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 (file)
--- 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;