Questions about ioport-assignments

[Komuro]

Hi,

> Wolfram wrote:
> 
> >>- Is it just a buggy card if it works at 0x300 but not 0xc300
> >>  (or is it maybe a problem with Linux assigning the io area)?
> >>- Why is IOAddrLines forced to 16 (and thus alignment to 0x10000), but only
> >>  if BasePort1 is 0?
> 

In this case, 
start = 0xc000, 
align_data->mask = 0x3ff, 
align_data->offset = 0x300
then ret becomes 0xc300;

but ret should be 0x300.

static resource_size_t pcmcia_common_align(struct pcmcia_align_data *align_data,
                                        resource_size_t start)
{
        resource_size_t ret;
        /*
         * Ensure that we have the correct start address
         */
        ret = (start & ~align_data->mask) + align_data->offset;
        if (ret < start)
                ret += align_data->mask + 1;

        return ret;
}

Best Regards
Komuro