linux-kernel - Re: [PATCH v1 2/7] iio: adc: ina2xx: Clarify size requirement for data buffer

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Date:   Sun, 17 Dec 2017 09:44:30 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Stefan Brüns <stefan.bruens@...h-aachen.de>
Cc:     <linux-iio@...r.kernel.org>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Maciej Purski <m.purski@...sung.com>,
        <linux-kernel@...r.kernel.org>, "Andrew F . Davis" <afd@...com>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Hartmut Knaack <knaack.h@....de>,
        "Javier Martinez Canillas" <javier@....samsung.com>
Subject: Re: [PATCH v1 2/7] iio: adc: ina2xx: Clarify size requirement for
 data buffer

On Fri, 8 Dec 2017 18:41:47 +0100
Stefan Brüns <stefan.bruens@...h-aachen.de> wrote:

> The timestamp is inserted into the buffer after the sample data by
> iio_push_to_buffers_with_timestamp, document the space requirement for
> the timestamp.
> 
> Signed-off-by: Stefan Brüns <stefan.bruens@...h-aachen.de>
Applied and pushed out as testing for the autobuilders to play with it.
Thanks,

Jonathan
> ---
> 
>  drivers/iio/adc/ina2xx-adc.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
> index 3195f8754c3b..8c8120406f52 100644
> --- a/drivers/iio/adc/ina2xx-adc.c
> +++ b/drivers/iio/adc/ina2xx-adc.c
> @@ -700,7 +700,8 @@ static const struct iio_chan_spec ina219_channels[] = {
>  static int ina2xx_work_buffer(struct iio_dev *indio_dev)
>  {
>  	struct ina2xx_chip_info *chip = iio_priv(indio_dev);
> -	unsigned short data[8];
> +	/* data buffer needs space for channel data and timestap */
> +	unsigned short data[4 + sizeof(s64)/sizeof(short)];
>  	int bit, ret, i = 0;
>  	s64 time_a, time_b;
>  	unsigned int alert;