Re: [Qemu-devel] [RFC PATCH 1/5] qdev: Create qdev_get_dev_path()

[Paul Brook]

> > Every hotplug-capable bus must have a proper addressing scheme, I think
> > this is a reasonable and achievable requirement. Then we don't need
> > instance numbers for those buses.
> 
> What about USB?

USB has useful device addresses (physical ports).
These aren't used by most of the higher-level protocols (logically USB is a 
flat bus structure), but the physically tree topology is still there if you 
look hard enough.

Paul