Commit 750deaa4 authored by aleksey_gorelov@phoenix.com's avatar aleksey_gorelov@phoenix.com Committed by Linus Torvalds
Browse files

[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: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 434440a2

arch/i386/pci/irq.c

+36 −19
Original line number Diff line number Diff line
@@ -547,18 +547,34 @@ static __init int intel_router_probe(struct irq_router *r, struct pci_dev *route 
	return 0;

}



static __init int via_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)

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 */

	/*

	 * work arounds for some buggy BIOSes

	 */

	if (device == PCI_DEVICE_ID_VIA_82C586_0) {

		switch(router->device) {

		case PCI_DEVICE_ID_VIA_82C686:

			/*

			 * Asus k7m bios wrongly reports 82C686A

			 * as 586-compatible

			 */

			device = PCI_DEVICE_ID_VIA_82C686;

			break;

		case PCI_DEVICE_ID_VIA_8235:

			/**

			 * Asus a7v-x bios wrongly reports 8235

			 * as 586-compatible

			 */

			device = PCI_DEVICE_ID_VIA_8235;

			break;

		}

	}



	switch(device)

	{

	switch(device) {

	case PCI_DEVICE_ID_VIA_82C586_0:

		r->name = "VIA";

		r->get = pirq_via586_get;
@@ -567,6 +583,7 @@ static __init int via_router_probe(struct irq_router *r, struct pci_dev *router, 
	case PCI_DEVICE_ID_VIA_82C596:

	case PCI_DEVICE_ID_VIA_82C686:

	case PCI_DEVICE_ID_VIA_8231:

	case PCI_DEVICE_ID_VIA_8235:

		/* FIXME: add new ones for 8233/5 */

		r->name = "VIA";

		r->get = pirq_via_get;

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