cvs commit: src/sys/dev/acpica acpi_pci_link.c

Ruslan Ermilov ru at
Tue Nov 22 14:39:29 GMT 2005

On Mon, Nov 21, 2005 at 10:01:16PM +0000, John Baldwin wrote:
> jhb         2005-11-21 22:01:16 UTC
>   FreeBSD src repository
>   Modified files:
>     sys/dev/acpica       acpi_pci_link.c 
>   Log:
>   Fix the code to look up the BIOS IRQ for a given link device by reading
>   the IRQ set by the BIOS in existing devices to actually get the correct
>   bus number of the child PCI bus.  I was not reading the bus number from
>   the bridge device correctly.  The __BUS_ACCESSOR() macros (from which
>   pcib_get_bus() is built) assume that the passed in argument is a child
>   device.  However, at the time I'm reading the bus there is no child
>   device yet, so I was passing in the pcib device as the child device.
>   The parent of the pcib device probably returned an error in the case of
>   a host bridge, thus resulting in random stack garbage for the bus number.
>   For PCI-PCI bridges, the bus number being used was actually the subvendor
>   of the PCI-PCI bridge device itself.
>   MFC after:      1 week
>   Revision  Changes    Path
>   1.49      +15 -3     src/sys/dev/acpica/acpi_pci_link.c
Looks like I no longer need these[A-D].irq=11
in /boot/loader.conf after this change.

Ruslan Ermilov
ru at
FreeBSD committer
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