diff options
| author | Alison Schofield <amsfield22@gmail.com> | 2016-06-07 17:19:05 -0700 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2016-06-11 17:18:22 +0100 |
| commit | dfc07df0f91a4eabfd3d974e5b1b6b4cfde99e6f (patch) | |
| tree | 702ec8480295c82f99db92a4ee044749c518b9f3 | |
| parent | ae148e51071455519d52051ad8ee5e5776e17966 (diff) | |
iio: light: gp2ap020a00f: use iio helper function to lock direct mode
Replace the code that guarantees the device stays in direct mode
with iio_device_claim_direct_mode() which does same. Includes a
tiny bit of refactoring (single case -> if) and simplified return
flow.
Also prevents a theoretical race condition by effectively taking the lock
a little earlier than before.
Signed-off-by: Alison Schofield <amsfield22@gmail.com>
Cc: Daniel Baluta <daniel.baluta@gmail.com>
Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| -rw-r--r-- | drivers/iio/light/gp2ap020a00f.c | 18 |
1 files changed, 5 insertions, 13 deletions
diff --git a/drivers/iio/light/gp2ap020a00f.c b/drivers/iio/light/gp2ap020a00f.c index 6d41086f7c64..af73af3586a9 100644 --- a/drivers/iio/light/gp2ap020a00f.c +++ b/drivers/iio/light/gp2ap020a00f.c @@ -1287,22 +1287,14 @@ static int gp2ap020a00f_read_raw(struct iio_dev *indio_dev, struct gp2ap020a00f_data *data = iio_priv(indio_dev); int err = -EINVAL; - mutex_lock(&data->lock); - - switch (mask) { - case IIO_CHAN_INFO_RAW: - if (iio_buffer_enabled(indio_dev)) { - err = -EBUSY; - goto error_unlock; - } + if (mask == IIO_CHAN_INFO_RAW) { + err = iio_device_claim_direct_mode(indio_dev); + if (err) + return err; err = gp2ap020a00f_read_channel(data, chan, val); - break; + iio_device_release_direct_mode(indio_dev); } - -error_unlock: - mutex_unlock(&data->lock); - return err < 0 ? err : IIO_VAL_INT; } |