From owner-freebsd-usb@FreeBSD.ORG  Tue Jul 26 17:19:35 2011
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From: Hans Petter Selasky <hselasky@c2i.net>
To: Peer Stritzinger <peerst@gmail.com>
Date: Tue, 26 Jul 2011 19:17:12 +0200
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Cc: freebsd-usb <freebsd-usb@freebsd.org>
Subject: Re: Powercycling USB device on hub
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On Tuesday 26 July 2011 19:11:31 Peer Stritzinger wrote:
> On Sat, Jul 23, 2011 at 11:47 PM, Hans Petter Selasky <hselasky@c2i.net> 
wrote:
> > On Saturday 23 July 2011 18:53:46 Peer Stritzinger wrote:
> > 
> > In newer libusb there is a function to get the parent HUB address.
> 
> Ah great, I've to update the production systems soon.
> 
> Is it already in 8 stable?
> 
> -- Peer

Yes, see man libusb.