5.4: pci_link problem on 440BX

[John Baldwin]

On Friday 13 May 2005 10:02 am, Eugene Grosbein wrote:
> John Baldwin <jhb at FreeBSD.org> wrote:
> > We shouldn't print that message unless pci_link is enabled.  When
> > pci_link is disabled we shouldn't even be looking at PRT entries.  Can
> > you try booting a 6.0-snapshot CD and seeing if it works ok?
>
> Now 6.0 boots to multiuser mode with ACPI fully enabled or fully disabled.
> make buildworld cannot be completed with ACPI - still silent hang
> of userland and no console switching (keyboard leds do switch and
> KDB works).
>
> 6.0's GENERIC does not boot to single user with
> debug.acpi.disabled="pci_link", fatal trap 12 occures: page fault while in
> kernel mode,
> fault virtual address 0x0, supervisor read, page not present
> in acpi_pci_link_lookup+0x26.

I think I know what this is and this patch probably fixes the panic in the
case that you use 'debug.acpi.disabled="pci_link"'

--- //depot/vendor/freebsd/src/sys/dev/acpica/acpi_pci_link.c   2005/11/23 16:40:40
+++ //depot/user/jhb/acpipci/dev/acpica/acpi_pci_link.c 2005/12/02 22:28:08
@@ -1011,6 +1011,9 @@
 {
        struct link *link;

+       if (acpi_disabled("pci_link"))
+               return (PCI_INVALID_IRQ);
+
        ACPI_SERIAL_BEGIN(pci_link);
        link = acpi_pci_link_lookup(dev, index);
        if (link == NULL)

How does the 6.0 install CD do on your machine both with ACPI enabled and disabled?

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org