> On Tue, Sep 08, 1998 at 12:39:44AM -0400, Gregory Maxwell wrote:
>
> > I'm worried that alot of people will have hardware compatibility
> > probs with 2.2. Consider the VIA dma bug, how many more like that
> > are there, they we just havn't notices because no one with the
> > nessassary weird hardware combo to bright it out is running 2.1?
>
> Linux makes marginal hardware break... I've got hardware that works
> 100% under NT, but under Linux, bad things happen.
>
> Some of this breakage has acceptable work-arounds, and if these
> devices are know, when can black list them.
>
> I didn't follow the VIA thread, but I suspect we can black-list DMA
> for VIA chipsets.
>
No you may not do a generic blacklist.
For VIA hardware that is robust (ie VP3) (U)DMA is fully function all.
The VP2 has a reported incomplete UDMA standard, but straight DMA mode 2
is functional.
As I have suggested else where, we may need to consider doing a split
enable/disable of UDMA and DMA on a case by case basis. This is
ugly and painful, but less than a wholesale disable.
Regards,
Andre Hedrick
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