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.

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

Best regards,
                       Kurakin Roman