Messages in this thread | | | Date | Wed, 27 Jul 2005 12:48:33 -0400 | From | Dave Jones <> | Subject | Re: [PATCH] Fix incorrect Asus k7m irq router detection |
| |
On Wed, Jul 27, 2005 at 10:16:30AM +0200, Giancarlo Formicuccia wrote:
> this patch: > http://marc.theaimsgroup.com/?l=bk-commits-head&m=111955644929114&w=2 > uncovered a k7m bios bug, where the VT82C686A router is reported as > being "586-compatible". The two chips have different pirq mapping, so > this leads to "irq routing conflict" on many pci devices. > > The suggested fix was discussed with Aleksey Gorelov, who helped me > to identify the problem as a probable bios bug. > > Patch for 2.6.13-git4. > > Signed-off-by: Giancarlo Formicuccia <giancarlo.formicuccia@gmail.com> > > --- linux-2.6.13-rc3-git4/arch/i386/pci/irq.c.org 2005-07-27 08:58:05.000000000 +0200 > +++ linux-2.6.13-rc3-git4/arch/i386/pci/irq.c 2005-07-27 08:59:29.000000000 +0200 > @@ -550,6 +550,13 @@ > static __init int via_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) > { > /* FIXME: We should move some of the quirk fixup stuff here */ > + > + if (router->device == PCI_DEVICE_ID_VIA_82C686 && > + device == PCI_DEVICE_ID_VIA_82C586_0) { > + /* Asus k7m bios wrongly reports 82C686A as 586-compatible */ > + device = PCI_DEVICE_ID_VIA_82C686; > + } > + > switch(device) > { > case PCI_DEVICE_ID_VIA_82C586_0:
If this really is a problem with that board, it should have a DMI entry for that board alone, not for every VIA chipset that uses the 586/686 combo, as I'm fairly certain there are some that legitimately use this combination, and the patch above will force them all to be reported as 82C686's.
Dave - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |