From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paul Brook <paul@codesourcery.com>
Subject: Re: [Qemu-devel] [RFC PATCH 1/5] qdev: Create qdev_get_dev_path()
Date: Tue, 15 Jun 2010 14:19:53 +0100
Message-ID: <201006151419.54215.paul@codesourcery.com>
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Cc: Jan Kiszka <jan.kiszka@siemens.com>,
	"chrisw@redhat.com" <chrisw@redhat.com>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
	Alex Williamson <alex.williamson@redhat.com>,
	"avi@redhat.com" <avi@redhat.com>,
	"kraxel@redhat.com" <kraxel@redhat.com>
To: Markus Armbruster <armbru@redhat.com>
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> > 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