linux-kernel - Re: [PATCH 2/2] sb_edac: Claim a different PCI device

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Date:	Mon, 8 Sep 2014 16:41:31 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	Aristeu Rozanski <aris@...hat.com>,
	Mauro Carvalho Chehab <m.chehab@...sung.com>,
	Doug Thompson <dougthompson@...ssion.com>,
	Borislav Petkov <bp@...en8.de>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	linux-edac@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Rui Wang <ruiv.wang@...il.com>
Subject: Re: [PATCH 2/2] sb_edac: Claim a different PCI device

On Mon, Sep 08, 2014 at 02:49:59PM -0700, Andy Lutomirski wrote:
> On Mon, Sep 8, 2014 at 7:10 AM, Aristeu Rozanski <aris@...hat.com> wrote:
> > On Thu, Aug 14, 2014 at 02:45:41PM -0700, Andy Lutomirski wrote:
> >> sb_edac controls a large number of different PCI functions.  Rather
> >> than registering as a normal PCI driver for all of them, it
> >> registers for just one so that it gets probed and, at probe time, it
> >> looks for all the others.
> >>
> >> Coincidentally, the device it registers for also contains the SMBUS
> >> registers, so the PCI core will refuse to probe both sb_edac and a
> >> future iMC SMBUS driver.  The drivers don't actually conflict, so
> >> just change sb_edac's device table to probe a different device.
> >>
> >> An alternative fix would be to merge the two drivers, but sb_edac
> >> will also refuse to load on non-ECC systems, whereas i2c_imc would
> >> still be useful without ECC.
> >>
> >> The only user-visible change should be that sb_edac appears to bind
> >> a different device.
> >>
> >> Cc: Mauro Carvalho Chehab <m.chehab@...sung.com>
> >> Cc: Rui Wang <ruiv.wang@...il.com>
> >> Signed-off-by: Andy Lutomirski <luto@...capital.net>
> >> ---
> >>  drivers/edac/sb_edac.c | 2 +-
> >>  1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
> >> index a2597e9313c6..e3bc2cced580 100644
> >> --- a/drivers/edac/sb_edac.c
> >> +++ b/drivers/edac/sb_edac.c
> >> @@ -432,7 +432,7 @@ static const struct pci_id_table pci_dev_descr_ibridge_table[] = {
> >>   *   pci_device_id   table for which devices we are looking for
> >>   */
> >>  static const struct pci_device_id sbridge_pci_tbl[] = {
> >> -     {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_TA)},
> >> +     {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SBRIDGE_IMC_HA0)},
> >>       {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IBRIDGE_IMC_HA0_TA)},
> >>       {0,}                    /* 0 terminated list. */
> >>  };
> >
> > Acked-by: Aristeu Rozanski <aris@...hat.com>
> >
> 
> Whose tree will this go through?

Mauro should have a tree for this as he's the subsystem maintainer.

thanks,

greg k-h
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