Re: [PATCH] ide: Fix ata_id_has_dword_io to return DWORD I/O support properly

Robert Hancock
2008-12-20T02:00:20Z

Alan Cox wrote:
>> This seems like a risky assumption...
>
> Its wrong on various counts
>
> - ata_id_major_version can't tell early ATA versions apart
> - on anything later than the early ISA IDE paddles (the ones that
> basically were just bus decoders) its invisible to the drive
>
> Except for legacy ISA bus controllers (and even there it is questionable)
> I would favour simply ignoring it.

32-bit IO wouldn't work on any ISA controller, would it? What happens if
you do 32-bit IO port access on something on the ISA bus?