Re: [PATCH 0/1] Recurse when searching for empty slots in resourcestrees

From: Linus Torvalds
Date: Wed Jun 17 2009 - 12:29:23 EST

On Wed, 17 Jun 2009, Ivan Kokshaysky wrote:

> On Tue, Jun 16, 2009 at 04:32:18PM -0700, Linus Torvalds wrote:
> > > So your patch may fix a bug, but I'm pretty sure I've seen a patch from
> > > Ivan that should _also_ fix it, and that I would expect to do it not by
> > > just tweaking a fundamentally ambiguous case.
> >
> > Hmm. For the life of me, I can't seem to find this patch. Maybe it wasn't
> > Ivan who wrote it after all. Or maybe my google-fu is weak. Or maybe I'm
> > just delusional, and the patch never existed.
> No, it wasn't me.

Ingo pointed out that it was probably Yinghai. And now that I'm googling
for the right author, I found it on the first try. It's this patch

I was thinking of.

But that was before I realized that pci_assign_resource() _already_ always
chose the right parent bus (and it was just that it can't handle
transparent buses at all). I then ended up not understanding how the
incorrect nesting could possibly happen at all. So Yinghai's patch is
irrelevant for this particular problem.


> Anyway, pci_claim_resource() fix suggested by Matthew seems to be
> correct, if the problematic system was indeed ia64 and not x86.

I agree. That one explains why the nesting is wrong, and also why I
couldn't figure out how it happened.

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