From ac12259f2984d96454affc147f9d63f2ac2ac1f8 Mon Sep 17 00:00:00 2001 From: Giancarlo Formicuccia Date: Thu, 28 Jul 2005 01:07:33 -0700 Subject: [PATCH] [PATCH] Fix incorrect Asus k7m irq router detection 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. Signed-off-by: Giancarlo Formicuccia Cc: Dave Jones Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/pci/irq.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/i386/pci/irq.c b/arch/i386/pci/irq.c index 766b104ac1a1..d291fb7f1357 100644 --- a/arch/i386/pci/irq.c +++ b/arch/i386/pci/irq.c @@ -550,6 +550,13 @@ static __init int intel_router_probe(struct irq_router *r, struct pci_dev *route 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: -- 2.30.2