ACPICA: Fixed a problem with CopyObject used in conjunction with the Index operator

The reference was incorrectly dereferenced before the copy. The
reference is now correctly copied.

http://bugzilla.kernel.org/show_bug.cgi?id=5391

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/drivers/acpi/executer/exresnte.c b/drivers/acpi/executer/exresnte.c
index 79a0d281f96b..42c8a0f8894c 100644
--- a/drivers/acpi/executer/exresnte.c
+++ b/drivers/acpi/executer/exresnte.c
@@ -239,13 +239,12 @@ acpi_ex_resolve_node_to_value(struct acpi_namespace_node **object_ptr,
         case ACPI_TYPE_LOCAL_REFERENCE:
 
                 switch (source_desc->reference.opcode) {
-                case AML_LOAD_OP:
+                case AML_LOAD_OP:       /* This is a ddb_handle */
+                case AML_REF_OF_OP:
+                case AML_INDEX_OP:
 
-                        /* This is a ddb_handle */
                         /* Return an additional reference to the object */
 
-                case AML_REF_OF_OP:
-
                         obj_desc = source_desc;
                         acpi_ut_add_reference(obj_desc);
                         break;