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Date: Mon, 20 Jun 2016 18:33:22 -0400 (EDT)
From: Keith White <kwhite@site.uottawa.ca>
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To: Luiz Otavio O Souza <loos.br@gmail.com>
cc: Maxim Sobolev <sobomax@sippysoft.com>,
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Subject: Re: BBB (cpsw(4)) seems to be broken in the latest 11-current
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On Mon, 20 Jun 2016, Luiz Otavio O Souza wrote:

> On Sun, Jun 19, 2016 at 1:11 AM, Maxim Sobolev wrote:
>> Jim, some update from here. Running r283287 of the driver, I still see the
>> same "watchdog timeout" messages, but they do not lead to the interface
>> lockout. The traffic resumes momentarily. Which is probably why I never paid
>> much attention to those warnings before. Therefore, I suspect that the new
>> MAC code does not deal with watchdog-triggered interface reset as good as
>> the old code. Does it give you any ideas about what could be wrong there by
>> any chance?
>
>
> Hi Maxim,
>
> My recent changes contributed somehow to expose the bug more frequently.
>
> There was a condition in tx packet reclamation where we aren't
> restarting the tx queue in one of the possible stall conditions.
>
> Please try the attached patch and let me know if it works for you.
>
> Luiz

Your patch fixes the problem for me.  Thanks!

FreeBSD beaglebone 11.0-ALPHA4 FreeBSD 11.0-ALPHA4 #0 r302028M: Mon Jun 20 18:19:55 EDT 2016     kwhite@freebsd11:/usr/obj/arm.armv6/usr/src/sys/BEAGLEBONE-LOCAL  arm armv6

...keith