linux-kernel - Re: [PATCH v5 3/7] PCI: Use pci_walk_bus to detect unassigned resources

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Message-ID: <1372196295.3944.221.camel@pasglop>
Date:	Wed, 26 Jun 2013 07:38:15 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	Yinghai Lu <yinghai@...nel.org>,
	Gavin Shan <shangw@...ux.vnet.ibm.com>,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 3/7] PCI: Use pci_walk_bus to detect unassigned
 resources

On Tue, 2013-06-25 at 15:15 -0600, Bjorn Helgaas wrote:
> -     for_each_pci_dev(dev) {
> > -             int i;
> > +             /* Not assigned, or rejected by kernel ? */
> > +             if (r->flags && !r->start) {
> > +                     (*unassigned)++;
> > +                     return 1; /* return early from pci_walk_bus */
> > +             }
> > +     }

BTW. I'm aware you didn't change that logic but ... it's somewhat broken
in the case where the aperture has an offset. You should compare
r->start with the offset, not with 0.

Cheers,
Ben.


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