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

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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>
This commit is contained in:
Andi Kleen 2006-04-07 19:49:36 +02:00 committed by Linus Torvalds
parent fa47dd0ba3
commit ec0f08eeea
1 changed files with 5 additions and 0 deletions
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5
arch/i386/pci/direct.c
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@ -4,6 +4,7 @@
#include <linux/pci.h> #include <linux/pci.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/dmi.h>
#include "pci.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) if (pci_probe & PCI_NO_CHECKS)
return 1; 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++) { for (devfn = 0; devfn < 0x100; devfn++) {
if (o->read(0, 0, devfn, PCI_CLASS_DEVICE, 2, &x)) if (o->read(0, 0, devfn, PCI_CLASS_DEVICE, 2, &x))