linux-kernel - [PATCH] xtensa: kernel: Fix refcount leak bug in time.c

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Message-Id: <20220617124432.4049006-1-windhl@126.com>
Date:   Fri, 17 Jun 2022 20:44:32 +0800
From:   Liang He <windhl@....com>
To:     chris@...kel.net, jcmvbkbc@...il.com
Cc:     windhl@....com, linux-xtensa@...ux-xtensa.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] xtensa: kernel: Fix refcount leak bug in time.c

In calibrate_ccount(), of_find_compatible_node() will return a node
pointer with refcount incremented. We should use of_node_put() when
it is not used anymore.

Signed-off-by: Liang He <windhl@....com>
---
 arch/xtensa/kernel/time.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/xtensa/kernel/time.c b/arch/xtensa/kernel/time.c
index e8ceb1528608..16b8a6273772 100644
--- a/arch/xtensa/kernel/time.c
+++ b/arch/xtensa/kernel/time.c
@@ -154,6 +154,7 @@ static void __init calibrate_ccount(void)
 	cpu = of_find_compatible_node(NULL, NULL, "cdns,xtensa-cpu");
 	if (cpu) {
 		clk = of_clk_get(cpu, 0);
+		of_node_put(cpu);
 		if (!IS_ERR(clk)) {
 			ccount_freq = clk_get_rate(clk);
 			return;
-- 
2.25.1