From: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx> commit 24febc99ca725dcf42d57168a2f4e8a75a5ade92 upstream. On success, ad74413r_get_single_adc_result() returns IIO_VAL_INT aka 1. So currently, the IIO_CHAN_INFO_PROCESSED case is effectively equivalent to the IIO_CHAN_INFO_RAW case, and we never call ad74413r_adc_to_resistance_result() to convert the adc measurement to ohms. Check ret for being negative rather than non-zero. Fixes: fea251b6a5dbd (iio: addac: add AD74413R driver) Signed-off-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx> Reviewed-by: Nuno Sa <nuno.sa@xxxxxxxxxx> Link: https://lore.kernel.org/r/20230503095817.452551-1-linux@xxxxxxxxxxxxxxxxxx Cc: <Stable@xxxxxxxxxxxxxxx> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/iio/addac/ad74413r.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/iio/addac/ad74413r.c +++ b/drivers/iio/addac/ad74413r.c @@ -981,7 +981,7 @@ static int ad74413r_read_raw(struct iio_ ret = ad74413r_get_single_adc_result(indio_dev, chan->channel, val); - if (ret) + if (ret < 0) return ret; ad74413r_adc_to_resistance_result(*val, val);
