The following reply was made to PR usb/156725; it has been noted by GNATS.

From: Hans Petter Selasky <hsela...@c2i.net>
To: freebsd-usb@freebsd.org,
 freebsd-gnats-sub...@freebsd.org
Cc: lini...@freebsd.org,
 freebsd-am...@freebsd.org
Subject: Re: usb/156725: USB stack stall cause complete system input loss
Date: Mon, 2 May 2011 08:28:48 +0200

 On Monday 02 May 2011 02:26:29 lini...@freebsd.org wrote:
 > Synopsis: USB stack stall cause complete system input loss
 > 
 > Responsible-Changed-From-To: freebsd-amd64->freebsd-usb
 > Responsible-Changed-By: linimon
 > Responsible-Changed-When: Mon May 2 00:25:49 UTC 2011
 > Responsible-Changed-Why:
 > reclassify.
 > 
 > http://www.freebsd.org/cgi/query-pr.cgi?pr=156725
 
 Hi,
 
 All attach and detach methods are run from a single thread, the root HUB 
 thread. If any device driver is blocking the detach routine for some reason, 
 other devices on the same USB controller will be prevented from enumerating 
 aswell.
 
 --HPS
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