xtensa: xtfpga: Fix refcount leak bug in setup

commit 173940b3ae40114d4179c251a98ee039dc9cd5b3 upstream.

In machine_setup(), 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: <20220617115323.4046905-1-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/platforms/xtfpga/setup.c b/arch/xtensa/platforms/xtfpga/setup.c
index 538e674..c79c1d0 100644 (file)
--- a/arch/xtensa/platforms/xtfpga/setup.c
+++ b/arch/xtensa/platforms/xtfpga/setup.c
@@ -133,6 +133,7 @@ static int __init machine_setup(void)
 
        if ((eth = of_find_compatible_node(eth, NULL, "opencores,ethoc")))
                update_local_mac(eth);
+       of_node_put(eth);
        return 0;
 }
 arch_initcall(machine_setup);