FORCE_DETACH
*done || test_bit(FORCE_DETACH, &device->flags), dt);
set_bit(FORCE_DETACH, &device->flags);
clear_bit(FORCE_DETACH, &device->flags);
set_bit(FORCE_DETACH, &device->flags);
if (test_and_clear_bit(FORCE_DETACH, &device->flags))