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authoraleksey_gorelov@phoenix.com <aleksey_gorelov@phoenix.com>2005-10-30 17:59:36 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2005-10-30 20:37:12 -0500
commit750deaa4021da1cf9fdb1e20861a10c76fd7f2bc (patch)
tree662e9c2e22c44e3610d979f7c5e6b1b33bd2dc53 /arch/i386/pci
parent434440a2804639f11858d9d384c9505927feb186 (diff)
[PATCH] asus vt8235 router buggy bios workaround
Hopefully fix http://bugzilla.kernel.org/show_bug.cgi?id=5235 Similar problem has been reported before here: http://groups.google.com/group/linux.kernel/browse_thread/thread/def4ca19dbc3cd4/5cffbf349f2c87a4?tvc=2&q=Aleksey+Gorelov&hl=en#5cffbf349f2c87a4 and was related to bug in BIOS reporting 82C686 router compatible to 586. I suspect BIOS on this board has similar issue: reports VT8235 router to be compatible with 586 one - which is obviously not true. Patch from the link above has already incorporated in both 2.6 & 2.4 series, but might not work in this particular case. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/pci')
-rw-r--r--arch/i386/pci/irq.c55
1 files changed, 36 insertions, 19 deletions
diff --git a/arch/i386/pci/irq.c b/arch/i386/pci/irq.c
index cddafe33ff7c..19e6f4871d1e 100644
--- a/arch/i386/pci/irq.c
+++ b/arch/i386/pci/irq.c
@@ -547,31 +547,48 @@ static __init int intel_router_probe(struct irq_router *r, struct pci_dev *route
547 return 0; 547 return 0;
548} 548}
549 549
550static __init int via_router_probe(struct irq_router *r, struct pci_dev *router, u16 device) 550static __init int via_router_probe(struct irq_router *r,
551 struct pci_dev *router, u16 device)
551{ 552{
552 /* FIXME: We should move some of the quirk fixup stuff here */ 553 /* FIXME: We should move some of the quirk fixup stuff here */
553 554
554 if (router->device == PCI_DEVICE_ID_VIA_82C686 && 555 /*
555 device == PCI_DEVICE_ID_VIA_82C586_0) { 556 * work arounds for some buggy BIOSes
556 /* Asus k7m bios wrongly reports 82C686A as 586-compatible */ 557 */
557 device = PCI_DEVICE_ID_VIA_82C686; 558 if (device == PCI_DEVICE_ID_VIA_82C586_0) {
559 switch(router->device) {
560 case PCI_DEVICE_ID_VIA_82C686:
561 /*
562 * Asus k7m bios wrongly reports 82C686A
563 * as 586-compatible
564 */
565 device = PCI_DEVICE_ID_VIA_82C686;
566 break;
567 case PCI_DEVICE_ID_VIA_8235:
568 /**
569 * Asus a7v-x bios wrongly reports 8235
570 * as 586-compatible
571 */
572 device = PCI_DEVICE_ID_VIA_8235;
573 break;
574 }
558 } 575 }
559 576
560 switch(device) 577 switch(device) {
561 { 578 case PCI_DEVICE_ID_VIA_82C586_0:
562 case PCI_DEVICE_ID_VIA_82C586_0: 579 r->name = "VIA";
563 r->name = "VIA"; 580 r->get = pirq_via586_get;
564 r->get = pirq_via586_get; 581 r->set = pirq_via586_set;
565 r->set = pirq_via586_set; 582 return 1;
566 return 1; 583 case PCI_DEVICE_ID_VIA_82C596:
567 case PCI_DEVICE_ID_VIA_82C596: 584 case PCI_DEVICE_ID_VIA_82C686:
568 case PCI_DEVICE_ID_VIA_82C686: 585 case PCI_DEVICE_ID_VIA_8231:
569 case PCI_DEVICE_ID_VIA_8231: 586 case PCI_DEVICE_ID_VIA_8235:
570 /* FIXME: add new ones for 8233/5 */ 587 /* FIXME: add new ones for 8233/5 */
571 r->name = "VIA"; 588 r->name = "VIA";
572 r->get = pirq_via_get; 589 r->get = pirq_via_get;
573 r->set = pirq_via_set; 590 r->set = pirq_via_set;
574 return 1; 591 return 1;
575 } 592 }
576 return 0; 593 return 0;
577} 594}