/******************************************************************************* * * FUNCTION: acpi_install_address_space_handler_internal * * PARAMETERS: device - Handle for the device * space_id - The address space ID * handler - Address of the handler * setup - Address of the setup function * context - Value passed to the handler on each access * Run_reg - Run _REG methods for this address space? * * RETURN: Status * * DESCRIPTION: Install a handler for all op_regions of a given space_id. * * NOTE: This function should only be called after acpi_enable_subsystem has * been called. This is because any _REG methods associated with the Space ID * are executed here, and these methods can only be safely executed after * the default handlers have been installed and the hardware has been * initialized (via acpi_enable_subsystem.) * To avoid this problem pass FALSE for Run_Reg and later on call * acpi_execute_reg_methods() to execute _REG. *
******************************************************************************/ static acpi_status
acpi_install_address_space_handler_internal(acpi_handle device,
acpi_adr_space_type space_id,
acpi_adr_space_handler handler,
acpi_adr_space_setup setup, void *context, u8 run_reg)
{ struct acpi_namespace_node *node;
acpi_status status;
while (region_obj) { /* * First disassociate the handler from the region. * * NOTE: this doesn't mean that the region goes away * The region is just inaccessible as indicated to * the _REG method
*/
acpi_ev_detach_region(region_obj, TRUE);
/* * Walk the list: Just grab the head because the * detach_region removed the previous head.
*/
region_obj =
handler_obj->address_space.region_list;
}
ACPI_EXPORT_SYMBOL(acpi_remove_address_space_handler) /******************************************************************************* * * FUNCTION: acpi_execute_reg_methods * * PARAMETERS: device - Handle for the device * max_depth - Depth to which search for _REG * space_id - The address space ID * * RETURN: Status * * DESCRIPTION: Execute _REG for all op_regions of a given space_id. *
******************************************************************************/
acpi_status
acpi_execute_reg_methods(acpi_handle device, u32 max_depth,
acpi_adr_space_type space_id)
{ struct acpi_namespace_node *node;
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_execute_reg_methods);
/* Parameter validation */
if (!device) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Convert and validate the device handle */
node = acpi_ns_validate_handle(device); if (node) {
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