staging: iio: tsl2x7x: add missing error checks

The functions in_illuminance0_calibrate_store() and
in_illuminance0_lux_table_store() did not have complete error handling
in place. This patch adds the missing error handling.
Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/staging/iio/light/tsl2x7x.c

@@ -940,8 +940,11 @@ static ssize_t in_illuminance0_calibrate_store(struct device *dev,
 	if (strtobool(buf, &value))
 		return -EINVAL;
 
-	if (value)
-		tsl2x7x_als_calibrate(indio_dev);
+	if (value) {
+		ret = tsl2x7x_als_calibrate(indio_dev);
+		if (ret < 0)
+			return ret;
+	}
 
 	ret = tsl2x7x_invoke_change(indio_dev);
 	if (ret < 0)
@@ -1006,8 +1009,11 @@ static ssize_t in_illuminance0_lux_table_store(struct device *dev,
 		return -EINVAL;
 	}
 
-	if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING)
-		tsl2x7x_chip_off(indio_dev);
+	if (chip->tsl2x7x_chip_status == TSL2X7X_CHIP_WORKING) {
+		ret = tsl2x7x_chip_off(indio_dev);
+		if (ret < 0)
+			return ret;
+	}
 
 	/* Zero out the table */
 	memset(chip->tsl2x7x_device_lux, 0, sizeof(chip->tsl2x7x_device_lux));