iio: st_sensors: Use iio_device_claim/release_direct_mode() when relevant

The st_sensors_core driver hardcodes the content of the
iio_device_claim_direct_mode() and iio_device_release_direct_mode()
helpers. Let's get rid of this handcrafted implementation and use the
proper core helpers instead. Additionally, this lowers the tab level
(which is always good) and prevents the use of the ->currentmode
variable which is not supposed to be used like this anyway.

Cc: Denis Ciocca <denis.ciocca@st.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20220207143840.707510-9-miquel.raynal@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/common/st_sensors/st_sensors_core.c b/drivers/iio/common/st_sensors/st_sensors_core.c
index 0cc66c8..9910ba1 100644 (file)
--- a/drivers/iio/common/st_sensors/st_sensors_core.c
+++ b/drivers/iio/common/st_sensors/st_sensors_core.c
@@ -555,32 +555,28 @@ int st_sensors_read_info_raw(struct iio_dev *indio_dev,
        int err;
        struct st_sensor_data *sdata = iio_priv(indio_dev);
 
-       mutex_lock(&indio_dev->mlock);
-       if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) {
-               err = -EBUSY;
+       err = iio_device_claim_direct_mode(indio_dev);
+       if (err)
+               return err;
+
+       mutex_lock(&sdata->odr_lock);
+
+       err = st_sensors_set_enable(indio_dev, true);
+       if (err < 0)
                goto out;
-       } else {
-               mutex_lock(&sdata->odr_lock);
-               err = st_sensors_set_enable(indio_dev, true);
-               if (err < 0) {
-                       mutex_unlock(&sdata->odr_lock);
-                       goto out;
-               }
 
-               msleep((sdata->sensor_settings->bootime * 1000) / sdata->odr);
-               err = st_sensors_read_axis_data(indio_dev, ch, val);
-               if (err < 0) {
-                       mutex_unlock(&sdata->odr_lock);
-                       goto out;
-               }
+       msleep((sdata->sensor_settings->bootime * 1000) / sdata->odr);
+       err = st_sensors_read_axis_data(indio_dev, ch, val);
+       if (err < 0)
+               goto out;
 
-               *val = *val >> ch->scan_type.shift;
+       *val = *val >> ch->scan_type.shift;
+
+       err = st_sensors_set_enable(indio_dev, false);
 
-               err = st_sensors_set_enable(indio_dev, false);
-               mutex_unlock(&sdata->odr_lock);
-       }
 out:
-       mutex_unlock(&indio_dev->mlock);
+       mutex_unlock(&sdata->odr_lock);
+       iio_device_release_direct_mode(indio_dev);
 
        return err;
 }