netdev - Re: Help testing for USB ethernet/xHCI regression

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Date:	Thu, 30 Jan 2014 21:32:49 -0500
From:	Mark Lord <mlord@...ox.com>
To:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>
CC:	Paul Zimmerman <paulz@...opsys.com>,
	David Laight <David.Laight@...LAB.COM>,
	"renevant@...ernode.on.net" <renevant@...ernode.on.net>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: Help testing for USB ethernet/xHCI regression

On 14-01-30 06:26 PM, Sarah Sharp wrote:
> On Thu, Jan 30, 2014 at 05:20:40PM -0500, Mark Lord wrote:
>> On 14-01-30 04:41 PM, Sarah Sharp wrote:
>>>
>>> Mark and David, can you pull the 3.13-td-changes-reverted branch again,
>>> and see if the latest patch fixes your issue?  It disables scatter
>>> gather for the ax88179_178a device, but only when it's operating at USB
>>> 3.0 speeds.
>>
>> As expected, this works just fine.
> 
> Did it work when plugged into a USB 2.0 hub?

Curiosity, NO.  Dies almost immediately when run at USB 2.0 Hi-Speed.
With a USB 2.0 hub, with a USB 2.0 port on a USB 3.0 hub,
and with a USB 2.0 extension cable in place of a hub.

Near instant hangs.

Plugged directly to the USB 3.0 port, it works fine.
-- 
Mark Lord
Real-Time Remedies Inc.
mlord@...ox.com
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