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Date: Sun, 21 Jun 2015 01:48:35 +0200
From: Hans Petter Selasky <hps@selasky.org>
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To: ticso@cicely.de, Adrian Chadd <adrian@freebsd.org>
CC: Bernd Walter <ticso@cicely7.cicely.de>, 
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 Ian Lepore <ian@freebsd.org>
Subject: Re: also USB problems
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On 06/20/15 20:52, Bernd Walter wrote:
> On Sat, Jun 20, 2015 at 08:26:56PM +0200, Bernd Walter wrote:
>> On Sat, Jun 20, 2015 at 07:45:09PM +0200, Bernd Walter wrote:
>>> On Sat, Jun 20, 2015 at 01:21:24PM -0400, Adrian Chadd wrote:
>>>> Hi,
>>>>
>>>> You typically need an external power supply to drive high current
>>>> things from these devices.
>>>>
>>>> Try connecting them via a powered hub and see what happens.
>>>
>>> Will try, but doubt it will make a difference.
>>> The memory stick isn't what I expect to be high current and I already
>>> tried a self powered hub with the AR93331 devices.
>

Can you kdb_backtrace() on that request having length above 64K, and see 
what is causing it? It needs to be split into multiple of maxio sized 
requests.

--HPS