In the driver adis16201 read raw does not require an iio_dev->mlock for
reads. It can run concurrently as adis_read_reg_16() is protected by a
transaction lock.
Signed-off-by: Aishwarya Pant <aishpant@xxxxxxxxx>
---
Changes in v3:
-- Fix change log format
-- Send patch to linuc-iio
Changes in v2:
-- Remove read lock
drivers/staging/iio/accel/adis16201.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/drivers/staging/iio/accel/adis16201.c b/drivers/staging/iio/accel/adis16201.c
index d6c8658..fd2baf2 100644
--- a/drivers/staging/iio/accel/adis16201.c
+++ b/drivers/staging/iio/accel/adis16201.c
@@ -223,17 +223,13 @@ static int adis16201_read_raw(struct iio_dev *indio_dev,
default:
return -EINVAL;
}
- mutex_lock(&indio_dev->mlock);
addr = adis16201_addresses[chan->scan_index];
ret = adis_read_reg_16(st, addr, &val16);
- if (ret) {
- mutex_unlock(&indio_dev->mlock);
+ if (ret)
return ret;
- }
val16 &= (1 << bits) - 1;
val16 = (s16)(val16 << (16 - bits)) >> (16 - bits);
*val = val16;
- mutex_unlock(&indio_dev->mlock);
return IIO_VAL_INT;
}
return -EINVAL;
--
2.7.4
--
To unsubscribe from this list: send the line "unsubscribe linux-iio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
