--- /dev/null
+/******************************************************************************
+ *
+ * Module Name: dswexec - Dispatcher method execution callbacks;
+ * dispatch to interpreter.
+ *
+ *****************************************************************************/
+
+/*
+ * 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 "acparser.h"
+#include "amlcode.h"
+#include "acdispat.h"
+#include "acinterp.h"
+#include "acnamesp.h"
+#include "acdebug.h"
+
+#define _COMPONENT ACPI_DISPATCHER
+ACPI_MODULE_NAME("dswexec")
+
+/*
+ * Dispatch table for opcode classes
+ */
+static acpi_execute_op acpi_gbl_op_type_dispatch[] = {
+ acpi_ex_opcode_0A_0T_1R,
+ acpi_ex_opcode_1A_0T_0R,
+ acpi_ex_opcode_1A_0T_1R,
+ acpi_ex_opcode_1A_1T_0R,
+ acpi_ex_opcode_1A_1T_1R,
+ acpi_ex_opcode_2A_0T_0R,
+ acpi_ex_opcode_2A_0T_1R,
+ acpi_ex_opcode_2A_1T_1R,
+ acpi_ex_opcode_2A_2T_1R,
+ acpi_ex_opcode_3A_0T_0R,
+ acpi_ex_opcode_3A_1T_1R,
+ acpi_ex_opcode_6A_0T_1R
+};
+
+/*****************************************************************************
+ *
+ * FUNCTION: acpi_ds_get_predicate_value
+ *
+ * PARAMETERS: walk_state - Current state of the parse tree walk
+ * result_obj - if non-zero, pop result from result stack
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Get the result of a predicate evaluation
+ *
+ ****************************************************************************/
+
+acpi_status
+acpi_ds_get_predicate_value(struct acpi_walk_state *walk_state,
+ union acpi_operand_object *result_obj)
+{
+ acpi_status status = AE_OK;
+ union acpi_operand_object *obj_desc;
+ union acpi_operand_object *local_obj_desc = NULL;
+
+ ACPI_FUNCTION_TRACE_PTR(ds_get_predicate_value, walk_state);
+
+ walk_state->control_state->common.state = 0;
+
+ if (result_obj) {
+ status = acpi_ds_result_pop(&obj_desc, walk_state);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status,
+ "Could not get result from predicate evaluation"));
+
+ return_ACPI_STATUS(status);
+ }
+ } else {
+ status = acpi_ds_create_operand(walk_state, walk_state->op, 0);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ status =
+ acpi_ex_resolve_to_value(&walk_state->operands[0],
+ walk_state);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ obj_desc = walk_state->operands[0];
+ }
+
+ if (!obj_desc) {
+ ACPI_ERROR((AE_INFO,
+ "No predicate ObjDesc=%p State=%p",
+ obj_desc, walk_state));
+
+ return_ACPI_STATUS(AE_AML_NO_OPERAND);
+ }
+
+ /*
+ * Result of predicate evaluation must be an Integer
+ * object. Implicitly convert the argument if necessary.
+ */
+ status = acpi_ex_convert_to_integer(obj_desc, &local_obj_desc, 16);
+ if (ACPI_FAILURE(status)) {
+ goto cleanup;
+ }
+
+ if (local_obj_desc->common.type != ACPI_TYPE_INTEGER) {
+ ACPI_ERROR((AE_INFO,
+ "Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X",
+ obj_desc, walk_state, obj_desc->common.type));
+
+ status = AE_AML_OPERAND_TYPE;
+ goto cleanup;
+ }
+
+ /* Truncate the predicate to 32-bits if necessary */
+
+ (void)acpi_ex_truncate_for32bit_table(local_obj_desc);
+
+ /*
+ * Save the result of the predicate evaluation on
+ * the control stack
+ */
+ if (local_obj_desc->integer.value) {
+ walk_state->control_state->common.value = TRUE;
+ } else {
+ /*
+ * Predicate is FALSE, we will just toss the
+ * rest of the package
+ */
+ walk_state->control_state->common.value = FALSE;
+ status = AE_CTRL_FALSE;
+ }
+
+ /* Predicate can be used for an implicit return value */
+
+ (void)acpi_ds_do_implicit_return(local_obj_desc, walk_state, TRUE);
+
+cleanup:
+
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Completed a predicate eval=%X Op=%p\n",
+ walk_state->control_state->common.value,
+ walk_state->op));
+
+ /* Break to debugger to display result */
+
+ ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
+ (local_obj_desc, walk_state));
+
+ /*
+ * Delete the predicate result object (we know that
+ * we don't need it anymore)
+ */
+ if (local_obj_desc != obj_desc) {
+ acpi_ut_remove_reference(local_obj_desc);
+ }
+ acpi_ut_remove_reference(obj_desc);
+
+ walk_state->control_state->common.state = ACPI_CONTROL_NORMAL;
+ return_ACPI_STATUS(status);
+}
+
+/*****************************************************************************
+ *
+ * FUNCTION: acpi_ds_exec_begin_op
+ *
+ * PARAMETERS: walk_state - Current state of the parse tree walk
+ * out_op - Where to return op if a new one is created
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Descending callback used during the execution of control
+ * methods. This is where most operators and operands are
+ * dispatched to the interpreter.
