qmp, hmp: make subsystem/system-vendor identities optional
According to PCI specification, subsystem id and subsystem vendor id are present only in type 0 and type 2 headers (at different offsets), but not in type 1 headers. Thus we should make this data optional in struct PciDeviceId and skip reporting them via HMP if the information is not available. Additional (wrong information) about PCI bridges (Type1 devices) has been added in 5383a705 and fortunately not released. This patch fixes that problem. The problem was spotted by Markus. Signed-off-by: NDenis V. Lunev <den@openvz.org> CC: "Dr. David Alan Gilbert" <dgilbert@redhat.com> CC: Eric Blake <eblake@redhat.com> CC: Markus Armbruster <armbru@redhat.com> Message-Id: <20181002135538.12113-1-den@openvz.org> Reported-by: NMarkus Armbruster <armbru@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Reviewed-by: NDr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: NMarkus Armbruster <armbru@redhat.com> Signed-off-by: NDr. David Alan Gilbert <dgilbert@redhat.com>
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