On Wed, 29 May 2019 17:20:40 +0300
Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx> wrote:
> The iio_triggered_buffer_{predisable,postenable} functions attach/detach
> the poll functions.
>
> For the predisable hook, the disable code should occur before detaching
> the poll func, and for the postenable hook, the poll func should be
> attached before the enable code.
>
> The driver was slightly reworked. The preenable hook was moved to the
> postenable, to add some symmetry to the postenable/predisable part.
>
> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx>
Looks fine to me, but I'm looking for a tested-by/ack from Peter.
Thanks,
Jonathan
> ---
> drivers/iio/light/tcs3414.c | 30 ++++++++++++++++++++----------
> 1 file changed, 20 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/iio/light/tcs3414.c b/drivers/iio/light/tcs3414.c
> index 205e5659ce6b..ae70bf89be70 100644
> --- a/drivers/iio/light/tcs3414.c
> +++ b/drivers/iio/light/tcs3414.c
> @@ -243,32 +243,42 @@ static const struct iio_info tcs3414_info = {
> .attrs = &tcs3414_attribute_group,
> };
>
> -static int tcs3414_buffer_preenable(struct iio_dev *indio_dev)
> +static int tcs3414_buffer_postenable(struct iio_dev *indio_dev)
> {
> struct tcs3414_data *data = iio_priv(indio_dev);
> + int ret;
> +
> + ret = iio_triggered_buffer_postenable(indio_dev);
> + if (ret)
> + return ret;
>
> data->control |= TCS3414_CONTROL_ADC_EN;
> - return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
> + ret = i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
> data->control);
> + if (ret)
> + iio_triggered_buffer_predisable(indio_dev);
> +
> + return ret;
> }
>
> static int tcs3414_buffer_predisable(struct iio_dev *indio_dev)
> {
> struct tcs3414_data *data = iio_priv(indio_dev);
> - int ret;
> -
> - ret = iio_triggered_buffer_predisable(indio_dev);
> - if (ret < 0)
> - return ret;
> + int ret, ret2;
>
> data->control &= ~TCS3414_CONTROL_ADC_EN;
> - return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
> + ret = i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
> data->control);
> +
> + ret2 = iio_triggered_buffer_predisable(indio_dev);
> + if (!ret)
> + ret = ret2;
> +
> + return ret;
> }
>
> static const struct iio_buffer_setup_ops tcs3414_buffer_setup_ops = {
> - .preenable = tcs3414_buffer_preenable,
> - .postenable = &iio_triggered_buffer_postenable,
> + .postenable = tcs3414_buffer_postenable,
> .predisable = tcs3414_buffer_predisable,
> };
>
