Questions about ioport-assignments
linux at dominikbrodowski.net
Fri Apr 16 14:44:33 EDT 2010
On Fri, Apr 16, 2010 at 10:21:35PM +0900, Komuro wrote:
> > 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.
That's not pcmcia_common_align()s fault -- but this line in alloc_io_space:
align = (*base) ? (lines ? 1<<lines : 0) : 1;
Should we try replacing it with
align = lines ? 1 << lines : 0;
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