Re: [hwmon PATCH v2 2/8] hwmon: (adt7470) Fix cache updated before hardware write on I2C error

[Guenter Roeck]

On Mon, Jul 27, 2026 at 09:22:18PM -0300, Luiz Angelo Daros de Luca wrote:
> adt7470_temp_write() and adt7470_pwm_write() update the driver's
> cached values (temp_min, temp_max, pwm_input, pwm_enable) before issuing
> the corresponding regmap_write(), and never check whether the write
> succeeded before committing that update. If the I2C transaction fails,
> the function correctly propagates the error to the caller, but the cache
> silently keeps the new value, which was never actually applied to the
> hardware. Subsequent reads then report a value that does not match the
> device state.
> 
> Reorder both write paths to update the cache only after a successful
> regmap_write(), so the cache always reflects what was actually
> written to the hardware.
> 
> Fixes: ef67959c4253 ("hwmon: (adt7470) Convert to use regmap")
> Signed-off-by: Luiz Angelo Daros de Luca <luizluca@xxxxxxxxx>

Applied.

Thanks,
Guenter