Re: 2.6.29-rc3: tg3 dead after resume

Rafael J. Wysocki
2009-01-31T18:52:12Z

On Saturday 31 January 2009, Parag Warudkar wrote:
>
> On Fri, 30 Jan 2009, Linus Torvalds wrote:
>
> > If you can try the patch I just sent out, and use that as a base for
> > trying to track down why the heck the legacy code doesn't work, that would
> > be great. It might fix it (assuming my guess about "restore_state while in
> > PCI_D3 doesn't work" was correct), but quite frankly, it's equally
> > possible that it just makes things worse. But it would be really
> > interesting to hear..
>
> Sure - will do.
>
> >
> > Your machine does seem to be interesting, in that not only does it have a
> > PCI-E bridge in it (the eeepc I was playing around with at LCA does not),
> > but judging by the lost config state I also suspect that it actually loses
> > power during STR.
>
> Not sure what the significance of eeepc is in this case - mine being a
> standard Intel 5400 chipset I would have thought that's the last
> place to look for interesting things!
>
> > Which is not at all necessarily a given - I suspect it depends on just how
> > the power rails are set up on the motherboard. The fact that PCI-E bridges
> > have apparently worked for others implies that your problems don't happen
> > for everybody, and may relate to that issue.
>
> Do we know this for sure that PCI-E bridges + Suspend have worked for
> others - In this thread at least I think people reported tg3 worked but not
> necessarily with a PCI-E bridge.

Technically, they are PCIe root ports and many systems have network adapters
connected through them (I have two such systems here, but none of them with
tg3-compatible hardware - my tg3 is a PCI device).

Thanks,
Rafael