[PATCH/RFC] PCI Error Recovery

[Benjamin Herrenschmidt]

> 
> e.g. on typical PCI Express chipsets there is no such concept.
> With error reporting there you just get told "one of your 
> previous accesses or DMAs failed", but the device is not
> completely gone.
> 
> IMHO the concept of "slot freeze" is too PPC64 specific to
> be exposed like this. While there are other chipsets
> that do similar things a lot of widely used ones will not.
> 
> Can you reformulate it in terms of "error states" ?
> Just report an error occurred and the device is unreliable.

I don't want to expose it that way neither, but the fact is we can't
just have "generic" states that apply to every architecture. I haven't
yet looked at Linas latest patch though, but at one point, we need to
define a few states that may or may not apply to a given architecture
and give enough info to drivers to deal with them as much as they can.
I'm afraid we can't completely avoid some of the complexity here.

Ben.