* [PATCH] led: qcom-lpg: Fix bugs in lpg_add_led & lpg_probe
@ 2023-05-15 8:26 luhongfei
2023-05-25 10:20 ` Lee Jones
0 siblings, 1 reply; 2+ messages in thread
From: luhongfei @ 2023-05-15 8:26 UTC (permalink / raw)
To: Pavel Machek, Lee Jones, Thierry Reding, Anjelique Melendez,
Uwe Kleine-König, Conor Dooley, Dmitry Baryshkov,
Bjorn Andersson, luhongfei, open list:LED SUBSYSTEM, open list
Cc: opensource.kernel, luhongfei
for_each_available_child_of_node in lpg_probe and lpg_add_led need
to execute of_node_put before return. this patch could fix this bug.
Signed-off-by: luhongfei <luhongfei@vivo.com>
---
drivers/leds/rgb/leds-qcom-lpg.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
mode change 100644 => 100755 drivers/leds/rgb/leds-qcom-lpg.c
diff --git a/drivers/leds/rgb/leds-qcom-lpg.c b/drivers/leds/rgb/leds-qcom-lpg.c
index 55a037234df1..0e8ff36c4bf7
--- a/drivers/leds/rgb/leds-qcom-lpg.c
+++ b/drivers/leds/rgb/leds-qcom-lpg.c
@@ -1173,8 +1173,10 @@ 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;
@@ -1352,8 +1354,10 @@ 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++)
--
2.39.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] led: qcom-lpg: Fix bugs in lpg_add_led & lpg_probe
2023-05-15 8:26 [PATCH] led: qcom-lpg: Fix bugs in lpg_add_led & lpg_probe luhongfei
@ 2023-05-25 10:20 ` Lee Jones
0 siblings, 0 replies; 2+ messages in thread
From: Lee Jones @ 2023-05-25 10:20 UTC (permalink / raw)
To: luhongfei
Cc: Pavel Machek, Thierry Reding, Anjelique Melendez,
Uwe Kleine-König, Conor Dooley, Dmitry Baryshkov,
Bjorn Andersson, luhongfei, open list:LED SUBSYSTEM, open list,
opensource.kernel
Please improve the subject line. Maybe:
"Fix resource leaks in for_each_available_child_of_node() loops"
On Mon, 15 May 2023, luhongfei wrote:
> for_each_available_child_of_node in lpg_probe and lpg_add_led need
> to execute of_node_put before return. this patch could fix this bug.
"Ensure child node references are decremented properly in the error path."
> Signed-off-by: luhongfei <luhongfei@vivo.com>
Please use your full name.
> ---
> drivers/leds/rgb/leds-qcom-lpg.c | 8 ++++++--
> 1 file changed, 6 insertions(+), 2 deletions(-)
> mode change 100644 => 100755 drivers/leds/rgb/leds-qcom-lpg.c
>
> diff --git a/drivers/leds/rgb/leds-qcom-lpg.c b/drivers/leds/rgb/leds-qcom-lpg.c
> index 55a037234df1..0e8ff36c4bf7
> --- a/drivers/leds/rgb/leds-qcom-lpg.c
> +++ b/drivers/leds/rgb/leds-qcom-lpg.c
> @@ -1173,8 +1173,10 @@ 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;
> @@ -1352,8 +1354,10 @@ 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;
> + }
> }
Code is fine.
--
Lee Jones [李琼斯]
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2023-05-15 8:26 [PATCH] led: qcom-lpg: Fix bugs in lpg_add_led & lpg_probe luhongfei
2023-05-25 10:20 ` Lee Jones
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