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From: Neil Armstrong <narmstrong@baylibre.com>
To: Guenter Roeck <linux@roeck-us.net>, Artem Lapkin <email2tema@gmail.com>
Cc: wim@linux-watchdog.org, khilman@baylibre.com,
	jbrunet@baylibre.com, christianshewitt@gmail.com,
	martin.blumenstingl@googlemail.com,
	linux-watchdog@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org,
	art@khadas.com, nick@khadas.com, gouwa@khadas.com
Subject: Re: [PATCH v4 3/3] watchdog: meson_gxbb_wdt: remove stop_on_reboot
Date: Fri, 30 Jul 2021 10:20:06 +0200	[thread overview]
Message-ID: <7832d036-3811-544e-8007-fe719bb38ded@baylibre.com> (raw)
In-Reply-To: <20210730045857.GC2110311@roeck-us.net>

Hi Guenter,

On 30/07/2021 06:58, Guenter Roeck wrote:
> On Fri, Jul 30, 2021 at 12:13:55PM +0800, Artem Lapkin wrote:
>> Remove watchdog_stop_on_reboot()
>>
>> Meson platform still have some hardware drivers problems for some
>> configurations which can freeze device on shutdown/reboot stage and i
>> think better to have reboot warranty by default.
>>
>> I feel that it is important to keep the watchdog running during the
>> reboot sequence, in the event that an abnormal driver freezes the reboot
>> process.
>>
>> This is my personal opinion and I hope the driver authors will agree
>> with my proposal, or just ignore this commit if not.
>>
>> https://lore.kernel.org/linux-watchdog/20210729072308.1908904-1-art@khadas.com/T/#t
>>
> 
> A much better description would be something like
> 
> "The Meson platform still has some hardware drivers problems for some
>  configurations which can freeze devices on shutdown/reboot.
>  Remove watchdog_stop_on_reboot() to catch this situation and ensure
>  that the reboot happens anyway.
>  Users who still want to stop the watchdog on reboot can still do so
>  using the watchdog.stop_on_reboot=1 module parameter.
>  "
> 
> That leaves the personal opinion out of the picture and provides both
> a rationale for the change and an alternative for people who want
> to stop the watchdog on reboot anyway.
> 
>> Signed-off-by: Artem Lapkin <art@khadas.com>
> 
> As mentioned, I'd still like to get an opinion from the driver
> author and/or some other users of this platform. However, I'll
> accept the patch with the above description change if I don't get
> additional feedback.

Sorry for the reply delay and thanks a lot for your review.

The rationale from Artem is OK for me.

Please add my Acked-by for the whole patchset.

Neil

> 
> Thanks,
> Guenter
> 
>> ---
>>  drivers/watchdog/meson_gxbb_wdt.c | 1 -
>>  1 file changed, 1 deletion(-)
>>
>> diff --git a/drivers/watchdog/meson_gxbb_wdt.c b/drivers/watchdog/meson_gxbb_wdt.c
>> index 945f5e65db57..d3c9e2f6e63b 100644
>> --- a/drivers/watchdog/meson_gxbb_wdt.c
>> +++ b/drivers/watchdog/meson_gxbb_wdt.c
>> @@ -198,7 +198,6 @@ static int meson_gxbb_wdt_probe(struct platform_device *pdev)
>>  
>>  	meson_gxbb_wdt_set_timeout(&data->wdt_dev, data->wdt_dev.timeout);
>>  
>> -	watchdog_stop_on_reboot(&data->wdt_dev);
>>  	return devm_watchdog_register_device(dev, &data->wdt_dev);
>>  }
>>  
>> -- 
>> 2.25.1
>>


  parent reply	other threads:[~2021-07-30  8:20 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-30  4:13 [PATCH v4 0/3] watchdog: meson_gxbb_wdt: improve Artem Lapkin
2021-07-30  4:13 ` [PATCH v4 1/3] watchdog: meson_gxbb_wdt: add nowayout parameter Artem Lapkin
2021-07-30  4:45   ` Guenter Roeck
2021-11-09  7:59     ` Art Nikpal
2021-07-30  4:13 ` [PATCH v4 2/3] watchdog: meson_gxbb_wdt: add timeout parameter Artem Lapkin
2021-07-30  4:47   ` Guenter Roeck
2021-11-09  7:59   ` Art Nikpal
2021-07-30  4:13 ` [PATCH v4 3/3] watchdog: meson_gxbb_wdt: remove stop_on_reboot Artem Lapkin
2021-07-30  4:58   ` Guenter Roeck
2021-07-30  6:52     ` Art Nikpal
2021-07-30  8:20     ` Neil Armstrong [this message]
2021-11-09  7:59   ` Art Nikpal
2021-11-09 15:30     ` Guenter Roeck
2021-11-10  2:27       ` Art Nikpal
2021-11-09  7:58 ` [PATCH v4 0/3] watchdog: meson_gxbb_wdt: improve Art Nikpal

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