Re: [PATCH v2 1/4] can: dev: Consolidate and unify state change handling.

[Andri Yngvason <andri.yngvason@marel.com>]

On þri 21.okt 2014 15:21, Wolfgang Grandegger wrote:
>
>>>>> To see if the state changes occur as expected could you please record
>>>>> error message traces with candump for the following two scenarios:
>>>>>
>>>>> 1. send messages with cangen
>>>>>    disconnect the cable
>>>>>    reconnect the cable after a while until the error active state is
>>>>>    reached.
After cleaning up my mess, this is the output for the disconnected cable test:
 (000.000000)  can1  20000004   [8]  00 08 00 00 00 00 60 00   ERRORFRAME
        controller-problem{tx-error-warning}
        error-counter-tx-rx{{96}{0}}
 (000.003953)  can1  20000004   [8]  00 20 00 00 00 00 80 00   ERRORFRAME
        controller-problem{tx-error-passive}
        error-counter-tx-rx{{128}{0}}
 (005.959170)  can1  20000002   [8]  03 00 00 00 00 00 00 00   ERRORFRAME
        lost-arbitration{at bit 3}
 (000.428328)  can1  20000004   [8]  00 40 00 00 00 00 5F 00   ERRORFRAME
        controller-problem{back-to-error-active}
        error-counter-tx-rx{{95}{0}}

>>>>>>> 2. set restart-ms=100
>>>>>>>    send messages with cangen
>>>>>>>    provoke a bus-off short-circuiting CAN low and high
>>>>>>>    remove the short-circuit
>>>>>>>
Shorting the can bus yields a loop like this:
 (044.014170)  can1  20000004   [8]  00 20 00 00 00 00 88 00   ERRORFRAME
        controller-problem{tx-error-passive}
        error-counter-tx-rx{{136}{0}}
 (000.003175)  can1  20000040   [8]  00 00 00 00 00 00 7F 00   ERRORFRAME
        bus-off
        error-counter-tx-rx{{127}{0}}
 (000.099664)  can1  20000100   [8]  00 00 00 00 00 00 00 00   ERRORFRAME
        restarted-after-bus-off
 (000.097246)  can1  20000004   [8]  00 20 00 00 00 00 88 00   ERRORFRAME
        controller-problem{tx-error-passive}
        error-counter-tx-rx{{136}{0}}
 (000.003160)  can1  20000040   [8]  00 00 00 00 00 00 7F 00   ERRORFRAME
        bus-off
        error-counter-tx-rx{{127}{0}}
 (000.099602)  can1  20000100   [8]  00 00 00 00 00 00 00 00   ERRORFRAME
        restarted-after-bus-off

Cheers,
Andri