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path: root/drivers/acpi/executer/exresolv.c
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Diffstat (limited to 'drivers/acpi/executer/exresolv.c')
-rw-r--r--drivers/acpi/executer/exresolv.c55
1 files changed, 26 insertions, 29 deletions
diff --git a/drivers/acpi/executer/exresolv.c b/drivers/acpi/executer/exresolv.c
index 6c64e55..b35f7c8 100644
--- a/drivers/acpi/executer/exresolv.c
+++ b/drivers/acpi/executer/exresolv.c
@@ -6,7 +6,7 @@
*****************************************************************************/
/*
- * Copyright (C) 2000 - 2007, R. Byron Moore
+ * Copyright (C) 2000 - 2008, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -140,7 +140,6 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
{
acpi_status status = AE_OK;
union acpi_operand_object *stack_desc;
- void *temp_node;
union acpi_operand_object *obj_desc = NULL;
u16 opcode;
@@ -156,23 +155,6 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
opcode = stack_desc->reference.opcode;
switch (opcode) {
- case AML_NAME_OP:
-
- /*
- * Convert name reference to a namespace node
- * Then, acpi_ex_resolve_node_to_value can be used to get the value
- */
- temp_node = stack_desc->reference.object;
-
- /* Delete the Reference Object */
-
- acpi_ut_remove_reference(stack_desc);
-
- /* Return the namespace node */
-
- (*stack_ptr) = temp_node;
- break;
-
case AML_LOCAL_OP:
case AML_ARG_OP:
@@ -207,15 +189,25 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
switch (stack_desc->reference.target_type) {
case ACPI_TYPE_BUFFER_FIELD:
- /* Just return - leave the Reference on the stack */
+ /* Just return - do not dereference */
break;
case ACPI_TYPE_PACKAGE:
+ /* If method call or copy_object - do not dereference */
+
+ if ((walk_state->opcode ==
+ AML_INT_METHODCALL_OP)
+ || (walk_state->opcode == AML_COPY_OP)) {
+ break;
+ }
+
+ /* Otherwise, dereference the package_index to a package element */
+
obj_desc = *stack_desc->reference.where;
if (obj_desc) {
/*
- * Valid obj descriptor, copy pointer to return value
+ * Valid object descriptor, copy pointer to return value
* (i.e., dereference the package index)
* Delete the ref object, increment the returned object
*/
@@ -224,11 +216,11 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
*stack_ptr = obj_desc;
} else {
/*
- * A NULL object descriptor means an unitialized element of
+ * A NULL object descriptor means an uninitialized element of
* the package, can't dereference it
*/
ACPI_ERROR((AE_INFO,
- "Attempt to deref an Index to NULL pkg element Idx=%p",
+ "Attempt to dereference an Index to NULL package element Idx=%p",
stack_desc));
status = AE_AML_UNINITIALIZED_ELEMENT;
}
@@ -239,7 +231,7 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
/* Invalid reference object */
ACPI_ERROR((AE_INFO,
- "Unknown TargetType %X in Index/Reference obj %p",
+ "Unknown TargetType %X in Index/Reference object %p",
stack_desc->reference.target_type,
stack_desc));
status = AE_AML_INTERNAL;
@@ -251,7 +243,7 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
case AML_DEBUG_OP:
case AML_LOAD_OP:
- /* Just leave the object as-is */
+ /* Just leave the object as-is, do not dereference */
break;
@@ -390,10 +382,10 @@ acpi_ex_resolve_multiple(struct acpi_walk_state *walk_state,
}
/*
- * For reference objects created via the ref_of or Index operators,
- * we need to get to the base object (as per the ACPI specification
- * of the object_type and size_of operators). This means traversing
- * the list of possibly many nested references.
+ * For reference objects created via the ref_of, Index, or Load/load_table
+ * operators, we need to get to the base object (as per the ACPI
+ * specification of the object_type and size_of operators). This means
+ * traversing the list of possibly many nested references.
*/
while (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_REFERENCE) {
switch (obj_desc->reference.opcode) {
@@ -463,6 +455,11 @@ acpi_ex_resolve_multiple(struct acpi_walk_state *walk_state,
}
break;
+ case AML_LOAD_OP:
+
+ type = ACPI_TYPE_DDB_HANDLE;
+ goto exit;
+
case AML_LOCAL_OP:
case AML_ARG_OP: