commit "s390/pci: fix zpci_zdev_put() on reserve" landed as ce2a0d2c8fb5 in impish via upstream stable (it's in Ubuntu-5.13.0-23 and newer), hence all patches needed are included now and the impish entry can be updated to Fix Released.
and
commit "s390/pci: fix zpci_zdev_put() on reserve" landed as 7476a573c040 in hirsute via upstream stable (it's in Ubuntu-5.11.0-42.46 and newer), hence all patches needed are included now and the hirsute entry can be updated to Fix Released.
Meanwhile:
commit "s390/pci: fix zpci_zdev_put() on reserve" landed as ce2a0d2c8fb5 in impish via upstream stable (it's in Ubuntu-5.13.0-23 and newer), hence all patches needed are included now and the impish entry can be updated to Fix Released.
and
commit "s390/pci: fix zpci_zdev_put() on reserve" landed as 7476a573c040 in hirsute via upstream stable (it's in Ubuntu-5.11.0-42.46 and newer), hence all patches needed are included now and the hirsute entry can be updated to Fix Released.
Finally the ticket is closed.