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


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 

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