resource_length - Length field of the descriptor
+ * minimum_length - Minimum length of the descriptor (minus
+ * any optional fields)
+ * resource_source - Where the resource_source is returned
+ * aml - Pointer to the raw AML descriptor
+ * string_ptr - (optional) where to store the actual
+ * resource_source string
+ *
+ * RETURN: Length of the string plus NULL terminator, rounded up to native
+ * word boundary
+ *
+ * DESCRIPTION: Copy the optional resource_source data from a raw AML descriptor
+ * to an internal resource descriptor
+ *
+ ******************************************************************************/
+
+acpi_rs_length
+acpi_rs_get_resource_source(acpi_rs_length resource_length,
+ acpi_rs_length minimum_length,
+ struct acpi_resource_source * resource_source,
+ union aml_resource * aml, char *string_ptr)
+{
+ acpi_rsdesc_size total_length;
+ u8 *aml_resource_source;
+
+ ACPI_FUNCTION_ENTRY();
+
+ total_length =
+ resource_length + sizeof(struct aml_resource_large_header);
+ aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length);
+
+ /*
+ * resource_source is present if the length of the descriptor is longer than
+ * the minimum length.
+ *
+ * Note: Some resource descriptors will have an additional null, so
+ * we add 1 to the minimum length.
+ */
+ if (total_length > (acpi_rsdesc_size) (minimum_length + 1)) {
+
+ /* Get the resource_source_index */
+
+ resource_source->index = aml_resource_source[0];
+
+ resource_source->string_ptr = string_ptr;
+ if (!string_ptr) {
+ /*
+ * String destination pointer is not specified; Set the String
+ * pointer to the end of the current resource_source structure.
+ */
+ resource_source->string_ptr =
+ ACPI_ADD_PTR(char, resource_source,
+ sizeof(struct acpi_resource_source));
+ }
+
+ /*
+ * In order for the Resource length to be a multiple of the native
+ * word, calculate the length of the string (+1 for NULL terminator)
+ * and expand to the next word multiple.
+ *
+ * Zero the entire area of the buffer.
+ */
+ total_length =
+ (u32)
+ ACPI_STRLEN(ACPI_CAST_PTR(char, &aml_resource_source[1])) +
+ 1;
+ total_length = (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(total_length);
+
+ ACPI_MEMSET(resource_source->string_ptr, 0, total_length);
+
+ /* Copy the resource_source string to the destination */
+
+ resource_source->string_length =
+ acpi_rs_strcpy(resource_source->string_ptr,
+ ACPI_CAST_PTR(char,
+ &aml_resource_source[1]));
+
+ return ((acpi_rs_length) total_length);
+ }
+
+ /* resource_source is not present */
+
+ resource_source->index = 0;
+ resource_source->string_length = 0;
+ resource_source->string_ptr = NULL;
+ return (0);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_set_resource_source
+ *
+ * PARAMETERS: aml - Pointer to the raw AML descriptor
+ * minimum_length - Minimum length of the descriptor (minus
+ * any optional fields)
+ * resource_source - Internal resource_source
+
+ *
+ * RETURN: Total length of the AML descriptor
+ *
+ * DESCRIPTION: Convert an optional resource_source from internal format to a
+ * raw AML resource descriptor
+ *
+ ******************************************************************************/
+
+acpi_rsdesc_size
+acpi_rs_set_resource_source(union aml_resource * aml,
+ acpi_rs_length minimum_length,
+ struct acpi_resource_source * resource_source)
+{
+ u8 *aml_resource_source;
+ acpi_rsdesc_size descriptor_length;
+
+ ACPI_FUNCTION_ENTRY();
+
+ descriptor_length = minimum_length;
+
+ /* Non-zero string length indicates presence of a resource_source */
+
+ if (resource_source->string_length) {
+
+ /* Point to the end of the AML descriptor */
+
+ aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length);
+
+ /* Copy the resource_source_index */
+
+ aml_resource_source[0] = (u8) resource_source->index;
+
+ /* Copy the resource_source string */
+
+ ACPI_STRCPY(ACPI_CAST_PTR(char, &aml_resource_source[1]),
+ resource_source->string_ptr);
+
+ /*
+ * Add the length of the string (+ 1 for null terminator) to the
+ * final descriptor length
+ */
+ descriptor_length +=
+ ((acpi_rsdesc_size) resource_source->string_length + 1);
+ }
+
+ /* Return the new total length of the AML descriptor */
+
+ return (descriptor_length);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_get_prt_method_data
+ *
+ * PARAMETERS: node - Device node
+ * ret_buffer - Pointer to a buffer structure for the
+ * results
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: This function is called to get the _PRT value of an object
+ * contained in an object specified by the handle passed in
+ *
+ * If the function fails an appropriate status will be returned
+ * and the contents of the callers buffer is undefined.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_rs_get_prt_method_data(struct acpi_namespace_node * node,
+ struct acpi_buffer * ret_buffer)
+{
+ union acpi_operand_object *obj_desc;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(rs_get_prt_method_data);
+
+ /* Parameters guaranteed valid by caller */
+
+ /* Execute the method, no parameters */
+
+ status = acpi_ut_evaluate_object(node, METHOD_NAME__PRT,
+ ACPI_BTYPE_PACKAGE, &obj_desc);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /*
+ * Create a resource linked list from the byte stream buffer that comes
+ * back from the _CRS method execution.
