[PATCH 5/7] iio: adc: ad7887: use iio helper function to guarantee direct mode

From: Alison Schofield
Date: Tue May 24 2016 - 15:18:49 EST


Replace the code that guarantees the device stays in direct mode
with iio_device_claim_direct_mode() which does same.

Signed-off-by: Alison Schofield <amsfield22@xxxxxxxxx>
Cc: Daniel Baluta <daniel.baluta@xxxxxxxxx>
---
drivers/iio/adc/ad7887.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/iio/adc/ad7887.c b/drivers/iio/adc/ad7887.c
index 2d3c397..ee2ccc1 100644
--- a/drivers/iio/adc/ad7887.c
+++ b/drivers/iio/adc/ad7887.c
@@ -156,12 +156,11 @@ static int ad7887_read_raw(struct iio_dev *indio_dev,

switch (m) {
case IIO_CHAN_INFO_RAW:
- mutex_lock(&indio_dev->mlock);
- if (iio_buffer_enabled(indio_dev))
- ret = -EBUSY;
- else
- ret = ad7887_scan_direct(st, chan->address);
- mutex_unlock(&indio_dev->mlock);
+ ret = iio_device_claim_direct_mode(indio_dev);
+ if (ret)
+ return ret;
+ ret = ad7887_scan_direct(st, chan->address);
+ iio_device_release_direct_mode(indio_dev);

if (ret < 0)
return ret;
--
2.1.4