+ *
+ ****************************************************************************/
+
+acpi_status
+acpi_ds_exec_begin_op(struct acpi_walk_state *walk_state,
+ union acpi_parse_object **out_op)
+{
+ union acpi_parse_object *op;
+ acpi_status status = AE_OK;
+ u32 opcode_class;
+
+ ACPI_FUNCTION_TRACE_PTR(ds_exec_begin_op, walk_state);
+
+ op = walk_state->op;
+ if (!op) {
+ status = acpi_ds_load2_begin_op(walk_state, out_op);
+ if (ACPI_FAILURE(status)) {
+ goto error_exit;
+ }
+
+ op = *out_op;
+ walk_state->op = op;
+ walk_state->opcode = op->common.aml_opcode;
+ walk_state->op_info =
+ acpi_ps_get_opcode_info(op->common.aml_opcode);
+
+ if (acpi_ns_opens_scope(walk_state->op_info->object_type)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "(%s) Popping scope for Op %p\n",
+ acpi_ut_get_type_name(walk_state->
+ op_info->
+ object_type),
+ op));
+
+ status = acpi_ds_scope_stack_pop(walk_state);
+ if (ACPI_FAILURE(status)) {
+ goto error_exit;
+ }
+ }
+ }
+
+ if (op == walk_state->origin) {
+ if (out_op) {
+ *out_op = op;
+ }
+
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ /*
+ * If the previous opcode was a conditional, this opcode
+ * must be the beginning of the associated predicate.
+ * Save this knowledge in the current scope descriptor
+ */
+ if ((walk_state->control_state) &&
+ (walk_state->control_state->common.state ==
+ ACPI_CONTROL_CONDITIONAL_EXECUTING)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "Exec predicate Op=%p State=%p\n", op,
+ walk_state));
+
+ walk_state->control_state->common.state =
+ ACPI_CONTROL_PREDICATE_EXECUTING;
+
+ /* Save start of predicate */
+
+ walk_state->control_state->control.predicate_op = op;
+ }
+
+ opcode_class = walk_state->op_info->class;
+
+ /* We want to send namepaths to the load code */
+
+ if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) {
+ opcode_class = AML_CLASS_NAMED_OBJECT;
+ }
+
+ /*
+ * Handle the opcode based upon the opcode type
+ */
+ switch (opcode_class) {
+ case AML_CLASS_CONTROL:
+
+ status = acpi_ds_exec_begin_control_op(walk_state, op);
+ break;
+
+ case AML_CLASS_NAMED_OBJECT:
+
+ if (walk_state->walk_type & ACPI_WALK_METHOD) {
+ /*
+ * Found a named object declaration during method execution;
+ * we must enter this object into the namespace. The created
+ * object is temporary and will be deleted upon completion of
+ * the execution of this method.
+ *
+ * Note 10/2010: Except for the Scope() op. This opcode does
+ * not actually create a new object, it refers to an existing
+ * object. However, for Scope(), we want to indeed open a
+ * new scope.
