From f44b799603a9b5d2e375b0b2d54dd0b791eddfc2 Mon Sep 17 00:00:00 2001
From: Miaoqian Lin <linmq006@gmail.com>
Date: Thu, 26 May 2022 12:28:56 +0400
Subject: [PATCH] PM / devfreq: exynos-ppmu: Fix refcount leak in of_get_devfreq_events
Git-commit: f44b799603a9b5d2e375b0b2d54dd0b791eddfc2
Patch-mainline: v5.19-rc5
References: git-fixes
of_get_child_by_name() returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
This function only calls of_node_put() in normal path,
missing it in error paths.
Add missing of_node_put() to avoid refcount leak.
Fixes: f262f28c1470 ("PM / devfreq: event: Add devfreq_event class")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/devfreq/event/exynos-ppmu.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/devfreq/event/exynos-ppmu.c b/drivers/devfreq/event/exynos-ppmu.c
index 9b849d781116..a443e7c42daf 100644
--- a/drivers/devfreq/event/exynos-ppmu.c
+++ b/drivers/devfreq/event/exynos-ppmu.c
@@ -519,15 +519,19 @@ static int of_get_devfreq_events(struct device_node *np,
count = of_get_child_count(events_np);
desc = devm_kcalloc(dev, count, sizeof(*desc), GFP_KERNEL);
- if (!desc)
+ if (!desc) {
+ of_node_put(events_np);
return -ENOMEM;
+ }
info->num_events = count;
of_id = of_match_device(exynos_ppmu_id_match, dev);
if (of_id)
info->ppmu_type = (enum exynos_ppmu_type)of_id->data;
- else
+ else {
+ of_node_put(events_np);
return -EINVAL;
+ }
j = 0;
for_each_child_of_node(events_np, node) {
--
2.35.3