iio: adc: ad7266: claim direct mode during sensor read

Driver was checking for direct mode but not locking it down.
Use iio_device_claim_direct_mode() to guarantee device stays
in direct mode.

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/ad7266.c b/drivers/iio/adc/ad7266.c
index 21e19b60e2b98305b209a648690e8f18f64b40f9..01240aeeeab041fa2c61d9c2b3860dfc3ce07c4c 100644 (file)
--- a/drivers/iio/adc/ad7266.c
+++ b/drivers/iio/adc/ad7266.c
@@ -154,12 +154,11 @@ static int ad7266_read_raw(struct iio_dev *indio_dev,
 
        switch (m) {
        case IIO_CHAN_INFO_RAW:
-               if (iio_buffer_enabled(indio_dev))
-                       return -EBUSY;
-
-               ret = ad7266_read_single(st, val, chan->address);
+               ret = iio_device_claim_direct_mode(indio_dev);
                if (ret)
                        return ret;
+               ret = ad7266_read_single(st, val, chan->address);
+               iio_device_release_direct_mode(indio_dev);
 
                *val = (*val >> 2) & 0xfff;
                if (chan->scan_type.sign == 's')