+ */
+ if (op->common.aml_opcode != AML_SCOPE_OP) {
+ status =
+ acpi_ds_load2_begin_op(walk_state, NULL);
+ } else {
+ status =
+ acpi_ds_scope_stack_push(op->named.node,
+ op->named.node->
+ type, walk_state);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+ }
+ }
+ break;
+
+ case AML_CLASS_EXECUTE:
+ case AML_CLASS_CREATE:
+
+ break;
+
+ default:
+
+ break;
+ }
+
+ /* Nothing to do here during method execution */
+
+ return_ACPI_STATUS(status);
+
+error_exit:
+ status = acpi_ds_method_error(status, walk_state);
+ return_ACPI_STATUS(status);
+}
+
+/*****************************************************************************
+ *
+ * FUNCTION: acpi_ds_exec_end_op
+ *
+ * PARAMETERS: walk_state - Current state of the parse tree walk
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Ascending callback used during the execution of control
+ * methods. The only thing we really need to do here is to
+ * notice the beginning of IF, ELSE, and WHILE blocks.
+ *
+ ****************************************************************************/
+
+acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state)
+{
+ union acpi_parse_object *op;
+ acpi_status status = AE_OK;
+ u32 op_type;
+ u32 op_class;
+ union acpi_parse_object *next_op;
+ union acpi_parse_object *first_arg;
+
+ ACPI_FUNCTION_TRACE_PTR(ds_exec_end_op, walk_state);
+
+ op = walk_state->op;
+ op_type = walk_state->op_info->type;
+ op_class = walk_state->op_info->class;
+
+ if (op_class == AML_CLASS_UNKNOWN) {
+ ACPI_ERROR((AE_INFO, "Unknown opcode 0x%X",
+ op->common.aml_opcode));
+ return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
+ }
+
+ first_arg = op->common.value.arg;
+
+ /* Init the walk state */
+
+ walk_state->num_operands = 0;
+ walk_state->operand_index = 0;
+ walk_state->return_desc = NULL;
+ walk_state->result_obj = NULL;
+
+ /* Call debugger for single step support (DEBUG build only) */
+
+ ACPI_DEBUGGER_EXEC(status =
+ acpi_db_single_step(walk_state, op, op_class));
+ ACPI_DEBUGGER_EXEC(if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);}
+ ) ;
+
+ /* Decode the Opcode Class */
+
+ switch (op_class) {
+ case AML_CLASS_ARGUMENT: /* Constants, literals, etc. */
+
+ if (walk_state->opcode == AML_INT_NAMEPATH_OP) {
+ status = acpi_ds_evaluate_name_path(walk_state);
+ if (ACPI_FAILURE(status)) {
+ goto cleanup;
+ }
+ }
+ break;
+
+ case AML_CLASS_EXECUTE: /* Most operators with arguments */
+
+ /* Build resolved operand stack */
+
+ status = acpi_ds_create_operands(walk_state, first_arg);
+ if (ACPI_FAILURE(status)) {
+ goto cleanup;
+ }
+
+ /*
+ * All opcodes require operand resolution, with the only exceptions
+ * being the object_type and size_of operators.
+ */
+ if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) {
+
+ /* Resolve all operands */
+
+ status = acpi_ex_resolve_operands(walk_state->opcode,
+ &(walk_state->
+ operands
+ [walk_state->
+ num_operands - 1]),
+ walk_state);
+ }
+
+ if (ACPI_SUCCESS(status)) {
+ /*
+ * Dispatch the request to the appropriate interpreter handler
+ * routine. There is one routine per opcode "type" based upon the
+ * number of opcode arguments and return type.
+ */
+ status =
+ acpi_gbl_op_type_dispatch[op_type] (walk_state);
+ } else {
+ /*
+ * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the
+ * Local is uninitialized.
