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path: root/drivers/iio/pressure/st_pressure_buffer.c
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Diffstat (limited to 'drivers/iio/pressure/st_pressure_buffer.c')
-rw-r--r--drivers/iio/pressure/st_pressure_buffer.c39
1 files changed, 13 insertions, 26 deletions
diff --git a/drivers/iio/pressure/st_pressure_buffer.c b/drivers/iio/pressure/st_pressure_buffer.c
index 4566e08a64a1..418dbf9e6e1e 100644
--- a/drivers/iio/pressure/st_pressure_buffer.c
+++ b/drivers/iio/pressure/st_pressure_buffer.c
@@ -29,52 +29,39 @@ int st_press_trig_set_state(struct iio_trigger *trig, bool state)
return st_sensors_set_dataready_irq(indio_dev, state);
}
-static int st_press_buffer_preenable(struct iio_dev *indio_dev)
-{
- return st_sensors_set_enable(indio_dev, true);
-}
-
static int st_press_buffer_postenable(struct iio_dev *indio_dev)
{
int err;
- struct st_sensor_data *press_data = iio_priv(indio_dev);
-
- press_data->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
- if (press_data->buffer_data == NULL) {
- err = -ENOMEM;
- goto allocate_memory_error;
- }
err = iio_triggered_buffer_postenable(indio_dev);
if (err < 0)
- goto st_press_buffer_postenable_error;
+ return err;
- return err;
+ err = st_sensors_set_enable(indio_dev, true);
+ if (err < 0)
+ goto st_press_buffer_predisable;
-st_press_buffer_postenable_error:
- kfree(press_data->buffer_data);
-allocate_memory_error:
+ return 0;
+
+st_press_buffer_predisable:
+ iio_triggered_buffer_predisable(indio_dev);
return err;
}
static int st_press_buffer_predisable(struct iio_dev *indio_dev)
{
- int err;
- struct st_sensor_data *press_data = iio_priv(indio_dev);
-
- err = iio_triggered_buffer_predisable(indio_dev);
- if (err < 0)
- goto st_press_buffer_predisable_error;
+ int err, err2;
err = st_sensors_set_enable(indio_dev, false);
-st_press_buffer_predisable_error:
- kfree(press_data->buffer_data);
+ err2 = iio_triggered_buffer_predisable(indio_dev);
+ if (!err)
+ err = err2;
+
return err;
}
static const struct iio_buffer_setup_ops st_press_buffer_setup_ops = {
- .preenable = &st_press_buffer_preenable,
.postenable = &st_press_buffer_postenable,
.predisable = &st_press_buffer_predisable,
};