+ */
+ status = acpi_rs_create_pci_routing_table(obj_desc, ret_buffer);
+
+ /* On exit, we must delete the object returned by evaluate_object */
+
+ acpi_ut_remove_reference(obj_desc);
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_get_crs_method_data
+ *
+ * PARAMETERS: node - Device node
+ * ret_buffer - Pointer to a buffer structure for the
+ * results
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: This function is called to get the _CRS value of an object
+ * contained in an object specified by the handle passed in
+ *
+ * If the function fails an appropriate status will be returned
+ * and the contents of the callers buffer is undefined.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_rs_get_crs_method_data(struct acpi_namespace_node *node,
+ struct acpi_buffer *ret_buffer)
+{
+ union acpi_operand_object *obj_desc;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(rs_get_crs_method_data);
+
+ /* Parameters guaranteed valid by caller */
+
+ /* Execute the method, no parameters */
+
+ status = acpi_ut_evaluate_object(node, METHOD_NAME__CRS,
+ ACPI_BTYPE_BUFFER, &obj_desc);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /*
+ * Make the call to create a resource linked list from the
+ * byte stream buffer that comes back from the _CRS method
+ * execution.
+ */
+ status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
+
+ /* On exit, we must delete the object returned by evaluateObject */
+
+ acpi_ut_remove_reference(obj_desc);
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_get_prs_method_data
+ *
+ * PARAMETERS: node - Device node
+ * ret_buffer - Pointer to a buffer structure for the
+ * results
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: This function is called to get the _PRS value of an object
+ * contained in an object specified by the handle passed in
+ *
+ * If the function fails an appropriate status will be returned
+ * and the contents of the callers buffer is undefined.
+ *
+ ******************************************************************************/
+
+#ifdef ACPI_FUTURE_USAGE
+acpi_status
+acpi_rs_get_prs_method_data(struct acpi_namespace_node *node,
+ struct acpi_buffer *ret_buffer)
+{
+ union acpi_operand_object *obj_desc;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(rs_get_prs_method_data);
+
+ /* Parameters guaranteed valid by caller */
+
+ /* Execute the method, no parameters */
+
+ status = acpi_ut_evaluate_object(node, METHOD_NAME__PRS,
+ ACPI_BTYPE_BUFFER, &obj_desc);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /*
+ * Make the call to create a resource linked list from the
+ * byte stream buffer that comes back from the _CRS method
+ * execution.
+ */
+ status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
+
+ /* On exit, we must delete the object returned by evaluateObject */
+
+ acpi_ut_remove_reference(obj_desc);
+ return_ACPI_STATUS(status);
+}
+#endif /* ACPI_FUTURE_USAGE */
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_get_aei_method_data
+ *
+ * PARAMETERS: node - Device node
+ * ret_buffer - Pointer to a buffer structure for the
+ * results
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: This function is called to get the _AEI value of an object
+ * contained in an object specified by the handle passed in
+ *
+ * If the function fails an appropriate status will be returned
+ * and the contents of the callers buffer is undefined.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_rs_get_aei_method_data(struct acpi_namespace_node *node,
+ struct acpi_buffer *ret_buffer)
+{
+ union acpi_operand_object *obj_desc;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(rs_get_aei_method_data);
+
+ /* Parameters guaranteed valid by caller */
+
+ /* Execute the method, no parameters */
+
+ status = acpi_ut_evaluate_object(node, METHOD_NAME__AEI,
+ ACPI_BTYPE_BUFFER, &obj_desc);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /*
+ * Make the call to create a resource linked list from the
+ * byte stream buffer that comes back from the _CRS method
+ * execution.
