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Date:      Sun, 21 Jun 2015 01:48:35 +0200
From:      Hans Petter Selasky <hps@selasky.org>
To:        ticso@cicely.de, Adrian Chadd <adrian@freebsd.org>
Cc:        Bernd Walter <ticso@cicely7.cicely.de>,  "freebsd-mips@freebsd.org" <freebsd-mips@freebsd.org>, Ian Lepore <ian@freebsd.org>
Subject:   Re: also USB problems
Message-ID:  <5585FBD3.2010808@selasky.org>
In-Reply-To: <20150620185211.GF41261@cicely7.cicely.de>
References:  <20150619212042.GE34133@cicely7.cicely.de> <1434749655.1415.105.camel@freebsd.org> <20150619225933.GF34133@cicely7.cicely.de> <CAJ-VmokMs7rW5f5YUEr8=YxgWGJ0E-i8UfE%2BXDVDemJm_GjyqA@mail.gmail.com> <20150620142830.GA41261@cicely7.cicely.de> <CAJ-Vmo=q1HXD1_iguR5RvWwE_HKG_gK5zWQpcjMwxYrgucpBKg@mail.gmail.com> <20150620165536.GB41261@cicely7.cicely.de> <CAJ-Vmo=g%2Bi3vFPG5n9Qro9O_ozKnE3z5FzLhFWmZc5PXRK6nEQ@mail.gmail.com> <20150620174509.GD41261@cicely7.cicely.de> <20150620182656.GE41261@cicely7.cicely.de> <20150620185211.GF41261@cicely7.cicely.de>

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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




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