ACPICA: Module-level code: enable _REG execution in same scope

This change enables the execution of _REG methods that appear
in the same scope as the module-level code, in resonse to an
operation region declaration within the module-level code.

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

diff --git a/drivers/acpi/acpica/acobject.h b/drivers/acpi/acpica/acobject.h
index b39d682..64062b1 100644 (file)
--- a/drivers/acpi/acpica/acobject.h
+++ b/drivers/acpi/acpica/acobject.h
@@ -180,7 +180,11 @@ struct acpi_object_method {
        u8 sync_level;
        union acpi_operand_object *mutex;
        u8 *aml_start;
-       ACPI_INTERNAL_METHOD implementation;
+       union {
+               ACPI_INTERNAL_METHOD implementation;
+               union acpi_operand_object *handler;
+       } extra;
+
        u32 aml_length;
        u8 thread_count;
        acpi_owner_id owner_id;

diff --git a/drivers/acpi/acpica/dsmethod.c b/drivers/acpi/acpica/dsmethod.c
index 567a489..e786f9f 100644 (file)
--- a/drivers/acpi/acpica/dsmethod.c
+++ b/drivers/acpi/acpica/dsmethod.c
@@ -414,7 +414,7 @@ acpi_ds_call_control_method(struct acpi_thread_state *thread,
        /* Invoke an internal method if necessary */
 
        if (obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) {
-               status = obj_desc->method.implementation(next_walk_state);
+               status = obj_desc->method.extra.implementation(next_walk_state);
                if (status == AE_OK) {
                        status = AE_CTRL_TERMINATE;
                }

diff --git a/drivers/acpi/acpica/evrgnini.c b/drivers/acpi/acpica/evrgnini.c
index cf29c49..ff16805 100644 (file)
--- a/drivers/acpi/acpica/evrgnini.c
+++ b/drivers/acpi/acpica/evrgnini.c
@@ -575,6 +575,21 @@ acpi_ev_initialize_region(union acpi_operand_object *region_obj,
                                handler_obj = obj_desc->thermal_zone.handler;
                                break;
 
+                       case ACPI_TYPE_METHOD:
+                               /*
+                                * If we are executing module level code, the original
+                                * Node's object was replaced by this Method object and we
+                                * saved the handler in the method object.
+                                *
+                                * See acpi_ns_exec_module_code
+                                */
+                               if (obj_desc->method.
+                                   flags & AOPOBJ_MODULE_LEVEL) {
+                                       handler_obj =
+                                           obj_desc->method.extra.handler;
+                               }
+                               break;
+
                        default:
                                /* Ignore other objects */
                                break;

diff --git a/drivers/acpi/acpica/nsaccess.c b/drivers/acpi/acpica/nsaccess.c
index 9c3cdbe..d622ba7 100644 (file)
--- a/drivers/acpi/acpica/nsaccess.c
+++ b/drivers/acpi/acpica/nsaccess.c
@@ -165,7 +165,7 @@ acpi_status acpi_ns_root_initialize(void)
 
                                obj_desc->method.method_flags =
                                    AML_METHOD_INTERNAL_ONLY;
-                               obj_desc->method.implementation =
+                               obj_desc->method.extra.implementation =
                                    acpi_ut_osi_implementation;
 #endif
                                break;

diff --git a/drivers/acpi/acpica/nseval.c b/drivers/acpi/acpica/nseval.c
index 65e0d1a..af9fe91 100644 (file)
--- a/drivers/acpi/acpica/nseval.c
+++ b/drivers/acpi/acpica/nseval.c
@@ -381,6 +381,18 @@ acpi_ns_exec_module_code(union acpi_operand_object *method_obj,
                                    method_obj->method.next_object);
        type = acpi_ns_get_type(parent_node);
 
+       /*
+        * Get the region handler and save it in the method object. We may need
+        * this if an operation region declaration causes a _REG method to be run.
+        *
+        * We can't do this in acpi_ps_link_module_code because
+        * acpi_gbl_root_node->Object is NULL at PASS1.
+        */
+       if ((type == ACPI_TYPE_DEVICE) && parent_node->object) {
+               method_obj->method.extra.handler =
+                   parent_node->object->device.handler;
+       }
+
        /* Must clear next_object (acpi_ns_attach_object needs the field) */
 
        method_obj->method.next_object = NULL;

diff --git a/drivers/acpi/acpica/psxface.c b/drivers/acpi/acpica/psxface.c
index 12934ad..d0c1b91 100644 (file)
--- a/drivers/acpi/acpica/psxface.c
+++ b/drivers/acpi/acpica/psxface.c
@@ -287,7 +287,8 @@ acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
        /* Invoke an internal method if necessary */
 
        if (info->obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) {
-               status = info->obj_desc->method.implementation(walk_state);
+               status =
+                   info->obj_desc->method.extra.implementation(walk_state);
                info->return_object = walk_state->return_desc;
 
                /* Cleanup states */