From owner-freebsd-arm@freebsd.org  Fri Jul 31 09:14:26 2015
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Date: Fri, 31 Jul 2015 11:15:50 +0200
From: Hans Petter Selasky <hps@selasky.org>
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Subject: Re: DWC OTG TX path optimisation for 11-current
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Hi,

I did some testing myself and I see the polling handler can loop many 
times when USB is active. Instead of 2 as a polling limit I've set 16. 
Hope this works too. Works fine over here.

https://svnweb.freebsd.org/changeset/base/286118

--HPS