Re: [PATCH] hisax/sportster dependency error

[Alan Cox]

> > according to sportster.c:get_io_range, this appears to be perfectly
> > intentional, request_regioning 64x8 byte from 0x268 in 1024byte-steps.
> 
> AFAIK, this is because the hardware is stupid and does decode the higher
> address lines. Therefore, the IO ports are mirrored every 1024 bytes and
> should be reserved to avoid potential conflicts with other devices.

Almost every 10bit decode ISA card is like that. You don't need to do the
work. The PCI alloc rules already cover it.