ACPICA: Fix extraneous warning if _DSM returns a package

_DSM can return any type of object, so validation on the return
type cannot be performed. ACPICA BZ 802.

http://www.acpica.org/bugzilla/show_bug.cgi?id=802

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>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/acpi/acpica/nspredef.c b/drivers/acpi/acpica/nspredef.c
index 8314e6a9e72..f8427afeebd 100644
--- a/drivers/acpi/acpica/nspredef.c
+++ b/drivers/acpi/acpica/nspredef.c
@@ -193,11 +193,15 @@ acpi_ns_check_predefined_names(struct acpi_namespace_node *node,
         }
 
         /*
-         * We have a return value, but if one wasn't expected, just exit, this is
+         * 1) We have a return value, but if one wasn't expected, just exit, this is
          * not a problem. For example, if the "Implicit Return" feature is
          * enabled, methods will always return a value.
+         *
+         * 2) If the return value can be of any type, then we cannot perform any
+         * validation, exit.
          */
-        if (!predefined->info.expected_btypes) {
+        if ((!predefined->info.expected_btypes) ||
+            (predefined->info.expected_btypes == ACPI_RTYPE_ALL)) {
                 goto cleanup;
         }