[Linux-stm32] [PATCH net] net: stmmac: allow a tc-taprio base-time of zero

[Ahmad Fatoum]

Hello Vladimir, Kurt,

On 09.11.21 11:35, Vladimir Oltean wrote:
> On Tue, Nov 09, 2021 at 09:20:53AM +0100, Kurt Kanzenbach wrote:
>> Hi Vladimir,
>>
>> On Mon Nov 08 2021, Vladimir Oltean wrote:
>>> Commit fe28c53ed71d ("net: stmmac: fix taprio configuration when
>>> base_time is in the past") allowed some base time values in the past,
>>> but apparently not all, the base-time value of 0 (Jan 1st 1970) is still
>>> explicitly denied by the driver.
>>>
>>> Remove the bogus check.
>>>
>>> Fixes: b60189e0392f ("net: stmmac: Integrate EST with TAPRIO scheduler API")
>>> Signed-off-by: Vladimir Oltean <vladimir.oltean at nxp.com>
>>
>> I've experienced the same problem and wanted to send a patch for
>> it. Thanks!
>>
>> Reviewed-by: Kurt Kanzenbach <kurt at linutronix.de>
> 
> Cool. So you had that patch queued up? What other stmmac patches do you
> have queued up? :) Do you have a fix for the driver setting the PTP time
> every time when SIOCSHWTSTAMP is called? This breaks the UTC-to-TAI
> offset established by phc2sys and it takes a few seconds to readjust,
> which is very annoying.

Sounds like the same issue in:
https://lore.kernel.org/netdev/20201216113239.2980816-1-h.assmann@pengutronix.de/

Cheers,
Ahmad

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