linux-kernel - Re: [PATCH 13/19] staging: iio: isl29028: move failure logging into isl29028_set_proxim

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Message-ID: <b06942c2-623e-49a4-811d-be292c743725@kernel.org>
Date:   Sun, 4 Dec 2016 11:50:05 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Brian Masney <masneyb@...tation.org>, linux-iio@...r.kernel.org
Cc:     gregkh@...uxfoundation.org, devel@...verdev.osuosl.org,
        knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
        linux-kernel@...r.kernel.org, ldewangan@...dia.com
Subject: Re: [PATCH 13/19] staging: iio: isl29028: move failure logging into
 isl29028_set_proxim_sampling()

On 04/12/16 02:19, Brian Masney wrote:
> When isl29028_set_proxim_sampling() fails, it was up to both callers to
> log the failure message. This patch moves the logging into
> isl29028_set_proxim_sampling() to reduce the overall amount of code in
> the driver.
> 
> Signed-off-by: Brian Masney <masneyb@...tation.org>
Minor point inline.
> ---
>  drivers/staging/iio/light/isl29028.c | 28 ++++++++++++++--------------
>  1 file changed, 14 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/staging/iio/light/isl29028.c b/drivers/staging/iio/light/isl29028.c
> index 23a4db8..0c8a878 100644
> --- a/drivers/staging/iio/light/isl29028.c
> +++ b/drivers/staging/iio/light/isl29028.c
> @@ -79,18 +79,28 @@ struct isl29028_chip {
>  static int isl29028_set_proxim_sampling(struct isl29028_chip *chip,
>  					unsigned int sampling)
>  {
> +	struct device *dev = regmap_get_device(chip->regmap);
>  	static unsigned int prox_period[] = {800, 400, 200, 100, 75, 50, 12, 0};
>  	unsigned int sel;
>  	unsigned int period = DIV_ROUND_UP(1000, sampling);
> +	int ret;
>  
>  	for (sel = 0; sel < ARRAY_SIZE(prox_period); ++sel) {
>  		if (period >= prox_period[sel])
>  			break;
>  	}
>  
> -	return regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
> -				  ISL29028_CONF_PROX_SLP_MASK,
> -				  sel << ISL29028_CONF_PROX_SLP_SH);
> +	ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE,
> +				 ISL29028_CONF_PROX_SLP_MASK,
> +				 sel << ISL29028_CONF_PROX_SLP_SH);
> +	if (ret < 0)
> +		dev_err(dev,
> +			"%s(): Error %d setting the proximity sampling\n",
> +			__func__, ret);
I'd prefer the cleaner style or a return inside this if statement and dropping the
else.
> +	else
> +		chip->prox_sampling = sampling;
> +
> +	return ret;
>  }
>  
>  static int isl29028_enable_proximity(struct isl29028_chip *chip)
> @@ -296,14 +306,6 @@ static int isl29028_write_raw(struct iio_dev *indio_dev,
>  		}
>  
>  		ret = isl29028_set_proxim_sampling(chip, val);
> -		if (ret < 0) {
> -			dev_err(dev,
> -				"Setting proximity samp_freq fail, err %d\n",
> -				ret);
> -			break;
> -		}
> -
> -		chip->prox_sampling = val;
>  		break;
>  	case IIO_LIGHT:
>  		if (mask != IIO_CHAN_INFO_SCALE) {
> @@ -452,10 +454,8 @@ static int isl29028_chip_init_and_power_on(struct isl29028_chip *chip)
>  	}
>  
>  	ret = isl29028_set_proxim_sampling(chip, chip->prox_sampling);
> -	if (ret < 0) {
> -		dev_err(dev, "setting the proximity, err = %d\n", ret);
> +	if (ret < 0)
>  		return ret;
> -	}
>  
>  	ret = isl29028_set_als_scale(chip, chip->lux_scale);
>  	if (ret < 0)
>