On Fri, 8 May 2020 17:39:35 +0300
Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx> wrote:
> This change makes the use of devm_iio_kfifo_allocate() to attach the
> life-cycle of the kfifo buffer to the parent (client->dev) object.
>
> This removes the need to explicitly free 'indio_dev->buffer' via
> iio_kfifo_free(), which is the main intent.
>
> Signed-off-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx>
*mutters darkly*. Technically this patch adds a non obvious ordering
issue in remove, but then you fix it in the next one so I'll let that go.
However, you've not tried building patch 1 on it's own..
drivers/staging/iio/impedance-analyzer/ad5933.c:752:17: error: label 'error_unreg_ring' was not declared
drivers/staging/iio/impedance-analyzer/ad5933.c:756:17: error: label 'error_unreg_ring' was not declared
CC [M] drivers/staging/iio/impedance-analyzer/ad5933.o
drivers/staging/iio/impedance-analyzer/ad5933.c: In function ‘ad5933_probe’:
drivers/staging/iio/impedance-analyzer/ad5933.c:756:3: error: label ‘error_unreg_ring’ used but not defined
756 | goto error_unreg_ring;
| ^~~~
make[4]: *** [scripts/Makefile.build:267: drivers/staging/iio/impedance-analyzer/ad5933.o] Error 1
make[3]: *** [scripts/Makefile.build:488: drivers/staging/iio/impedance-analyzer] Error 2
make[2]: *** [scripts/Makefile.build:488: drivers/staging/iio] Error 2
make[1]: *** [scripts/Makefile.build:488: drivers/staging] Error 2
make: *** [Makefile:1722: drivers] Error 2
Easiest option here is just to merge the two patches into one. I've
done that and mashed the two commit messages into one semi-coherent whole.
Applied both patches as one to the togreg branch of iio.git and pushed out
as testing for the autobuilders to play with it.
thanks,
Jonathan
> ---
> drivers/staging/iio/impedance-analyzer/ad5933.c | 10 ++++------
> 1 file changed, 4 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/staging/iio/impedance-analyzer/ad5933.c b/drivers/staging/iio/impedance-analyzer/ad5933.c
> index af0bcf95ee8a..633adf1a08c1 100644
> --- a/drivers/staging/iio/impedance-analyzer/ad5933.c
> +++ b/drivers/staging/iio/impedance-analyzer/ad5933.c
> @@ -602,11 +602,12 @@ static const struct iio_buffer_setup_ops ad5933_ring_setup_ops = {
> .postdisable = ad5933_ring_postdisable,
> };
>
> -static int ad5933_register_ring_funcs_and_init(struct iio_dev *indio_dev)
> +static int ad5933_register_ring_funcs_and_init(struct device *dev,
> + struct iio_dev *indio_dev)
> {
> struct iio_buffer *buffer;
>
> - buffer = iio_kfifo_allocate();
> + buffer = devm_iio_kfifo_allocate(dev);
> if (!buffer)
> return -ENOMEM;
>
> @@ -742,7 +743,7 @@ static int ad5933_probe(struct i2c_client *client,
> indio_dev->channels = ad5933_channels;
> indio_dev->num_channels = ARRAY_SIZE(ad5933_channels);
>
> - ret = ad5933_register_ring_funcs_and_init(indio_dev);
> + ret = ad5933_register_ring_funcs_and_init(&client->dev, indio_dev);
> if (ret)
> goto error_disable_mclk;
>
> @@ -756,8 +757,6 @@ static int ad5933_probe(struct i2c_client *client,
>
> return 0;
>
> -error_unreg_ring:
> - iio_kfifo_free(indio_dev->buffer);
> error_disable_mclk:
> clk_disable_unprepare(st->mclk);
> error_disable_reg:
> @@ -772,7 +771,6 @@ static int ad5933_remove(struct i2c_client *client)
> struct ad5933_state *st = iio_priv(indio_dev);
>
> iio_device_unregister(indio_dev);
> - iio_kfifo_free(indio_dev->buffer);
> regulator_disable(st->reg);
> clk_disable_unprepare(st->mclk);
>
