[U-Boot] [PATCH] test/py: Detect timeout in phy negotiation

[Stephen Warren <swarren@wwwdotorg.org>]

On 05/17/2016 12:00 PM, Michal Simek wrote:
> On 17.5.2016 19:36, Stephen Warren wrote:
>> On 05/17/2016 11:03 AM, Michal Simek wrote:
>>> On 17.5.2016 19:00, Stephen Warren wrote:
>>>> On 05/17/2016 10:56 AM, Michal Simek wrote:
>>>>> Hi Stephen,
>>>>>
>>>>> On 17.5.2016 18:50, Stephen Warren wrote:
>>>>>> On 05/17/2016 07:57 AM, Michal Simek wrote:
>>>>>>> If timeout happen it should be reported as fault.
>>>>>>
>>>>>> Presumably if a timeout occurs, the expected text does not appear,
>>>>>> i.e.
>>>>>> the existing assert fails anyway?
>>>>>>
>>>>>> Anyway, it's useful to point out problems explicitly, so,
>>>>>> Acked-by: Stephen Warren <swarren@nvidia.com>
>>>>>
>>>>> Unfortunately I found this issue when I was checking logs where I am
>>>>> getting this.
>>>>>
>>>>> ethernet at e000b000 Waiting for PHY auto negotiation to complete.........
>>>>> TIMEOUT !
>>>>> BOOTP broadcast 1
>>>>> BOOTP broadcast 2
>>>>> BOOTP broadcast 3
>>>>> DHCP client bound to address 192.168.0.107 (882 ms)
>>>>> Zynq> .Zynq> setenv serverip 192.168.0.105
>>>>>
>>>>> I haven't looked at the exact reason why it is failing but IMHO it is
>>>>> worth to check.
>>>>
>>>> Oh, in that case I think I should withdraw my ack; in the log above, the
>>>> operation completed successfully, so I'm not convinced the test should
>>>> be marked a failure. I thought this change simply provided more detail
>>>> re: the cause of a test failure.
>>>
>>> Is there any other way how to run just phy negotiation and mark this
>>> test as fail?
>>
>> I don't see anything obvious that will do that; I think that only
>> happens when net_loop starts. It might be possible to add some new
>> command to test just PHY startup, or a new mode for net_loop() that just
>> waited for link up and did no protocol work.
>
> ok. It means you are saying that this is bug and we are not able to test
> it by single test. That's why I think this should be report as a bug
> when this is happening just to hands up there is a problem.
>
> Not sure if there is any way to report is as a warning instead of bug
> that test case will pass with warning.

At least my only-marginally-old version of pytest (2.5.1) doesn't appear 
to have any concept of warnings. Some quite new versions of pytest do, 
although I'm not sure how they're reported. Integrating some form of 
warning system into the tests could be useful though.

I wonder if the correct fix for this issue isn't to make the PHY code 
actively return an error whenever there is a TIMEOUT raised, rather than 
presumably ignoring it as it does now (since the network code goes on to 
actually work correctly)?