staging: adis16203: Remove locking on raw reads of IIO_CHAN_INFO_CALIBBIAS

adis16203_read_raw does not need lock for IIO_CHAN_INFO_CALIBBIAS
since adis_read_reg_16 is already atomic and nothing else needs to be
protected.

Signed-off-by: Gargi Sharma <gs051095@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/staging/iio/accel/adis16203.c b/drivers/staging/iio/accel/adis16203.c
index b59755a..faa2869 100644 (file)
--- a/drivers/staging/iio/accel/adis16203.c
+++ b/drivers/staging/iio/accel/adis16203.c
@@ -203,17 +203,14 @@ static int adis16203_read_raw(struct iio_dev *indio_dev,
                return IIO_VAL_INT;
        case IIO_CHAN_INFO_CALIBBIAS:
                bits = 14;
-               mutex_lock(&indio_dev->mlock);
                addr = adis16203_addresses[chan->scan_index];
                ret = adis_read_reg_16(st, addr, &val16);
                if (ret) {
-                       mutex_unlock(&indio_dev->mlock);
                        return ret;
                }
                val16 &= (1 << bits) - 1;
                val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
                *val = val16;
-               mutex_unlock(&indio_dev->mlock);
                return IIO_VAL_INT;
        default:
                return -EINVAL;