Re: [Qemu-devel] [PATCH 1/6] usb: add usb_bus_release function

[Gerd Hoffmann <kraxel@redhat.com>]

  Hi,

> +void usb_bus_release(USBBus *bus)
> +{
> +    assert(next_usb_bus > 0);
> +
> +    next_usb_bus--;
> +    QTAILQ_REMOVE(&busses, bus, next);
> +}

That breaks when not hotplugging in last-in-first-out order.  I'd
suggest to simply leave next_usb_bus alone on unplug.  It is only used
for bus numbering.  We'll get holes in our bus numbering then, but we
can't avoid that with hotplug anyway.

cheers,
  Gerd