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| author | Alison Schofield <amsfield22@gmail.com> | 2016-10-11 12:33:12 -0700 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2016-10-23 19:33:55 +0100 |
| commit | ac13980584d1fe2493516e1f6e839f0a3c425280 (patch) | |
| tree | 6f2c02a6018107ddf5c445ba6a31c15d53cdf4f2 | |
| parent | 79de2ee469aaef0afb25dde7d65d7fbc91600573 (diff) | |
| download | linux-ac13980584d1fe2493516e1f6e839f0a3c425280.tar.gz linux-ac13980584d1fe2493516e1f6e839f0a3c425280.tar.bz2 linux-ac13980584d1fe2493516e1f6e839f0a3c425280.zip | |
iio: pressure: mpl3115: claim direct mode during raw reads
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>
| -rw-r--r-- | drivers/iio/pressure/mpl3115.c | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/drivers/iio/pressure/mpl3115.c b/drivers/iio/pressure/mpl3115.c index 6392d7b62841..cc3f84139157 100644 --- a/drivers/iio/pressure/mpl3115.c +++ b/drivers/iio/pressure/mpl3115.c @@ -82,8 +82,9 @@ static int mpl3115_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; switch (chan->type) { case IIO_PRESSURE: /* in 0.25 pascal / LSB */ @@ -91,32 +92,39 @@ static int mpl3115_read_raw(struct iio_dev *indio_dev, ret = mpl3115_request(data); if (ret < 0) { mutex_unlock(&data->lock); - return ret; + break; } ret = i2c_smbus_read_i2c_block_data(data->client, MPL3115_OUT_PRESS, 3, (u8 *) &tmp); mutex_unlock(&data->lock); if (ret < 0) - return ret; + break; *val = be32_to_cpu(tmp) >> 12; - return IIO_VAL_INT; + ret = IIO_VAL_INT; + break; case IIO_TEMP: /* in 0.0625 celsius / LSB */ mutex_lock(&data->lock); ret = mpl3115_request(data); if (ret < 0) { mutex_unlock(&data->lock); - return ret; + break; } ret = i2c_smbus_read_i2c_block_data(data->client, MPL3115_OUT_TEMP, 2, (u8 *) &tmp); mutex_unlock(&data->lock); if (ret < 0) - return ret; + break; *val = sign_extend32(be32_to_cpu(tmp) >> 20, 11); - return IIO_VAL_INT; + ret = IIO_VAL_INT; + break; default: - return -EINVAL; + ret = -EINVAL; + break; } + + iio_device_release_direct_mode(indio_dev); + return ret; + case IIO_CHAN_INFO_SCALE: switch (chan->type) { case IIO_PRESSURE: |