cvs commit: src/sys/dev/pci pci.c

[John Baldwin]

jhb         2008-02-01 20:31:09 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/pci          pci.c 
  Log:
  Relax the check for a PCI-express chipset by assuming the system is a
  PCI-express chipset (and thus has functional MSI) if there are any
  PCI-express devices in the system, not requiring a root port device.
  
  With PCI-X the chipset detection has to be very conservative because there
  are known systems with PCI-X devices that do not appear to have PCI-X
  chipsets.  However, with PCI-express I'm not sure it is possible to have
  a PCI-express device in a system with a non-PCI-express chipset.  If we
  assume that is the case then this change is valid.  It is also required
  for at least some PCI-express systems that don't have any devices with
  a root port capability (some ICH9 systems).
  
  MFC after:      1 week
  Reported by:    jfv
  
  Revision  Changes    Path
  1.357     +2 -5      src/sys/dev/pci/pci.c