ACPICA: Fix to allow aliases within ASL namepaths
Fixes a problem where the use of an alias within a namepath
would result in a not found error or cause the compiler to fault.
Also now allows forward references from the Alias operator itself.
ACPICA BZ 738.
http://www.acpica.org/bugzilla/show_bug.cgi?id=738
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>
diff --git a/drivers/acpi/namespace/nsaccess.c b/drivers/acpi/namespace/nsaccess.c
index 29c7c27..35b0e46 100644
--- a/drivers/acpi/namespace/nsaccess.c
+++ b/drivers/acpi/namespace/nsaccess.c
@@ -588,6 +588,10 @@
* segments).
*/
if (this_node->type == ACPI_TYPE_LOCAL_ALIAS) {
+ if (!this_node->object) {
+ return_ACPI_STATUS(AE_NOT_EXIST);
+ }
+
if (acpi_ns_opens_scope
(((struct acpi_namespace_node *)this_node->
object)->type)) {