linux-kernel - Re: [PATCH] i2c: taos-evm: replace simple

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Message-ID: <20151112074643.GB24008@pengutronix.de>
Date:	Thu, 12 Nov 2015 08:46:43 +0100
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	LABBE Corentin <clabbe.montjoie@...il.com>
Cc:	jdelvare@...e.com, wsa@...-dreams.de, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i2c: taos-evm: replace simple_strtoul by kstrtou8

On Thu, Nov 12, 2015 at 08:26:33AM +0100, LABBE Corentin wrote:
> The simple_strtoul function is marked as obsolete.
> This patch replace it by kstrtou8.
> 
> Signed-off-by: LABBE Corentin <clabbe.montjoie@...il.com>
> ---
>  drivers/i2c/busses/i2c-taos-evm.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/i2c/busses/i2c-taos-evm.c b/drivers/i2c/busses/i2c-taos-evm.c
> index 4c7fc2d..fe2b705 100644
> --- a/drivers/i2c/busses/i2c-taos-evm.c
> +++ b/drivers/i2c/busses/i2c-taos-evm.c
> @@ -70,6 +70,7 @@ static int taos_smbus_xfer(struct i2c_adapter *adapter, u16 addr,
>  	struct serio *serio = adapter->algo_data;
>  	struct taos_data *taos = serio_get_drvdata(serio);
>  	char *p;
> +	int err;
>  
>  	/* Encode our transaction. "@" is for the device address, "$" for the
>  	   SMBus command and "#" for the data. */
> @@ -130,7 +131,9 @@ static int taos_smbus_xfer(struct i2c_adapter *adapter, u16 addr,
>  			return 0;
>  	} else {
>  		if (p[0] == 'x') {
> -			data->byte = simple_strtol(p + 1, NULL, 16);
> +			err = kstrtou8(p + 1, 16, &data->byte);
> +			if (err)
> +				return -EPROTO;
>  			return 0;

This is nearly equivalent to the probably more correct:

	return kstrtou8(p + 1, 16, &data->byte);

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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