ACPICA: Dispatcher: Fix interpreter locking around acpi_ev_initialize_region()

[cascardo/linux.git] / drivers / acpi / acpica / dsmethod.c

diff --git a/drivers/acpi/acpica/dsmethod.c b/drivers/acpi/acpica/dsmethod.c
index 32e9ddc..2b3210f 100644 (file)
--- a/drivers/acpi/acpica/dsmethod.c
+++ b/drivers/acpi/acpica/dsmethod.c
@@ -99,14 +99,11 @@ acpi_ds_auto_serialize_method(struct acpi_namespace_node *node,
                          "Method auto-serialization parse [%4.4s] %p\n",
                          acpi_ut_get_node_name(node), node));
 
-       acpi_ex_enter_interpreter();
-
        /* Create/Init a root op for the method parse tree */
 
        op = acpi_ps_alloc_op(AML_METHOD_OP, obj_desc->method.aml_start);
        if (!op) {
-               status = AE_NO_MEMORY;
-               goto unlock;
+               return_ACPI_STATUS(AE_NO_MEMORY);
        }
 
        acpi_ps_set_name(op, node->name.integer);
@@ -118,8 +115,7 @@ acpi_ds_auto_serialize_method(struct acpi_namespace_node *node,
            acpi_ds_create_walk_state(node->owner_id, NULL, NULL, NULL);
        if (!walk_state) {
                acpi_ps_free_op(op);
-               status = AE_NO_MEMORY;
-               goto unlock;
+               return_ACPI_STATUS(AE_NO_MEMORY);
        }
 
        status = acpi_ds_init_aml_walk(walk_state, op, node,
@@ -138,8 +134,6 @@ acpi_ds_auto_serialize_method(struct acpi_namespace_node *node,
        status = acpi_ps_parse_aml(walk_state);
 
        acpi_ps_delete_parse_tree(op);
-unlock:
-       acpi_ex_exit_interpreter();
        return_ACPI_STATUS(status);
 }
 
@@ -730,26 +724,6 @@ acpi_ds_terminate_control_method(union acpi_operand_object *method_desc,
 
                acpi_ds_method_data_delete_all(walk_state);
 
-               /*
-                * If method is serialized, release the mutex and restore the
-                * current sync level for this thread
-                */
-               if (method_desc->method.mutex) {
-
-                       /* Acquisition Depth handles recursive calls */
-
-                       method_desc->method.mutex->mutex.acquisition_depth--;
-                       if (!method_desc->method.mutex->mutex.acquisition_depth) {
-                               walk_state->thread->current_sync_level =
-                                   method_desc->method.mutex->mutex.
-                                   original_sync_level;
-
-                               acpi_os_release_mutex(method_desc->method.
-                                                     mutex->mutex.os_mutex);
-                               method_desc->method.mutex->mutex.thread_id = 0;
-                       }
-               }
-
                /*
                 * Delete any namespace objects created anywhere within the
                 * namespace by the execution of this method. Unless:
@@ -786,6 +760,26 @@ acpi_ds_terminate_control_method(union acpi_operand_object *method_desc,
                                    ~ACPI_METHOD_MODIFIED_NAMESPACE;
                        }
                }
+
+               /*
+                * If method is serialized, release the mutex and restore the
+                * current sync level for this thread
+                */
+               if (method_desc->method.mutex) {
+
+                       /* Acquisition Depth handles recursive calls */
+
+                       method_desc->method.mutex->mutex.acquisition_depth--;
+                       if (!method_desc->method.mutex->mutex.acquisition_depth) {
+                               walk_state->thread->current_sync_level =
+                                   method_desc->method.mutex->mutex.
+                                   original_sync_level;
+
+                               acpi_os_release_mutex(method_desc->method.
+                                                     mutex->mutex.os_mutex);
+                               method_desc->method.mutex->mutex.thread_id = 0;
+                       }
+               }
        }
 
        /* Decrement the thread count on the method */