+ */
+ if ((status == AE_AML_UNINITIALIZED_LOCAL) &&
+ (walk_state->opcode == AML_STORE_OP) &&
+ (walk_state->operands[0]->common.type ==
+ ACPI_TYPE_LOCAL_REFERENCE)
+ && (walk_state->operands[1]->common.type ==
+ ACPI_TYPE_LOCAL_REFERENCE)
+ && (walk_state->operands[0]->reference.class ==
+ walk_state->operands[1]->reference.class)
+ && (walk_state->operands[0]->reference.value ==
+ walk_state->operands[1]->reference.value)) {
+ status = AE_OK;
+ } else {
+ ACPI_EXCEPTION((AE_INFO, status,
+ "While resolving operands for [%s]",
+ acpi_ps_get_opcode_name
+ (walk_state->opcode)));
+ }
+ }
+
+ /* Always delete the argument objects and clear the operand stack */
+
+ acpi_ds_clear_operands(walk_state);
+
+ /*
+ * If a result object was returned from above, push it on the
+ * current result stack
+ */
+ if (ACPI_SUCCESS(status) && walk_state->result_obj) {
+ status =
+ acpi_ds_result_push(walk_state->result_obj,
+ walk_state);
+ }
+ break;
+
+ default:
+
+ switch (op_type) {
+ case AML_TYPE_CONTROL: /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
+
+ /* 1 Operand, 0 external_result, 0 internal_result */
+
+ status = acpi_ds_exec_end_control_op(walk_state, op);
+
+ break;
+
+ case AML_TYPE_METHOD_CALL:
+ /*
+ * If the method is referenced from within a package
+ * declaration, it is not a invocation of the method, just
+ * a reference to it.
+ */
+ if ((op->asl.parent) &&
+ ((op->asl.parent->asl.aml_opcode == AML_PACKAGE_OP)
+ || (op->asl.parent->asl.aml_opcode ==
+ AML_VAR_PACKAGE_OP))) {
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "Method Reference in a Package, Op=%p\n",
+ op));
+
+ op->common.node =
+ (struct acpi_namespace_node *)op->asl.value.
+ arg->asl.node;
+ acpi_ut_add_reference(op->asl.value.arg->asl.
+ node->object);
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "Method invocation, Op=%p\n", op));
+
+ /*
+ * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains
+ * the method Node pointer
+ */
+ /* next_op points to the op that holds the method name */
+
+ next_op = first_arg;
+
+ /* next_op points to first argument op */
+
+ next_op = next_op->common.next;
+
+ /*
+ * Get the method's arguments and put them on the operand stack
+ */
+ status = acpi_ds_create_operands(walk_state, next_op);
+ if (ACPI_FAILURE(status)) {
+ break;
+ }
+
+ /*
+ * Since the operands will be passed to another control method,
+ * we must resolve all local references here (Local variables,
+ * arguments to *this* method, etc.)
+ */
+ status = acpi_ds_resolve_operands(walk_state);
+ if (ACPI_FAILURE(status)) {
+
+ /* On error, clear all resolved operands */
+
+ acpi_ds_clear_operands(walk_state);
+ break;
+ }
+
+ /*
+ * Tell the walk loop to preempt this running method and
+ * execute the new method
+ */
+ status = AE_CTRL_TRANSFER;
+
+ /*
+ * Return now; we don't want to disturb anything,
+ * especially the operand count!
+ */
+ return_ACPI_STATUS(status);
+
+ case AML_TYPE_CREATE_FIELD:
+
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "Executing CreateField Buffer/Index Op=%p\n",
+ op));
+
+ status = acpi_ds_load2_end_op(walk_state);
+ if (ACPI_FAILURE(status)) {
+ break;
+ }
+
+ status =
+ acpi_ds_eval_buffer_field_operands(walk_state, op);
+ break;
+
+ case AML_TYPE_CREATE_OBJECT:
+
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "Executing CreateObject (Buffer/Package) Op=%p\n",
+ op));
+
+ switch (op->common.parent->common.aml_opcode) {
+ case AML_NAME_OP:
+ /*
+ * Put the Node on the object stack (Contains the ACPI Name
+ * of this object)
+ */
+ walk_state->operands[0] =
+ (void *)op->common.parent->common.node;
+ walk_state->num_operands = 1;
+
+ status = acpi_ds_create_node(walk_state,
+ op->common.parent->
+ common.node,
+ op->common.parent);
+ if (ACPI_FAILURE(status)) {
+ break;
+ }
+
+ /* Fall through */
+ /*lint -fallthrough */
+
+ case AML_INT_EVAL_SUBTREE_OP:
+
+ status =
+ acpi_ds_eval_data_object_operands
+ (walk_state, op,
+ acpi_ns_get_attached_object(op->common.
