Hi,

    I have found a bug. It is in support of serial cards which uses 
memory for I/O
insted of ports. I made a patch for serial.c and fix one place, but 
probably the
problem like this one could be somewhere else.

    If you try to use setserial with such cards you will get "Address in 
use" (-EADDRINUSE)

Best regards,
                        Kurakin Roman