On Mon, May 10, 2021 at 12:59 PM Andy Shevchenko
<andy.shevchenko@xxxxxxxxx> wrote:
>
> device_for_each_child_node() bumps a reference counting of a returned variable.
> We have to balance it whenever we return to the caller.
This feels like the device_for_each_child_node() [and the of_node
variant] iterator[s] need[s] some re-design to account for how easy it
is to slip stuff by.
But that's something quite out of this scope.
Reviewed-by: Alexandru Ardelean <ardeleanalex@xxxxxxxxx>
>
> Fixes: cbbb819837f6 ("iio: dac: ad5770r: Add AD5770R support")
> Cc: Alexandru Tachici <alexandru.tachici@xxxxxxxxxx>
> Signed-off-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
> ---
> drivers/iio/dac/ad5770r.c | 16 +++++++++++-----
> 1 file changed, 11 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/iio/dac/ad5770r.c b/drivers/iio/dac/ad5770r.c
> index 7ab2ccf90863..8107f7bbbe3c 100644
> --- a/drivers/iio/dac/ad5770r.c
> +++ b/drivers/iio/dac/ad5770r.c
> @@ -524,23 +524,29 @@ static int ad5770r_channel_config(struct ad5770r_state *st)
> device_for_each_child_node(&st->spi->dev, child) {
> ret = fwnode_property_read_u32(child, "num", &num);
> if (ret)
> - return ret;
> - if (num >= AD5770R_MAX_CHANNELS)
> - return -EINVAL;
> + goto err_child_out;
> + if (num >= AD5770R_MAX_CHANNELS) {
> + ret = -EINVAL;
> + goto err_child_out;
> + }
>
> ret = fwnode_property_read_u32_array(child,
> "adi,range-microamp",
> tmp, 2);
> if (ret)
> - return ret;
> + goto err_child_out;
>
> min = tmp[0] / 1000;
> max = tmp[1] / 1000;
> ret = ad5770r_store_output_range(st, min, max, num);
> if (ret)
> - return ret;
> + goto err_child_out;
> }
>
> + return 0;
> +
> +err_child_out:
> + fwnode_handle_put(child);
> return ret;
> }
>
> --
> 2.31.1
>
