Comment 20 for bug 1941005

Reviewed: https://review.opendev.org/c/openstack/nova/+/853270
Committed: https://opendev.org/openstack/nova/commit/696d27a0e2ccf0916fc6bd3eabf73f2b007e7830
Submitter: "Zuul (22348)"
Branch: stable/xena

commit 696d27a0e2ccf0916fc6bd3eabf73f2b007e7830
Author: Balazs Gibizer <email address hidden>
Date: Sat Aug 6 16:09:54 2022 +0200

    Update RequestSpec.pci_request for resize

    Nova uses the RequestSpec.pci_request in the PciPassthroughFilter to
    decide if the PCI devicesm, requested via the pci_alias in the flavor
    extra_spec, are available on a potential target host. During resize the
    new flavor might contain different pci_alias request than the old flavor
    of the instance. In this case Nova should use the pci_alias from the new
    flavor to scheduler the destination host of the resize. However this
    logic was missing and Nova used the old pci_request value based on the
    old flavor. This patch adds the missing logic.

    Closes-Bug: #1983753
    Closes-Bug: #1941005
    Change-Id: I73c9ae27e9c42ee211a53bed3d849650b65f08be
    (cherry picked from commit a93092e0d5c1483f9ad48276708ee35c54ce44fe)
    (cherry picked from commit b6c7ee07ad2a6503b8aad0921cca70e61e60259d)