function gp2ap020a00f_get_thresh_reg() is unsigned but returning -EINVAL errcode, and thresh_reg_l is unsigned but receiving -EINVAL errcode. so we have to change u8 -> int. Signed-off-by: Haowen Bai <baihaowen@xxxxxxxxx> --- V1->V2: s8 is not enough to hold an (arbitrary) error code. To be on the safe side we need to use int drivers/iio/light/gp2ap020a00f.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/iio/light/gp2ap020a00f.c b/drivers/iio/light/gp2ap020a00f.c index b820041159f7..b0e62d3c6fa0 100644 --- a/drivers/iio/light/gp2ap020a00f.c +++ b/drivers/iio/light/gp2ap020a00f.c @@ -994,7 +994,7 @@ static irqreturn_t gp2ap020a00f_trigger_handler(int irq, void *data) return IRQ_HANDLED; } -static u8 gp2ap020a00f_get_thresh_reg(const struct iio_chan_spec *chan, +static int gp2ap020a00f_get_thresh_reg(const struct iio_chan_spec *chan, enum iio_event_direction event_dir) { switch (chan->type) { @@ -1025,7 +1025,7 @@ static int gp2ap020a00f_write_event_val(struct iio_dev *indio_dev, struct gp2ap020a00f_data *data = iio_priv(indio_dev); bool event_en = false; u8 thresh_val_id; - u8 thresh_reg_l; + int thresh_reg_l; int err = 0; mutex_lock(&data->lock); @@ -1082,7 +1082,7 @@ static int gp2ap020a00f_read_event_val(struct iio_dev *indio_dev, int *val, int *val2) { struct gp2ap020a00f_data *data = iio_priv(indio_dev); - u8 thresh_reg_l; + int thresh_reg_l; int err = IIO_VAL_INT; mutex_lock(&data->lock); -- 2.7.4