2020-09-25 23:11:36

by Tobias Jordan

Subject: [PATCH] leds: tlc591xx: fix leak of device node iterator

In one of the error paths of the for_each_child_of_node loop in
tlc591xx_probe, add missing call to of_node_put.

Fixes: 1ab4531ad132 ("leds: tlc591xx: simplify driver by using the
managed led API")

Signed-off-by: Tobias Jordan <[email protected]>
---
drivers/leds/leds-tlc591xx.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/leds/leds-tlc591xx.c b/drivers/leds/leds-tlc591xx.c
index 0929f1275814..a8cc49752cd5 100644
--- a/drivers/leds/leds-tlc591xx.c
+++ b/drivers/leds/leds-tlc591xx.c
@@ -214,6 +214,7 @@ tlc591xx_probe(struct i2c_client *client,
err = devm_led_classdev_register_ext(dev, &led->ldev,
&init_data);
if (err < 0) {
+ of_node_put(child);
if (err != -EPROBE_DEFER)
dev_err(dev, "couldn't register LED %s\n",
led->ldev.name);
--
2.20.1

2020-09-25 23:19:29

by Marek Behún

Subject: Re: [PATCH] leds: tlc591xx: fix leak of device node iterator

On Sat, 26 Sep 2020 01:10:11 +0200
Tobias Jordan <[email protected]> wrote:

> In one of the error paths of the for_each_child_of_node loop in
> tlc591xx_probe, add missing call to of_node_put.
>
> Fixes: 1ab4531ad132 ("leds: tlc591xx: simplify driver by using the
> managed led API")
>
> Signed-off-by: Tobias Jordan <[email protected]>
> ---
> drivers/leds/leds-tlc591xx.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/leds/leds-tlc591xx.c b/drivers/leds/leds-tlc591xx.c
> index 0929f1275814..a8cc49752cd5 100644
> --- a/drivers/leds/leds-tlc591xx.c
> +++ b/drivers/leds/leds-tlc591xx.c
> @@ -214,6 +214,7 @@ tlc591xx_probe(struct i2c_client *client,
> err = devm_led_classdev_register_ext(dev, &led->ldev,
> &init_data);
> if (err < 0) {
> + of_node_put(child);
> if (err != -EPROBE_DEFER)
> dev_err(dev, "couldn't register LED %s\n",
> led->ldev.name);

This won't apply on pavel's for-next tree, there is no check for
EPROBE_DEFER, see
https://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds.git/tree/drivers/leds/leds-tlc591xx.c?h=for-next