On Wed, 2019-07-31 at 14:52 -0700, Denis Ciocca wrote:
> [External]
>
> Setup buffer_setup_ops pre/post enable/disable to use
> st_sensor_buffers functions for memory allocation/de-allocation.
>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx>
> Signed-off-by: Denis Ciocca <denis.ciocca@xxxxxx>
> ---
> drivers/iio/magnetometer/st_magn_buffer.c | 14 +++-----------
> 1 file changed, 3 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/iio/magnetometer/st_magn_buffer.c b/drivers/iio/magnetometer/st_magn_buffer.c
> index 658d627dad8e..592972f6450e 100644
> --- a/drivers/iio/magnetometer/st_magn_buffer.c
> +++ b/drivers/iio/magnetometer/st_magn_buffer.c
> @@ -31,17 +31,11 @@ int st_magn_trig_set_state(struct iio_trigger *trig, bool state)
>
> static int st_magn_buffer_postenable(struct iio_dev *indio_dev)
> {
> - struct st_sensor_data *mdata = iio_priv(indio_dev);
> int err;
>
> - mdata->buffer_data = kmalloc(indio_dev->scan_bytes,
> - GFP_DMA | GFP_KERNEL);
> - if (!mdata->buffer_data)
> - return -ENOMEM;
> -
> err = iio_triggered_buffer_postenable(indio_dev);
> if (err < 0)
> - goto st_magn_free_buffer;
> + return err;
>
> err = st_sensors_set_enable(indio_dev, true);
> if (err < 0)
> @@ -51,14 +45,11 @@ static int st_magn_buffer_postenable(struct iio_dev *indio_dev)
>
> st_magn_buffer_predisable:
> iio_triggered_buffer_predisable(indio_dev);
> -st_magn_free_buffer:
> - kfree(mdata->buffer_data);
> return err;
> }
>
> static int st_magn_buffer_predisable(struct iio_dev *indio_dev)
> {
> - struct st_sensor_data *mdata = iio_priv(indio_dev);
> int err, err2;
>
> err = st_sensors_set_enable(indio_dev, false);
> @@ -67,13 +58,14 @@ static int st_magn_buffer_predisable(struct iio_dev *indio_dev)
> if (!err)
> err = err2;
>
> - kfree(mdata->buffer_data);
> return err;
> }
>
> static const struct iio_buffer_setup_ops st_magn_buffer_setup_ops = {
> + .preenable = &st_sensors_buffer_preenable,
> .postenable = &st_magn_buffer_postenable,
> .predisable = &st_magn_buffer_predisable,
> + .postdisable = &st_sensors_buffer_postdisable,
> };
>
> int st_magn_allocate_ring(struct iio_dev *indio_dev)
