linux-kernel - Re: [PATCH v2 2/2] can: spi: hi311x: Add Holt HI-311x CAN driver

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Date:   Fri, 17 Mar 2017 09:17:26 +0100
From:   Wolfgang Grandegger <wg@...ndegger.com>
To:     Akshay Bhat <akshay.bhat@...esys.com>,
        Akshay Bhat <nodeax@...il.com>
Cc:     mkl@...gutronix.de, linux-can@...r.kernel.org,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] can: spi: hi311x: Add Holt HI-311x CAN driver

Hello Akshay,

Am 17.03.2017 um 08:39 schrieb Wolfgang Grandegger:
> Hello Akshay,
>
> Am 16.03.2017 um 23:29 schrieb Akshay Bhat:
>> Hi Wolfgang,
>>
>> On 03/16/2017 04:02 PM, Wolfgang Grandegger wrote:
>>>
>>> Looks much better now! There are message for state changes to error
>>> warning and passive. Just the following message is not correct:
>>>
>>>  (000.200824)  can0  20000004   [8]  00 40 00 00 00 00 5F 19
>>> ERRORFRAME
>>>     controller-problem{}
>>>     error-counter-tx-rx{{95}{25}}
>>>
>>> Sorry, forgot to mention... the function can_change_state() [1]
>>> should be used for that purpose, if possible. It fixes the issue
>>> above as well.
>>>
>>
>> The updated driver (the one used to create the above log) is using
>> can_change_state() function. data[1] 40 corresponds to
>> CAN_ERR_CRTL_ACTIVE, so looks correct? Could it be that the can-utils I
>> am using is old and not reporting state change?
>
> Hm, yes. The raw data looks correct. You could download and build a
> recent version from "https://github.com/linux-can/can-utils" to check.
> It could also be a bug.

Support for that flags has been added in December 2014.

Wolfgang-