diff options
Diffstat (limited to 'drivers/acpi/acpica/evrgnini.c')
| -rw-r--r-- | drivers/acpi/acpica/evrgnini.c | 59 |
1 files changed, 24 insertions, 35 deletions
diff --git a/drivers/acpi/acpica/evrgnini.c b/drivers/acpi/acpica/evrgnini.c index 75ddd160a716..a9092251ce80 100644 --- a/drivers/acpi/acpica/evrgnini.c +++ b/drivers/acpi/acpica/evrgnini.c @@ -479,7 +479,6 @@ acpi_ev_default_region_setup(acpi_handle handle, * FUNCTION: acpi_ev_initialize_region * * PARAMETERS: region_obj - Region we are initializing - * acpi_ns_locked - Is namespace locked? * * RETURN: Status * @@ -497,19 +496,28 @@ acpi_ev_default_region_setup(acpi_handle handle, * MUTEX: Interpreter should be unlocked, because we may run the _REG * method for this region. * + * NOTE: Possible incompliance: + * There is a behavior conflict in automatic _REG execution: + * 1. When the interpreter is evaluating a method, we can only + * automatically run _REG for the following case: + * operation_region (OPR1, 0x80, 0x1000010, 0x4) + * 2. When the interpreter is loading a table, we can also + * automatically run _REG for the following case: + * operation_region (OPR1, 0x80, 0x1000010, 0x4) + * Though this may not be compliant to the de-facto standard, the + * logic is kept in order not to trigger regressions. And keeping + * this logic should be taken care by the caller of this function. + * ******************************************************************************/ -acpi_status -acpi_ev_initialize_region(union acpi_operand_object *region_obj, - u8 acpi_ns_locked) +acpi_status acpi_ev_initialize_region(union acpi_operand_object *region_obj) { union acpi_operand_object *handler_obj; union acpi_operand_object *obj_desc; acpi_adr_space_type space_id; struct acpi_namespace_node *node; - acpi_status status; - ACPI_FUNCTION_TRACE_U32(ev_initialize_region, acpi_ns_locked); + ACPI_FUNCTION_TRACE(ev_initialize_region); if (!region_obj) { return_ACPI_STATUS(AE_BAD_PARAMETER); @@ -580,39 +588,17 @@ acpi_ev_initialize_region(union acpi_operand_object *region_obj, handler_obj, region_obj, obj_desc)); - status = - acpi_ev_attach_region(handler_obj, - region_obj, - acpi_ns_locked); + (void)acpi_ev_attach_region(handler_obj, + region_obj, FALSE); /* * Tell all users that this region is usable by * running the _REG method */ - if (acpi_ns_locked) { - status = - acpi_ut_release_mutex - (ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - } - acpi_ex_exit_interpreter(); - status = - acpi_ev_execute_reg_method(region_obj, - ACPI_REG_CONNECT); + (void)acpi_ev_execute_reg_method(region_obj, + ACPI_REG_CONNECT); acpi_ex_enter_interpreter(); - - if (acpi_ns_locked) { - status = - acpi_ut_acquire_mutex - (ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - } - return_ACPI_STATUS(AE_OK); } } @@ -622,12 +608,15 @@ acpi_ev_initialize_region(union acpi_operand_object *region_obj, node = node->parent; } - /* If we get here, there is no handler for this region */ - + /* + * If we get here, there is no handler for this region. This is not + * fatal because many regions get created before a handler is installed + * for said region. + */ ACPI_DEBUG_PRINT((ACPI_DB_OPREGION, "No handler for RegionType %s(%X) (RegionObj %p)\n", acpi_ut_get_region_name(space_id), space_id, region_obj)); - return_ACPI_STATUS(AE_NOT_EXIST); + return_ACPI_STATUS(AE_OK); } |
