On Mon, 18 Jul 2022 15:07:06 +0200
Jean-Baptiste Maneyrol <jmaneyrol@xxxxxxxxxxxxxx> wrote:
> From: Fawzi Khaber <fawzi.khaber@xxxxxxx>
>
> iio_format_avail_range() should print range as follow [min, step, max], so
> the function was previously calling iio_format_list() with length = 3,
> length variable refers to the array size of values not the number of
> elements. In case of non IIO_VAL_INT values each element has integer part
> and decimal part. With length = 3 this would cause premature end of loop
> and result in printing only one element.
>
> Signed-off-by: Fawzi Khaber <fawzi.khaber@xxxxxxx>
> Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@xxxxxxx>
> Fixes: eda20ba1e25e ("iio: core: Consolidate iio_format_avail_{list,range}()")
As I'm hoping to sneak in a late pull request for the coming merge window
(as the cycle has been delayed), I've picked this on up on the togreg branch of iio.git.
+ marked for stable.
Thanks,
Jonathan
> ---
> drivers/iio/industrialio-core.c | 18 +++++++++++++++++-
> 1 file changed, 17 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
> index 358b909298c0..0f4dbda3b9d3 100644
> --- a/drivers/iio/industrialio-core.c
> +++ b/drivers/iio/industrialio-core.c
> @@ -812,7 +812,23 @@ static ssize_t iio_format_avail_list(char *buf, const int *vals,
>
> static ssize_t iio_format_avail_range(char *buf, const int *vals, int type)
> {
> - return iio_format_list(buf, vals, type, 3, "[", "]");
> + int length;
> +
> + /*
> + * length refers to the array size , not the number of elements.
> + * The purpose is to print the range [min , step ,max] so length should
> + * be 3 in case of int, and 6 for other types.
> + */
> + switch (type) {
> + case IIO_VAL_INT:
> + length = 3;
> + break;
> + default:
> + length = 6;
> + break;
> + }
> +
> + return iio_format_list(buf, vals, type, length, "[", "]");
> }
>
> static ssize_t iio_read_channel_info_avail(struct device *dev,
