v4.19.13 snapshot.
diff --git a/drivers/acpi/acpica/exresnte.c b/drivers/acpi/acpica/exresnte.c
new file mode 100644
index 0000000..ea4b0fe
--- /dev/null
+++ b/drivers/acpi/acpica/exresnte.c
@@ -0,0 +1,245 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: exresnte - AML Interpreter object resolution
+ *
+ * Copyright (C) 2000 - 2018, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acdispat.h"
+#include "acinterp.h"
+#include "acnamesp.h"
+
+#define _COMPONENT ACPI_EXECUTER
+ACPI_MODULE_NAME("exresnte")
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ex_resolve_node_to_value
+ *
+ * PARAMETERS: object_ptr - Pointer to a location that contains
+ * a pointer to a NS node, and will receive a
+ * pointer to the resolved object.
+ * walk_state - Current state. Valid only if executing AML
+ * code. NULL if simply resolving an object
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Resolve a Namespace node to a valued object
+ *
+ * Note: for some of the data types, the pointer attached to the Node
+ * can be either a pointer to an actual internal object or a pointer into the
+ * AML stream itself. These types are currently:
+ *
+ * ACPI_TYPE_INTEGER
+ * ACPI_TYPE_STRING
+ * ACPI_TYPE_BUFFER
+ * ACPI_TYPE_MUTEX
+ * ACPI_TYPE_PACKAGE
+ *
+ ******************************************************************************/
+acpi_status
+acpi_ex_resolve_node_to_value(struct acpi_namespace_node **object_ptr,
+ struct acpi_walk_state *walk_state)
+{
+ acpi_status status = AE_OK;
+ union acpi_operand_object *source_desc;
+ union acpi_operand_object *obj_desc = NULL;
+ struct acpi_namespace_node *node;
+ acpi_object_type entry_type;
+
+ ACPI_FUNCTION_TRACE(ex_resolve_node_to_value);
+
+ /*
+ * The stack pointer points to a struct acpi_namespace_node (Node). Get the
+ * object that is attached to the Node.
+ */
+ node = *object_ptr;
+ source_desc = acpi_ns_get_attached_object(node);
+ entry_type = acpi_ns_get_type((acpi_handle)node);
+
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Entry=%p SourceDesc=%p [%s]\n",
+ node, source_desc,
+ acpi_ut_get_type_name(entry_type)));
+
+ if ((entry_type == ACPI_TYPE_LOCAL_ALIAS) ||
+ (entry_type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
+
+ /* There is always exactly one level of indirection */
+
+ node = ACPI_CAST_PTR(struct acpi_namespace_node, node->object);
+ source_desc = acpi_ns_get_attached_object(node);
+ entry_type = acpi_ns_get_type((acpi_handle)node);
+ *object_ptr = node;
+ }
+
+ /*
+ * Several object types require no further processing:
+ * 1) Device/Thermal objects don't have a "real" subobject, return Node
+ * 2) Method locals and arguments have a pseudo-Node
+ * 3) 10/2007: Added method type to assist with Package construction.