+ parent->common.
+ node));
+ break;
+
+ default:
+
+ status =
+ acpi_ds_eval_data_object_operands
+ (walk_state, op, NULL);
+ break;
+ }
+
+ /*
+ * If a result object was returned from above, push it on the
+ * current result stack
+ */
+ if (walk_state->result_obj) {
+ status =
+ acpi_ds_result_push(walk_state->result_obj,
+ walk_state);
+ }
+ break;
+
+ case AML_TYPE_NAMED_FIELD:
+ case AML_TYPE_NAMED_COMPLEX:
+ case AML_TYPE_NAMED_SIMPLE:
+ case AML_TYPE_NAMED_NO_OBJ:
+
+ status = acpi_ds_load2_end_op(walk_state);
+ if (ACPI_FAILURE(status)) {
+ break;
+ }
+
+ if (op->common.aml_opcode == AML_REGION_OP) {
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "Executing OpRegion Address/Length Op=%p\n",
+ op));
+
+ status =
+ acpi_ds_eval_region_operands(walk_state,
+ op);
+ if (ACPI_FAILURE(status)) {
+ break;
+ }
+ } else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "Executing DataTableRegion Strings Op=%p\n",
+ op));
+
+ status =
+ acpi_ds_eval_table_region_operands
+ (walk_state, op);
+ if (ACPI_FAILURE(status)) {
+ break;
+ }
+ } else if (op->common.aml_opcode == AML_BANK_FIELD_OP) {
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "Executing BankField Op=%p\n",
+ op));
+
+ status =
+ acpi_ds_eval_bank_field_operands(walk_state,
+ op);
+ if (ACPI_FAILURE(status)) {
+ break;
+ }
+ }
+ break;
+
+ case AML_TYPE_UNDEFINED:
+
+ ACPI_ERROR((AE_INFO,
+ "Undefined opcode type Op=%p", op));
+ return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
+
+ case AML_TYPE_BOGUS:
+
+ ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
+ "Internal opcode=%X type Op=%p\n",
+ walk_state->opcode, op));
+ break;
+
+ default:
+
+ ACPI_ERROR((AE_INFO,
+ "Unimplemented opcode, class=0x%X type=0x%X Opcode=0x%X Op=%p",
+ op_class, op_type, op->common.aml_opcode,
+ op));
+
+ status = AE_NOT_IMPLEMENTED;
+ break;
+ }
+ }
+
+ /*
+ * ACPI 2.0 support for 64-bit integers: Truncate numeric
+ * result value if we are executing from a 32-bit ACPI table
+ */
+ (void)acpi_ex_truncate_for32bit_table(walk_state->result_obj);
+
+ /*
+ * Check if we just completed the evaluation of a
+ * conditional predicate
+ */
+ if ((ACPI_SUCCESS(status)) &&
+ (walk_state->control_state) &&
+ (walk_state->control_state->common.state ==
+ ACPI_CONTROL_PREDICATE_EXECUTING) &&
+ (walk_state->control_state->control.predicate_op == op)) {
+ status =
+ acpi_ds_get_predicate_value(walk_state,
+ walk_state->result_obj);
+ walk_state->result_obj = NULL;
+ }
+
+cleanup:
+
+ if (walk_state->result_obj) {
+
+ /* Break to debugger to display result */
+
+ ACPI_DEBUGGER_EXEC(acpi_db_display_result_object
+ (walk_state->result_obj, walk_state));
+
+ /*
+ * Delete the result op if and only if:
+ * Parent will not use the result -- such as any
+ * non-nested type2 op in a method (parent will be method)
+ */
+ acpi_ds_delete_result_if_not_used(op, walk_state->result_obj,
+ walk_state);
+ }
+#ifdef _UNDER_DEVELOPMENT
+
+ if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) {
+ acpi_db_method_end(walk_state);
+ }
+#endif
+
+ /* Invoke exception handler on error */
+
+ if (ACPI_FAILURE(status)) {
+ status = acpi_ds_method_error(status, walk_state);
+ }
+
+ /* Always clear the object stack */
+
+ walk_state->num_operands = 0;
+ return_ACPI_STATUS(status);
+}
Code Review / kvmfornfv.git / blobdiff