From: Liang He <windhl@126.com>
Date: Fri, 17 Jun 2022 12:44:32 +0000 (+0800)
Subject: xtensa: Fix refcount leak bug in time.c
X-Git-Tag: v5.15.73~2747
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0dcc1dd8a5dd9240639f1051dfaa2dffc9fbbde5;p=platform%2Fkernel%2Flinux-rpi.git

xtensa: Fix refcount leak bug in time.c

commit a0117dc956429f2ede17b323046e1968d1849150 upstream.

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.

Cc: stable@vger.kernel.org
Signed-off-by: Liang He <windhl@126.com>
Message-Id: <20220617124432.4049006-1-windhl@126.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/xtensa/kernel/time.c b/arch/xtensa/kernel/time.c
index e8ceb15..16b8a62 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;