4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pan Bian <bianpan2016@xxxxxxx> [ Upstream commit 91ca1a8c584f55857b1f6ab20a1d3a1ce7a559bb ] At the end of function ad7150_write_event_config(), directly returns 0. As a result, the errors will be ignored by the callers. It may be better to return variable "ret". Signed-off-by: Pan Bian <bianpan2016@xxxxxxx> Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/staging/iio/cdc/ad7150.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/staging/iio/cdc/ad7150.c +++ b/drivers/staging/iio/cdc/ad7150.c @@ -274,7 +274,7 @@ static int ad7150_write_event_config(str error_ret: mutex_unlock(&chip->state_lock); - return 0; + return ret; } static int ad7150_read_event_value(struct iio_dev *indio_dev,