[SeaBIOS] SeaBIOS recognising USB 3.0 on boot works - partly

[Kevin O'Connor]

On Sat, Dec 19, 2015 at 12:52:15AM +0100, Peter Stuge wrote:
> Kevin O'Connor wrote:
> > > Would checking the connection status for each device after all
> > > devices have been registered be able to filter the USB2 device out?
> > 
> > Yes, but there isn't a way to "unregister" the drive once it's been
> > registered.
> 
> Oh - why not?
> 
> If this has to do with e.g. BBS then maybe first register internally
> during probing, then filter disconnected devices out, *then* register
> "for real" ?

Doing that is equivalent (unless I've missed something) to delaying
registration until detection completes on all other ports on that
controller.  That's the delay I'm leery of adding.

-Kevin