On Wed, 2019-07-31 at 14:49 -0700, Denis Ciocca wrote:
> [External]
>
> This patch is trying to cleanup for good the buffers operation functions.
> There is no need of using preenable, all can be done into
> postenable. Let's also use logical sequence of operations as
> already done in accel driver.
> Finally also rename the goto label using operation to perform and not
> where it fails.
>
Reviewed-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx>
> Signed-off-by: Denis Ciocca <denis.ciocca@xxxxxx>
> ---
> drivers/iio/pressure/st_pressure_buffer.c | 38 ++++++++++-------------
> 1 file changed, 17 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/iio/pressure/st_pressure_buffer.c b/drivers/iio/pressure/st_pressure_buffer.c
> index f21b630abaa0..77cb2d862f19 100644
> --- a/drivers/iio/pressure/st_pressure_buffer.c
> +++ b/drivers/iio/pressure/st_pressure_buffer.c
> @@ -29,53 +29,49 @@ 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);
> + int err;
>
> press_data->buffer_data = kmalloc(indio_dev->scan_bytes,
> GFP_DMA | GFP_KERNEL);
> - if (press_data->buffer_data == NULL) {
> - err = -ENOMEM;
> - goto allocate_memory_error;
> - }
> + if (!press_data->buffer_data)
> + return -ENOMEM;
>
> err = iio_triggered_buffer_postenable(indio_dev);
> if (err < 0)
> - goto st_press_buffer_postenable_error;
> + goto st_press_free_buffer;
>
> - return err;
> + err = st_sensors_set_enable(indio_dev, true);
> + if (err < 0)
> + goto st_press_buffer_predisable;
> +
> + return 0;
>
> -st_press_buffer_postenable_error:
> +st_press_buffer_predisable:
> + iio_triggered_buffer_predisable(indio_dev);
> +st_press_free_buffer:
> kfree(press_data->buffer_data);
> -allocate_memory_error:
> 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:
> + err2 = iio_triggered_buffer_predisable(indio_dev);
> + if (!err)
> + err = err2;
> +
> kfree(press_data->buffer_data);
> 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,
> };
