From: Alison Schofield <amsfield22@gmail.com>
Date: Tue, 24 May 2016 19:19:49 +0000 (-0700)
Subject: iio: adc: ad7923: use iio helper function to guarantee direct mode
X-Git-Tag: v4.8-rc1~193^2~234^2~16
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9f57e068e01c14f34f69244e1f4a6c567d93cdfe;p=karo-tx-linux.git

iio: adc: ad7923: use iio helper function to guarantee direct mode

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@gmail.com>
Acked-by: Daniel Baluta <daniel.baluta@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
---

diff --git a/drivers/iio/adc/ad7923.c b/drivers/iio/adc/ad7923.c
index 45e29ccd824f..ff444c19d749 100644
--- a/drivers/iio/adc/ad7923.c
+++ b/drivers/iio/adc/ad7923.c
@@ -233,12 +233,11 @@ static int ad7923_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 = ad7923_scan_direct(st, chan->address);
-		mutex_unlock(&indio_dev->mlock);
+		ret = iio_device_claim_direct_mode(indio_dev);
+		if (ret)
+			return ret;
+		ret = ad7923_scan_direct(st, chan->address);
+		iio_device_release_direct_mode(indio_dev);
 
 		if (ret < 0)
 			return ret;