linux-kernel - [PATCH AUTOSEL 6.4 02/40] led: qcom-lpg: Fix resource leaks in for_each_available_child_of

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Message-Id: <20230724013140.2327815-2-sashal@kernel.org>
Date:   Sun, 23 Jul 2023 21:31:02 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Lu Hongfei <luhongfei@...o.com>, Lee Jones <lee@...nel.org>,
        Sasha Levin <sashal@...nel.org>, rpurdie@...ys.net,
        jacek.anaszewski@...il.com, pavel@....cz,
        linux-leds@...r.kernel.org
Subject: [PATCH AUTOSEL 6.4 02/40] led: qcom-lpg: Fix resource leaks in for_each_available_child_of_node() loops

From: Lu Hongfei <luhongfei@...o.com>

[ Upstream commit 8f38f8fa7261819eb7d4fb369dc3bfab72259033 ]

Ensure child node references are decremented properly in the error path.

Signed-off-by: Lu Hongfei <luhongfei@...o.com>
Link: https://lore.kernel.org/r/20230525111705.3055-1-luhongfei@vivo.com
Signed-off-by: Lee Jones <lee@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 1c849814a4917..212df2e3d3502 100644
--- 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++)
-- 
2.39.2