+ */
+ if ((entry_type == ACPI_TYPE_DEVICE) ||
+ (entry_type == ACPI_TYPE_THERMAL) ||
+ (entry_type == ACPI_TYPE_METHOD) ||
+ (node->flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) {
+ return_ACPI_STATUS(AE_OK);
+ }
+
+ if (!source_desc) {
+ ACPI_ERROR((AE_INFO, "No object attached to node [%4.4s] %p",
+ node->name.ascii, node));
+ return_ACPI_STATUS(AE_AML_UNINITIALIZED_NODE);
+ }
+
+ /*
+ * Action is based on the type of the Node, which indicates the type
+ * of the attached object or pointer
+ */
+ switch (entry_type) {
+ case ACPI_TYPE_PACKAGE:
+
+ if (source_desc->common.type != ACPI_TYPE_PACKAGE) {
+ ACPI_ERROR((AE_INFO, "Object not a Package, type %s",
+ acpi_ut_get_object_type_name(source_desc)));
+ return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+ }
+
+ status = acpi_ds_get_package_arguments(source_desc);
+ if (ACPI_SUCCESS(status)) {
+
+ /* Return an additional reference to the object */
+
+ obj_desc = source_desc;
+ acpi_ut_add_reference(obj_desc);
+ }
+ break;
+
+ case ACPI_TYPE_BUFFER:
+
+ if (source_desc->common.type != ACPI_TYPE_BUFFER) {
+ ACPI_ERROR((AE_INFO, "Object not a Buffer, type %s",
+ acpi_ut_get_object_type_name(source_desc)));
+ return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+ }
+
+ status = acpi_ds_get_buffer_arguments(source_desc);
+ if (ACPI_SUCCESS(status)) {
+
+ /* Return an additional reference to the object */
+
+ obj_desc = source_desc;
+ acpi_ut_add_reference(obj_desc);
+ }
+ break;
+
+ case ACPI_TYPE_STRING:
+
+ if (source_desc->common.type != ACPI_TYPE_STRING) {
+ ACPI_ERROR((AE_INFO, "Object not a String, type %s",
+ acpi_ut_get_object_type_name(source_desc)));
+ return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+ }
+
+ /* Return an additional reference to the object */
+
+ obj_desc = source_desc;
+ acpi_ut_add_reference(obj_desc);
+ break;
+
+ case ACPI_TYPE_INTEGER:
+
+ if (source_desc->common.type != ACPI_TYPE_INTEGER) {
+ ACPI_ERROR((AE_INFO, "Object not a Integer, type %s",
+ acpi_ut_get_object_type_name(source_desc)));
+ return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+ }
+
+ /* Return an additional reference to the object */
+
+ obj_desc = source_desc;
+ acpi_ut_add_reference(obj_desc);
+ break;
+
+ case ACPI_TYPE_BUFFER_FIELD:
+ case ACPI_TYPE_LOCAL_REGION_FIELD:
+ case ACPI_TYPE_LOCAL_BANK_FIELD:
+ case ACPI_TYPE_LOCAL_INDEX_FIELD:
+
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "FieldRead Node=%p SourceDesc=%p Type=%X\n",
+ node, source_desc, entry_type));
+
+ status =
+ acpi_ex_read_data_from_field(walk_state, source_desc,
+ &obj_desc);
+ break;
+
+ /* For these objects, just return the object attached to the Node */
+
+ case ACPI_TYPE_MUTEX:
+ case ACPI_TYPE_POWER:
+ case ACPI_TYPE_PROCESSOR:
+ case ACPI_TYPE_EVENT:
+ case ACPI_TYPE_REGION:
+
+ /* Return an additional reference to the object */
+
+ obj_desc = source_desc;
+ acpi_ut_add_reference(obj_desc);
+ break;
+
+ /* TYPE_ANY is untyped, and thus there is no object associated with it */
+
+ case ACPI_TYPE_ANY:
+
+ ACPI_ERROR((AE_INFO,
+ "Untyped entry %p, no attached object!", node));
+
+ return_ACPI_STATUS(AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */
+
+ case ACPI_TYPE_LOCAL_REFERENCE:
+
+ switch (source_desc->reference.class) {
+ case ACPI_REFCLASS_TABLE: /* This is a ddb_handle */
+ case ACPI_REFCLASS_REFOF:
+ case ACPI_REFCLASS_INDEX:
+
+ /* Return an additional reference to the object */
+
+ obj_desc = source_desc;
+ acpi_ut_add_reference(obj_desc);
+ break;
+
+ default:
+
+ /* No named references are allowed here */
+
+ ACPI_ERROR((AE_INFO,
+ "Unsupported Reference type 0x%X",
+ source_desc->reference.class));
+
+ return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+ }
+ break;
+
+ default:
+
+ /* Default case is for unknown types */
+
+ ACPI_ERROR((AE_INFO,
+ "Node %p - Unknown object type 0x%X",
+ node, entry_type));
+
+ return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
+
+ } /* switch (entry_type) */
+
+ /* Return the object descriptor */
+
+ *object_ptr = (void *)obj_desc;
+ return_ACPI_STATUS(status);
+}