Hi, Gerd. IMHO, the usb-ehci controller as a common PCI device, likes NIC. If we don't use the multifunction capability of EHCI, we should support to hot plug / unplug Usb-ehci controller. And I think the Bug 879096 is just a bug. Am I right? Thanks.
The patch: http://lists.gnu.org/archive/html/qemu-devel/2012-11/msg03244.html Best regards, -Gonglei