On Sat, 11 Feb 2023, Deepak R Varma wrote:
> The iterator for_each_available_child_of_node() increments the refcount
> of the child node it is processing. Release such a reference when the
> loop needs to breaks due to en error during its execution.
> Issue identified using for_each_child.cocci Coccinelle semantic patch.
>
> Signed-off-by: Deepak R Varma <drv@xxxxxxxxx>
> ---
> Please note: The proposed change is compile tested only. I do not have the
> necessary hardware to perform additional testing. Please suggest if there is an
> alternate means available to further test this change.
Please send this again and include the authors.
Perhaps they would be kind enough to test it or provide guidance.
> drivers/leds/rgb/leds-qcom-lpg.c | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/leds/rgb/leds-qcom-lpg.c b/drivers/leds/rgb/leds-qcom-lpg.c
> index 67f48f222109..993fb9cf0204 100644
> --- a/drivers/leds/rgb/leds-qcom-lpg.c
> +++ b/drivers/leds/rgb/leds-qcom-lpg.c
> @@ -1112,8 +1112,10 @@ static int lpg_add_led(struct lpg *lpg, struct device_node *np)
> i = 0;
> for_each_available_child_of_node(np, child) {
> ret = lpg_parse_channel(lpg, child, &led->channels[i]);
> - if (ret < 0)
> + if (ret < 0) {
> + of_node_put(child);
> return ret;
> + }
>
> info[i].color_index = led->channels[i]->color;
> info[i].intensity = 0;
> @@ -1291,8 +1293,10 @@ static int lpg_probe(struct platform_device *pdev)
>
> for_each_available_child_of_node(pdev->dev.of_node, np) {
> ret = lpg_add_led(lpg, np);
> - if (ret)
> + if (ret) {
> + of_node_put(np);
> return ret;
> + }
> }
>
> for (i = 0; i < lpg->num_channels; i++)
> --
> 2.34.1
>
>
>
--
Lee Jones [李琼斯]
