staging:iio:adc:ad7192: return len and fix out of range checking

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/iio/adc/ad7291.c b/drivers/staging/iio/adc/ad7291.c
index 4697ebb..c486d72 100644 (file)
--- a/drivers/staging/iio/adc/ad7291.c
+++ b/drivers/staging/iio/adc/ad7291.c
@@ -241,10 +241,14 @@ static inline ssize_t ad7291_set_hyst(struct device *dev,
 
        if (ret < 0)
                return ret;
-       if (data < 4096)
+       if (data > AD7291_VALUE_MASK)
                return -EINVAL;
 
-       return ad7291_i2c_write(chip, this_attr->address, data);
+       ret = ad7291_i2c_write(chip, this_attr->address, data);
+       if (ret < 0)
+               return ret;
+
+       return len;
 }
 
 static IIO_DEVICE_ATTR(in_temp0_thresh_both_hyst_raw,
@@ -352,7 +356,7 @@ static int ad7291_write_event_value(struct iio_dev *indio_dev,
 
        switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) {
        case IIO_VOLTAGE:
-               if (val > 0xFFF || val < 0)
+               if (val > AD7291_VALUE_MASK || val < 0)
                        return -EINVAL;
                reg = ad7291_limit_regs[IIO_EVENT_CODE_EXTRACT_NUM(event_code)]
                        [!(IIO_EVENT_CODE_EXTRACT_DIR(event_code) ==