CDROM hotplug not supported even with usb bus

[Peter Krempa]

On Thu, Dec 30, 2021 at 11:46:29 +0800, Tianren Zhang wrote:
> Hi,
> 
> I am using libvirt-4.5.0 + qemu-kvm-ev-2.12.0 and I have a question about
> the cdrom function of libvirt. When I tried to attach a CD ROM, it rejected
> the operation showing "cdrom/floppy device hotplug isn't supported". I
> understand that it should be rejected when the IDE bus is used, but the
> hotplug with USB bus is totally feasible, as it's also supported in qemu,
> in this case, should it be allowed for hotplug?

Please see https://gitlab.com/libvirt/libvirt/-/issues/261 for the
explanation. Basically it was not implemented originally when
hotpluggable cdrom types were added.