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ACPICA: Fix for Alias references within Package objects

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This fixes a problem where a reference to an Alias within the
definition of a Package was not always resolved properly. Aliases
to objects like Processors, ThermalZones, etc. were resolved to the
actual object instead of a reference to the object as it should be.
Package objects are only allowed to contain integer, string,
buffer, package, and reference objects.

https://bugzilla.redhat.com/show_bug.cgi?id=608648

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore 2010-07-06 10:37:13 +08:00 committed by Len Brown
parent 150dba38f0
commit 09079250db
1 changed files with 15 additions and 1 deletions
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16
drivers/acpi/acpica/dsobject.c
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@ -81,6 +81,7 @@ acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
{ {
union acpi_operand_object *obj_desc; union acpi_operand_object *obj_desc;
acpi_status status; acpi_status status;
acpi_object_type type;
ACPI_FUNCTION_TRACE(ds_build_internal_object); ACPI_FUNCTION_TRACE(ds_build_internal_object);
@ -172,7 +173,20 @@ acpi_ds_build_internal_object(struct acpi_walk_state *walk_state,
return_ACPI_STATUS(status); return_ACPI_STATUS(status);
} }
switch (op->common.node->type) { /*
* Special handling for Alias objects. We need to setup the type
* and the Op->Common.Node to point to the Alias target. Note,
* Alias has at most one level of indirection internally.
*/
type = op->common.node->type;
if (type == ACPI_TYPE_LOCAL_ALIAS) {
type = obj_desc->common.type;
op->common.node =
ACPI_CAST_PTR(struct acpi_namespace_node,
op->common.node->object);
}
switch (type) {
/* /*
* For these types, we need the actual node, not the subobject. * For these types, we need the actual node, not the subobject.
* However, the subobject did not get an extra reference count above. * However, the subobject did not get an extra reference count above.