Commit ec0f08ee authored Apr 07, 2006 by Andi Kleen Committed by Linus Torvalds Apr 09, 2006

[PATCH] x86_64: Don't sanity check Type 1 PCI bus access on newer systems

Horus systems don't have anything on bus 0 which makes
the Type 1 sanity checks fail.  Use the DMI BIOS year to
check for newer systems and always assume Type 1 works on them.
I used 2001 as an pretty arbitary cutoff year.

Cc: gregkh@suse.de
Cc: Navin Boppuri <navin.boppuri@newisys.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent fa47dd0b

arch/i386/pci/direct.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -4,6 +4,7 @@

		#include <linux/pci.h>
		#include <linux/init.h>
		#include <linux/dmi.h>
		#include "pci.h"

		/*
		@@ -188,6 +189,10 @@ static int __init pci_sanity_check(struct pci_raw_ops *o)

		if (pci_probe & PCI_NO_CHECKS)
		return 1;
		/* Assume Type 1 works for newer systems.
		This handles machines that don't have anything on PCI Bus 0. */
		if (dmi_get_year(DMI_BIOS_DATE) >= 2001)
		return 1;

		for (devfn = 0; devfn < 0x100; devfn++) {
		if (o->read(0, 0, devfn, PCI_CLASS_DEVICE, 2, &x))