Re: [PATCH 1/1] pci: Block config access during BIST (resend)

Andi Kleen
2005-01-15T01:51:58Z

On Sat, Jan 15, 2005 at 12:33:08AM +0000, Alan Cox wrote:
> On Iau, 2005-01-13 at 21:50, Andi Kleen wrote:
> > I could see it as a problem when it happens on a bridge, but why
> > should it be a problem when some arbitary, nothing to do with X
> > leaf is temporarily not available?
>
> Because X will believe that PCI address range is free and right now in
> some circumstances older X may want to play with PCI layout itself.

Yuck. sounds as broken as it can be. Hopefully nobody uses
such X servers anymore.

Then it won't work with this BIST hardware anyways - if it tries
to read config space of a device that is currently in BIST
it will just get a bus abort and no useful information.

The only point of this whole patch exercise is to avoid the bus abort
to satisfy the more strict hardware error checking on PPC64. On PCs
it really won't make any difference.

-Andi