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path: root/drivers/acpi/dispatcher/dsobject.c
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Diffstat (limited to 'drivers/acpi/dispatcher/dsobject.c')
-rw-r--r--drivers/acpi/dispatcher/dsobject.c101
1 files changed, 78 insertions, 23 deletions
diff --git a/drivers/acpi/dispatcher/dsobject.c b/drivers/acpi/dispatcher/dsobject.c
index 954ac8ce958..1022e38994c 100644
--- a/drivers/acpi/dispatcher/dsobject.c
+++ b/drivers/acpi/dispatcher/dsobject.c
@@ -5,7 +5,7 @@
*****************************************************************************/
/*
- * 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
@@ -157,7 +157,9 @@ acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
* will remain as named references. This behavior is not described
* in the ACPI spec, but it appears to be an oversight.
*/
- obj_desc = (union acpi_operand_object *)op->common.node;
+ obj_desc =
+ ACPI_CAST_PTR(union acpi_operand_object,
+ op->common.node);
status =
acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR
@@ -172,7 +174,19 @@ acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
switch (op->common.node->type) {
/*
* For these types, we need the actual node, not the subobject.
- * However, the subobject got an extra reference count above.
+ * However, the subobject did not get an extra reference count above.
+ *
+ * TBD: should ex_resolve_node_to_value be changed to fix this?
+ */
+ case ACPI_TYPE_DEVICE:
+ case ACPI_TYPE_THERMAL:
+
+ acpi_ut_add_reference(op->common.node->object);
+
+ /*lint -fallthrough */
+ /*
+ * For these types, we need the actual node, not the subobject.
+ * The subobject got an extra reference count in ex_resolve_node_to_value.
*/
case ACPI_TYPE_MUTEX:
case ACPI_TYPE_METHOD:
@@ -180,25 +194,15 @@ acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_EVENT:
case ACPI_TYPE_REGION:
- case ACPI_TYPE_DEVICE:
- case ACPI_TYPE_THERMAL:
- obj_desc =
- (union acpi_operand_object *)op->common.
- node;
+ /* We will create a reference object for these types below */
break;
default:
- break;
- }
-
- /*
- * If above resolved to an operand object, we are done. Otherwise,
- * we have a NS node, we must create the package entry as a named
- * reference.
- */
- if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) !=
- ACPI_DESC_TYPE_NAMED) {
+ /*
+ * All other types - the node was resolved to an actual
+ * object, we are done.
+ */
goto exit;
}
}
@@ -223,7 +227,7 @@ acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
exit:
*obj_desc_ptr = obj_desc;
- return_ACPI_STATUS(AE_OK);
+ return_ACPI_STATUS(status);
}
/*******************************************************************************
@@ -369,7 +373,9 @@ acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
union acpi_parse_object *parent;
union acpi_operand_object *obj_desc = NULL;
acpi_status status = AE_OK;
- acpi_native_uint i;
+ unsigned i;
+ u16 index;
+ u16 reference_count;
ACPI_FUNCTION_TRACE(ds_build_internal_package_obj);
@@ -447,13 +453,60 @@ acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
package.
elements[i]);
}
+
+ if (*obj_desc_ptr) {
+
+ /* Existing package, get existing reference count */
+
+ reference_count =
+ (*obj_desc_ptr)->common.reference_count;
+ if (reference_count > 1) {
+
+ /* Make new element ref count match original ref count */
+
+ for (index = 0; index < (reference_count - 1);
+ index++) {
+ acpi_ut_add_reference((obj_desc->
+ package.
+ elements[i]));
+ }
+ }
+ }
+
arg = arg->common.next;
}
- if (!arg) {
+ /* Check for match between num_elements and actual length of package_list */
+
+ if (arg) {
+ /*
+ * num_elements was exhausted, but there are remaining elements in the
+ * package_list.
+ *
+ * Note: technically, this is an error, from ACPI spec: "It is an error
+ * for NumElements to be less than the number of elements in the
+ * PackageList". However, for now, we just print an error message and
+ * no exception is returned.
+ */
+ while (arg) {
+
+ /* Find out how many elements there really are */
+
+ i++;
+ arg = arg->common.next;
+ }
+
+ ACPI_ERROR((AE_INFO,
+ "Package List length (%X) larger than NumElements count (%X), truncated\n",
+ i, element_count));
+ } else if (i < element_count) {
+ /*
+ * Arg list (elements) was exhausted, but we did not reach num_elements count.
+ * Note: this is not an error, the package is padded out with NULLs.
+ */
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Package List length larger than NumElements count (%X), truncated\n",
- element_count));
+ "Package List length (%X) smaller than NumElements count (%X), padded with null elements\n",
+ i, element_count));
}
obj_desc->package.flags |= AOPOBJ_DATA_VALID;
@@ -721,6 +774,8 @@ acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state,
/* Node was saved in Op */
obj_desc->reference.node = op->common.node;
+ obj_desc->reference.object =
+ op->common.node->object;
}
obj_desc->reference.opcode = opcode;