diff options
Diffstat (limited to 'drivers/acpi/executer/exresolv.c')
| -rw-r--r-- | drivers/acpi/executer/exresolv.c | 55 |
1 files changed, 26 insertions, 29 deletions
diff --git a/drivers/acpi/executer/exresolv.c b/drivers/acpi/executer/exresolv.c index 6c64e55dab0e..b35f7c817acf 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: |