linux-kernel - Re: [PATCH 6/7] iio: light: stk3310: simplify code in write_event

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Message-ID: <20241026133039.10742c75@jic23-huawei>
Date: Sat, 26 Oct 2024 13:30:39 +0100
From: Jonathan Cameron <jic23@...nel.org>
To: Julien Stephan <jstephan@...libre.com>
Cc: Mudit Sharma <muditsharma.info@...il.com>, Lars-Peter Clausen
 <lars@...afoo.de>, Anshul Dalal <anshulusr@...il.com>, Javier Carrasco
 <javier.carrasco.cruz@...il.com>, Jean-Baptiste Maneyrol
 <jean-baptiste.maneyrol@....com>, Michael Hennerich
 <Michael.Hennerich@...log.com>, Cosmin Tanislav
 <cosmin.tanislav@...log.com>, Ramona Gradinariu
 <ramona.gradinariu@...log.com>, Antoniu Miclaus
 <antoniu.miclaus@...log.com>, Dan Robertson <dan@...obertson.com>, Marcelo
 Schmitt <marcelo.schmitt@...log.com>, Matteo Martelli
 <matteomartelli3@...il.com>, Anand Ashok Dumbre
 <anand.ashok.dumbre@...inx.com>, Michal Simek <michal.simek@....com>,
 Mariel Tinaco <Mariel.Tinaco@...log.com>, Jagath Jog J
 <jagathjog1996@...il.com>, Lorenzo Bianconi <lorenzo@...nel.org>, Subhajit
 Ghosh <subhajit.ghosh@...aklogic.com>, Kevin Tsai <ktsai@...ellamicro.com>,
 Linus Walleij <linus.walleij@...aro.org>, Benson Leung
 <bleung@...omium.org>, Guenter Roeck <groeck@...omium.org>,
 linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, chrome-platform@...ts.linux.dev
Subject: Re: [PATCH 6/7] iio: light: stk3310: simplify code in
 write_event_config callback

On Thu, 24 Oct 2024 11:11:28 +0200
Julien Stephan <jstephan@...libre.com> wrote:

> iio_ev_state_store is actually using kstrtobool to check user
> input, then gives the converted boolean value to the write_event_config
> callback.
> 
> Remove useless code in write_event_config callback.
> 
> Signed-off-by: Julien Stephan <jstephan@...libre.com>
This one is odd.  The field is 1 bit so I've no idea why checking against 7
would ever have made sense.

Applied, but if anyone is familiar with this part I would like more
eyes on that code to see if there is a bug hiding there.

Jonathan

> ---
>  drivers/iio/light/stk3310.c | 3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
> index ed20b67145463d253a0dff28a4c1c3e02e710319..c6f950af5afa0f77a617bd2baf0a08eef5ec26f0 100644
> --- a/drivers/iio/light/stk3310.c
> +++ b/drivers/iio/light/stk3310.c
> @@ -330,9 +330,6 @@ static int stk3310_write_event_config(struct iio_dev *indio_dev,
>  	struct stk3310_data *data = iio_priv(indio_dev);
>  	struct i2c_client *client = data->client;
>  
> -	if (state < 0 || state > 7)
> -		return -EINVAL;
> -
>  	/* Set INT_PS value */
>  	mutex_lock(&data->lock);
>  	ret = regmap_field_write(data->reg_int_ps, state);
>