diff options
Diffstat (limited to 'drivers/acpi/events/evregion.c')
| -rw-r--r-- | drivers/acpi/events/evregion.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/acpi/events/evregion.c b/drivers/acpi/events/evregion.c index 6da58e77641..b831ec4bcae 100644 --- a/drivers/acpi/events/evregion.c +++ b/drivers/acpi/events/evregion.c @@ -164,6 +164,7 @@ acpi_status acpi_ev_initialize_op_regions(void) * Run the _REG methods for op_regions in each default address space */ for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++) { + /* TBD: Make sure handler is the DEFAULT handler, otherwise * _REG will have already been run. */ @@ -315,6 +316,7 @@ acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, */ region_setup = handler_desc->address_space.setup; if (!region_setup) { + /* No initialization routine, exit with error */ ACPI_ERROR((AE_INFO, @@ -361,6 +363,7 @@ acpi_ev_address_space_dispatch(union acpi_operand_object *region_obj, region_obj->region.flags |= AOPOBJ_SETUP_COMPLETE; if (region_obj2->extra.region_context) { + /* The handler for this region was already installed */ ACPI_MEM_FREE(region_context); @@ -463,6 +466,7 @@ acpi_ev_detach_region(union acpi_operand_object *region_obj, handler_obj = region_obj->region.handler; if (!handler_obj) { + /* This region has no handler, all done */ return_VOID; @@ -474,6 +478,7 @@ acpi_ev_detach_region(union acpi_operand_object *region_obj, last_obj_ptr = &handler_obj->address_space.region_list; while (obj_desc) { + /* Is this the correct Region? */ if (obj_desc == region_obj) { @@ -666,6 +671,7 @@ acpi_ev_install_handler(acpi_handle obj_handle, obj_desc = acpi_ns_get_attached_object(node); if (!obj_desc) { + /* No object, just exit */ return (AE_OK); @@ -674,10 +680,12 @@ acpi_ev_install_handler(acpi_handle obj_handle, /* Devices are handled different than regions */ if (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_DEVICE) { + /* Check if this Device already has a handler for this address space */ next_handler_obj = obj_desc->device.handler; while (next_handler_obj) { + /* Found a handler, is it for the same address space? */ if (next_handler_obj->address_space.space_id == @@ -839,6 +847,7 @@ acpi_ev_install_space_handler(struct acpi_namespace_node * node, /* Walk the handler list for this device */ while (handler_obj) { + /* Same space_id indicates a handler already installed */ if (handler_obj->address_space.space_id == space_id) { @@ -1035,6 +1044,7 @@ acpi_ev_reg_run(acpi_handle obj_handle, obj_desc = acpi_ns_get_attached_object(node); if (!obj_desc) { + /* No object, just exit */ return (AE_OK); |