BBB (cpsw(4)) seems to be broken in the latest 11-current

[Paul Mather]

On Jun 20, 2016, at 6:33 PM, Keith White <kwhite at site.uottawa.ca> wrote:

> 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 at freebsd11:/usr/obj/arm.armv6/usr/src/sys/BEAGLEBONE-LOCAL  arm armv6
> 
> ...keith


The patch also fixes the problem for me.

FreeBSD beaglebone 11.0-ALPHA4 FreeBSD 11.0-ALPHA4 #2 r302030M: Tue Jun 21 10:20:59 EDT 2016     pmather at beaglebone:/usr/obj/usr/src/sys/BEAGLEBONE-NO_WITNESS  arm


Cheers,

Paul.