iio: imu: adis16480: assign bias value only if operation succeeded

This was found only after the whole thing with the inline functions, but
the compiler actually found something. The value of the `bias` (in
adis16480_get_calibbias()) should only be set if the read operation was
successful.

No actual known problem occurs as users of this function all
ultimately check the return value.  Hence probably not stable material.

Fixes: 2f3abe6cbb6c9 ("iio:imu: Add support for the ADIS16480 and similar IMUs")
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/imu/adis16480.c b/drivers/iio/imu/adis16480.c
index b9e2695bcfad64d0e65558bd8361b53f8c6d2834..c0e7e768be4138e46befd84a47e40b6b469a5eb6 100644 (file)
--- a/drivers/iio/imu/adis16480.c
+++ b/drivers/iio/imu/adis16480.c
@@ -451,12 +451,14 @@ static int adis16480_get_calibbias(struct iio_dev *indio_dev,
        case IIO_MAGN:
        case IIO_PRESSURE:
                ret = adis_read_reg_16(&st->adis, reg, &val16);
-               *bias = sign_extend32(val16, 15);
+               if (ret == 0)
+                       *bias = sign_extend32(val16, 15);
                break;
        case IIO_ANGL_VEL:
        case IIO_ACCEL:
                ret = adis_read_reg_32(&st->adis, reg, &val32);
-               *bias = sign_extend32(val32, 31);
+               if (ret == 0)
+                       *bias = sign_extend32(val32, 31);
                break;
        default:
                ret = -EINVAL;