linux-kernel - Re: [Bug #16161] [2.6.35-rc1 regression] sysfs: cannot create duplicate filename ... XVR-600 related?

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Date:	Fri, 18 Jun 2010 13:43:16 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Brian Bloniarz <bmb@...enacr.com>
Cc:	David Miller <davem@...emloft.net>, rjw@...k.pl, mikpe@...uu.se,
	linux-kernel@...r.kernel.org, kernel-testers@...r.kernel.org,
	maciej.rutecki@...il.com, achiang@...onical.com
Subject: Re: [Bug #16161] [2.6.35-rc1 regression] sysfs: cannot create
 duplicate filename ... XVR-600 related?

On Fri, 18 Jun 2010 16:40:44 -0400
Brian Bloniarz <bmb@...enacr.com> wrote:

> On 06/18/2010 04:26 PM, David Miller wrote:
> > From: Jesse Barnes <jbarnes@...tuousgeek.org>
> > Date: Fri, 18 Jun 2010 13:10:49 -0700
> > 
> >> I reverted the symlink patch that was causing the trouble.  The root
> >> cause is elsewhere though; it seems some firmwares report duplicate PCI
> >> slot numbers...
> > 
> > Instead of postulating, you can confirm or deny such a theory
> > by taking a look at the repository of sparc openfirmware tree
> > dumps maintained at:
> > 
> > 	master.kernel.org:/pub/scm/linux/kernel/git/davem/prtconfs.git
> 
> (Adding Alex Chiang to the cc list)
> 
> I was actually under the impression that it was just an 
> issue with the reverted patch, not an actual problem with
> hardware.

Yeah, I think you're right.  I reverted it at Alex's request and
assumed it was a firmware or configuration problem.  Looking at the
thread again I see that was a bad assumption.

> In the patch, 2 individual code paths were trying to
> create the same symlinks:
> pci-sysfs.c:pci_create_slot_links(struct pci_dev *dev)
> and
> slot.c:create_sysfs_files(struct pci_slot *slot).
> I think some archs managed to call those both during
> initialization, and some not.

Well that would explain it too.  I'm happy to take a fixed up patch if
there's demand.

Thanks,
-- 
Jesse Barnes, Intel Open Source Technology Center
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