Comment 4 for bug 1613434

Reviewed: https://review.openstack.org/363884
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=d38d5767d15b24df455b1844dfe53ada2ebf9751
Submitter: Jenkins
Branch: master

commit d38d5767d15b24df455b1844dfe53ada2ebf9751
Author: Ludovic Beliveau <email address hidden>
Date: Wed Aug 31 14:27:43 2016 -0400

    PCI: Fix PCI with fully qualified address

    Specifying a PF passthrough device in the pci_passthrough_whitelist using its
    fully qualified PCI address (no wildcard) causes the device to not be
    properly loaded. The PCI device is then not available to be assigned to any
    guest.

    In this case, the hypervisor reports the PF device without a 'parent_addr'.
    But in the PciAddress, match() is using it when doing the comparison to its
    own address.

    This commit changes the logic of the address matching method in PciDevSpec to
    only try to match the address with a physical function device when a
    'parent_addr' is reported by the hypervisor.

    Change-Id: I5255240871d8ad5c216500f39520339efe46e84b
    Closes-Bug: #1613434