ACPICA: Fixed a problem with Index references passed as method arguments

References passed as arguments to control methods were dereferenced
immediately (before control was passed to the called method). The
references are now correctly passed directly to the called
method.

http://bugzilla.kernel.org/show_bug.cgi?id=5389

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, 8 insertions, 2 deletions

diff --git a/drivers/acpi/executer/exresolv.c b/drivers/acpi/executer/exresolv.c
index 74ab220a5924..795ec8c7363c 100644
--- a/drivers/acpi/executer/exresolv.c
+++ b/drivers/acpi/executer/exresolv.c
@@ -194,6 +194,12 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
 
                         case ACPI_TYPE_PACKAGE:
 
+                                /* If method call - leave the Reference on the stack */
+
+                                if (walk_state->opcode == AML_INT_METHODCALL_OP) {
+                                        break;
+                                }
+
                                 obj_desc = *stack_desc->reference.where;
                                 if (obj_desc) {
                                         /*
@@ -210,7 +216,7 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
                                          * the package, can't dereference it
                                          */
                                         ACPI_ERROR((AE_INFO,
-                                                    "Attempt to deref an Index to NULL pkg element Idx=%p",
+                                                    "Attempt to dereference an Index to NULL package element Idx=%p",
                                                     stack_desc));
                                         status = AE_AML_UNINITIALIZED_ELEMENT;
                                 }
@@ -221,7 +227,7 @@ acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr,
                                 /* Invalid reference object */
 
                                 ACPI_ERROR((AE_INFO,
-                                            "Unknown TargetType %X in Index/Reference obj %p",
+                                            "Unknown TargetType %X in Index/Reference object %p",
                                             stack_desc->reference.target_type,
                                             stack_desc));
                                 status = AE_AML_INTERNAL;