Re: [PATCH 5/7] iio: adc: ad7887: use iio helper function to guarantee direct mode

[Daniel Baluta]

On Tue, May 24, 2016 at 10:18 PM, Alison Schofield <amsfield22@xxxxxxxxx> wrote:
> Replace the code that guarantees the device stays in direct mode
> with iio_device_claim_direct_mode() which does same.
>
> Signed-off-by: Alison Schofield <amsfield22@xxxxxxxxx>
> Cc: Daniel Baluta <daniel.baluta@xxxxxxxxx>

Acked-by: Daniel Baluta <daniel.baluta@xxxxxxxxx>

> ---
>  drivers/iio/adc/ad7887.c | 11 +++++------
>  1 file changed, 5 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/iio/adc/ad7887.c b/drivers/iio/adc/ad7887.c
> index 2d3c397..ee2ccc1 100644
> --- a/drivers/iio/adc/ad7887.c
> +++ b/drivers/iio/adc/ad7887.c
> @@ -156,12 +156,11 @@ static int ad7887_read_raw(struct iio_dev *indio_dev,
>
>         switch (m) {
>         case IIO_CHAN_INFO_RAW:
> -               mutex_lock(&indio_dev->mlock);
> -               if (iio_buffer_enabled(indio_dev))
> -                       ret = -EBUSY;
> -               else
> -                       ret = ad7887_scan_direct(st, chan->address);
> -               mutex_unlock(&indio_dev->mlock);
> +               ret = iio_device_claim_direct_mode(indio_dev);
> +               if (ret)
> +                       return ret;
> +               ret = ad7887_scan_direct(st, chan->address);
> +               iio_device_release_direct_mode(indio_dev);
>
>                 if (ret < 0)
>                         return ret;
> --