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iio: accel: mma8452: claim direct mode during raw reads

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Driver was checking for direct mode but not locking it.  Use
claim/release helper functions to guarantee the device stays
in direct mode during raw reads.

Signed-off-by: Alison Schofield <amsfield22@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Alison Schofield 2016-10-11 12:31:36 -07:00 committed by Jonathan Cameron
parent 4e2cf0e21f
commit 4d9b0413e2
1 changed files with 4 additions and 2 deletions
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6
drivers/iio/accel/mma8452.c
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@ -459,12 +459,14 @@ static int mma8452_read_raw(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_RAW:
if (iio_buffer_enabled(indio_dev))
return -EBUSY;
ret = iio_device_claim_direct_mode(indio_dev);
if (ret)
return ret;
mutex_lock(&data->lock);
ret = mma8452_read(data, buffer);
mutex_unlock(&data->lock);
iio_device_release_direct_mode(indio_dev);
if (ret < 0)
return ret;