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

[John Baldwin]

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