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>

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;