+ */
+ status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
+
+ /* On exit, we must delete the object returned by evaluateObject */
+
+ acpi_ut_remove_reference(obj_desc);
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_get_method_data
+ *
+ * PARAMETERS: handle - Handle to the containing object
+ * path - Path to method, relative to Handle
+ * ret_buffer - Pointer to a buffer structure for the
+ * results
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: This function is called to get the _CRS or _PRS value of an
+ * object contained in an object specified by the handle passed in
+ *
+ * If the function fails an appropriate status will be returned
+ * and the contents of the callers buffer is undefined.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_rs_get_method_data(acpi_handle handle,
+ char *path, struct acpi_buffer *ret_buffer)
+{
+ union acpi_operand_object *obj_desc;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(rs_get_method_data);
+
+ /* Parameters guaranteed valid by caller */
+
+ /* Execute the method, no parameters */
+
+ status =
+ acpi_ut_evaluate_object(ACPI_CAST_PTR
+ (struct acpi_namespace_node, handle), path,
+ ACPI_BTYPE_BUFFER, &obj_desc);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /*
+ * Make the call to create a resource linked list from the
+ * byte stream buffer that comes back from the method
+ * execution.
+ */
+ status = acpi_rs_create_resource_list(obj_desc, ret_buffer);
+
+ /* On exit, we must delete the object returned by evaluate_object */
+
+ acpi_ut_remove_reference(obj_desc);
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_set_srs_method_data
+ *
+ * PARAMETERS: node - Device node
+ * in_buffer - Pointer to a buffer structure of the
+ * parameter
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: This function is called to set the _SRS of an object contained
+ * in an object specified by the handle passed in
+ *
+ * If the function fails an appropriate status will be returned
+ * and the contents of the callers buffer is undefined.
+ *
+ * Note: Parameters guaranteed valid by caller
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_rs_set_srs_method_data(struct acpi_namespace_node *node,
+ struct acpi_buffer *in_buffer)
+{
+ struct acpi_evaluate_info *info;
+ union acpi_operand_object *args[2];
+ acpi_status status;
+ struct acpi_buffer buffer;
+
+ ACPI_FUNCTION_TRACE(rs_set_srs_method_data);
+
+ /* 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->prefix_node = node;
+ info->relative_pathname = METHOD_NAME__SRS;
+ info->parameters = args;
+ info->flags = ACPI_IGNORE_RETURN_VALUE;
+
+ /*
+ * The in_buffer parameter will point to a linked list of
+ * resource parameters. It needs to be formatted into a
+ * byte stream to be sent in as an input parameter to _SRS
+ *
+ * Convert the linked list into a byte stream
+ */
+ buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
+ status = acpi_rs_create_aml_resources(in_buffer, &buffer);
+ if (ACPI_FAILURE(status)) {
+ goto cleanup;
+ }
+
+ /* Create and initialize the method parameter object */
+
+ args[0] = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
+ if (!args[0]) {
+ /*
+ * Must free the buffer allocated above (otherwise it is freed
+ * later)
+ */
+ ACPI_FREE(buffer.pointer);
+ status = AE_NO_MEMORY;
+ goto cleanup;
+ }
+
+ args[0]->buffer.length = (u32) buffer.length;
+ args[0]->buffer.pointer = buffer.pointer;
+ args[0]->common.flags = AOPOBJ_DATA_VALID;
+ args[1] = NULL;
+
+ /* Execute the method, no return value is expected */
+
+ status = acpi_ns_evaluate(info);
+
+ /* Clean up and return the status from acpi_ns_evaluate */
+
+ acpi_ut_remove_reference(args[0]);
+
+cleanup:
+ ACPI_FREE(info);
+ return_ACPI_STATUS(status);
+}
Code Review / kvmfornfv.git / blobdiff