Re: [PATCH v2] hwmon: (gpio-fan) fix pm_runtime imbalance for alarm-only fans

[Guenter Roeck <linux@roeck-us.net>]

On 8/30/26 08:05, Cong Nguyen wrote:
> pm_runtime_enable() runs unconditionally in probe, but the devm cleanup
> that calls pm_runtime_disable() is only registered when control GPIOs
> are present. Alarm-only fans never get it, so unbind warns about the
> missing disable.
> 
> Switch to devm_pm_runtime_enable(), registered before gpio_fan_stop()'s
> devm action so LIFO teardown runs gpio_fan_stop() first. gpio_fan_stop()
> calls set_fan_speed(0) -> pm_runtime_put_sync(), which needs PM still
> enabled to reach gpio_fan_runtime_suspend() and turn the regulator off;
> registering enable after gpio_fan_stop() (as v1 did) reverses that order
> and leaves the regulator on.
> 
> Fixes: 0d01110e6356 ("hwmon: (gpio-fan) Add regulator support")
> Reported-by: Guenter Roeck <linux@roeck-us.net>
> Link: https://lore.kernel.org/r/b9792be3-fcd6-468c-9149-7e33640ee167@roeck-us.net
> Cc: stable@vger.kernel.org
> Assisted-by: Claude:claude-opus-4
> Signed-off-by: Cong Nguyen <congnt264@gmail.com>
> ---

Another instance of a new patch version sent as reply to a previous
version.

It is against guidance in Documentation/process/submitting-patches.rst,
yet it proliferates, and more and more people send new patch revisions
this way. Where is this suggested ?

Thanks,
Guenter