On Sat, 26 Sep 2020 18:19:46 +0200
Tobias Jordan <kernel@xxxxxxx> wrote:
> Add missing of_node_put calls when exiting the for_each_child_of_node
> loop in rcar_gyroadc_parse_subdevs early.
>
> Also add goto-exception handling for the error paths in that loop.
>
> Fixes: 059c53b32329 ("iio: adc: Add Renesas GyroADC driver")
> Signed-off-by: Tobias Jordan <kernel@xxxxxxx>
> ---
> v2:
> - added an of_node_put to the non-error "break" at the end
> - used gotos for the error cases, doesn't look as bad as I thought
Was marginal, so I'll go with it.
Applied to the fixes-togreg branch of iio.git and marked for stable.
>
> drivers/iio/adc/rcar-gyroadc.c | 21 +++++++++++++++------
> 1 file changed, 15 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/iio/adc/rcar-gyroadc.c b/drivers/iio/adc/rcar-gyroadc.c
> index dcaefc108ff6..9f38cf3c7dc2 100644
> --- a/drivers/iio/adc/rcar-gyroadc.c
> +++ b/drivers/iio/adc/rcar-gyroadc.c
> @@ -357,7 +357,7 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev)
> num_channels = ARRAY_SIZE(rcar_gyroadc_iio_channels_3);
> break;
> default:
> - return -EINVAL;
> + goto err_e_inval;
> }
>
> /*
> @@ -374,7 +374,7 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev)
> dev_err(dev,
> "Failed to get child reg property of ADC \"%pOFn\".\n",
> child);
> - return ret;
> + goto err_of_node_put;
> }
>
> /* Channel number is too high. */
> @@ -382,7 +382,7 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev)
> dev_err(dev,
> "Only %i channels supported with %pOFn, but reg = <%i>.\n",
> num_channels, child, reg);
> - return -EINVAL;
> + goto err_e_inval;
> }
> }
>
> @@ -391,7 +391,7 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev)
> dev_err(dev,
> "Channel %i uses different ADC mode than the rest.\n",
> reg);
> - return -EINVAL;
> + goto err_e_inval;
> }
>
> /* Channel is valid, grab the regulator. */
> @@ -401,7 +401,8 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev)
> if (IS_ERR(vref)) {
> dev_dbg(dev, "Channel %i 'vref' supply not connected.\n",
> reg);
> - return PTR_ERR(vref);
> + ret = PTR_ERR(vref);
> + goto err_of_node_put;
> }
>
> priv->vref[reg] = vref;
> @@ -425,8 +426,10 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev)
> * attached to the GyroADC at a time, so if we found it,
> * we can stop parsing here.
> */
> - if (childmode == RCAR_GYROADC_MODE_SELECT_1_MB88101A)
> + if (childmode == RCAR_GYROADC_MODE_SELECT_1_MB88101A) {
> + of_node_put(child);
> break;
> + }
> }
>
> if (first) {
> @@ -435,6 +438,12 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev)
> }
>
> return 0;
> +
> +err_e_inval:
> + ret = -EINVAL;
> +err_of_node_put:
> + of_node_put(child);
> + return ret;
> }
>
> static void rcar_gyroadc_deinit_supplies(struct iio_dev *indio_dev)
