Re: [PATCH] PCI: Add new PCI id for Intel GPU interrupt quirk

[Bjorn Helgaas <bhelgaas@google.com>]

On Fri, Apr 25, 2014 at 11:35:21AM -0600, Bjorn Helgaas wrote:
> [+cc Daniel, Jani, intel-gfx, dri-devel, -cc stable]
> 
> On Mon, Apr 07, 2014 at 03:10:32PM +0200, Thomas Jarosch wrote:
> > After a CPU upgrade while keeping the same mainboard,
> > we faced "spurious interrupt" problems again.
> > 
> > It turned out that the new CPU also featured a
> > new GPU with a different PCI id.
> > 
> > -> Add this PCI id to the quirk table. Probably all other
> > Intel GPU PCI ids are affected, too, but I don't want
> > to add them without a test system.
> 
> Daniel, Jani, et al, do we need a better solution to this?  Is there
> a more general way to solve this than by tripping over affected machines
> one-by-one?  Could this be done in the driver rather than in a quirk?

I guess it can't be done in the driver because the problem happens even if
the driver isn't loaded, per f67fd55fa96f ("PCI: Add quirk for still
enabled interrupts on Intel Sandy Bridge GPUs").

> > Signed-off-by: Thomas Jarosch <thomas.jarosch@intra2net.com>
> > Tested-by: Thomas Jarosch <thomas.jarosch@intra2net.com>
> > ---
> >  drivers/pci/quirks.c | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> > index e729206..0feb4a3 100644
> > --- a/drivers/pci/quirks.c
> > +++ b/drivers/pci/quirks.c
> > @@ -2954,6 +2954,7 @@ static void disable_igfx_irq(struct pci_dev *dev)
> >  }
> >  DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0102, disable_igfx_irq);
> >  DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x010a, disable_igfx_irq);
> > +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x0152, disable_igfx_irq);
> >  
> >  /*
> >   * PCI devices which are on Intel chips can skip the 10ms delay
> > -- 
> > 1.8.1.4
> > 
> > --
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