iio: sensors-core: st: Check st_sensors_set_drdy_int_pin()'s return value

Value from st_sensors_set_drdy_int_pin() is assigned to err here,
but that stored value is not used before it is overwritten.  To fix
this we're enforcing a check on st_sensors_set_drdy_int_pin()'s
return value and if it's an error, we're returning right away.

Cc: jic23@kernel.org
Cc: linux-iio@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c
index 8a4ec00a91a0..24cfe4e044f9 100644
--- a/drivers/iio/common/st_sensors/st_sensors_core.c
+++ b/drivers/iio/common/st_sensors/st_sensors_core.c
@@ -306,8 +306,11 @@ int st_sensors_init_sensor(struct iio_dev *indio_dev,
         if (of_pdata)
                 pdata = of_pdata;
 
-        if (pdata)
+        if (pdata) {
                 err = st_sensors_set_drdy_int_pin(indio_dev, pdata);
+                if (err < 0)
+                        return err;
+        }
 
         err = st_sensors_set_enable(indio_dev, false);
         if (err < 0)