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authorGiancarlo Formicuccia <giancarlo.formicuccia@gmail.com>2005-07-28 01:07:33 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-28 08:39:01 -0700
commitac12259f2984d96454affc147f9d63f2ac2ac1f8 (patch)
tree7c020f7c6efbfd57b85043d7af615fe473ea4a42
parentad2b93123d2b3cb4ba9a98dd5f62acb6d6b50391 (diff)
[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 <giancarlo.formicuccia@gmail.com> Cc: Dave Jones <davej@codemonkey.org.uk> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/i386/pci/irq.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/i386/pci/irq.c b/arch/i386/pci/irq.c
index 766b104ac1a..d291fb7f135 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: