linux-kernel - Re: [PATCH v2 07/17] iio: accel: mma9553: check for error in reading initial activity and stepcnt

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Date:	Sun, 26 Apr 2015 19:47:18 +0100
From:	Jonathan Cameron <jic23@...nel.org>
To:	Irina Tirdea <irina.tirdea@...el.com>, linux-iio@...r.kernel.org,
	Hartmut Knaack <knaack.h@....de>
CC:	linux-kernel@...r.kernel.org, Vlad Dogaru <vlad.dogaru@...el.com>
Subject: Re: [PATCH v2 07/17] iio: accel: mma9553: check for error in reading
 initial activity and stepcnt

On 13/04/15 16:40, Irina Tirdea wrote:
> When configuring gpio, we need to read initial values for activity and
> step count. This function may fail due to i2c read errors.
> 
> Check the error code returned by mma9553_read_activity_stepcnt
> and return the appropriate error in gpio config function.
> 
> Signed-off-by: Irina Tirdea <irina.tirdea@...el.com>
> Reported-by: Hartmut Knaack <knaack.h@....de>
applied, togreg....
> ---
>  drivers/iio/accel/mma9553.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/iio/accel/mma9553.c b/drivers/iio/accel/mma9553.c
> index 365a109..6f0a14b 100644
> --- a/drivers/iio/accel/mma9553.c
> +++ b/drivers/iio/accel/mma9553.c
> @@ -363,9 +363,12 @@ static int mma9553_conf_gpio(struct mma9553_data *data)
>  		return 0;
>  
>  	/* Save initial values for activity and stepcnt */
> -	if (activity_enabled || ev_step_detect->enabled)
> -		mma9553_read_activity_stepcnt(data, &data->activity,
> -					      &data->stepcnt);
> +	if (activity_enabled || ev_step_detect->enabled) {
> +		ret = mma9553_read_activity_stepcnt(data, &data->activity,
> +						    &data->stepcnt);
> +		if (ret < 0)
> +			return ret;
> +	}
>  
>  	ret = mma9551_gpio_config(data->client,
>  				  MMA9553_DEFAULT_GPIO_PIN,
> 

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