Unregistering a Component
If the registered component is a driver, a kernel extension or a subsystem that can be stopped. Unregister your component at stop or unload time.
A component cannot be unregistered from the framework if it has
subcomponents. Therefore, subcomponents must be unregistered first.
Moreover, the memory trace mode must be stopped.
ras_control(rasb_eth, RASCT_SET_MEMTRC_SUSPEND, 0, 0); /* might need to be serialized */
ras_unregister(rasb_eth);