vendor/acpica/20130725

1 files changed, 17 insertions, 1 deletions

diff --git a/source/components/namespace/nspredef.c b/source/components/namespace/nspredef.c
index 7122e7accbe14..7b7e3e34fd501 100644
--- a/source/components/namespace/nspredef.c
+++ b/source/components/namespace/nspredef.c
@@ -166,6 +166,16 @@ AcpiNsCheckReturnValue (
     }
 
     /*
+     *
+     * 4) If there is no return value and it is optional, just return
+     * AE_OK (_WAK).
+     */
+    if (!(*ReturnObjectPtr))
+    {
+        goto Exit;
+    }
+
+    /*
      * For returned Package objects, check the type of all sub-objects.
      * Note: Package may have been newly created by call above.
      */
@@ -293,7 +303,13 @@ TypeErrorExit:
 
     AcpiUtGetExpectedReturnTypes (TypeBuffer, ExpectedBtypes);
 
-    if (PackageIndex == ACPI_NOT_PACKAGE_ELEMENT)
+    if (!ReturnObject)
+    {
+        ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
+            "Expected return object of type %s",
+            TypeBuffer));
+    }
+    else if (PackageIndex == ACPI_NOT_PACKAGE_ELEMENT)
     {
         ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
             "Return type mismatch - found %s, expected %s",