ARM: exynos: Fix refcount leak in exynos_map_pmu

BugLink: https://bugs.launchpad.net/bugs/1986718
commit c4c79525042a4a7df96b73477feaf232fe44ae81 upstream.

of_find_matching_node() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.
of_node_put() checks null pointer.

Fixes: fce9e5bb2526 ("ARM: EXYNOS: Add support for mapping PMU base address via DT")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220523145513.12341-1-linmq006@gmail.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
index 8b48326be9fd57f46597d203ed1ea872ee1eefe9..51a247ca4da8c86244247431ee4f16e6a7da4418 100644 (file)
--- a/arch/arm/mach-exynos/exynos.c
+++ b/arch/arm/mach-exynos/exynos.c
@@ -149,6 +149,7 @@ static void exynos_map_pmu(void)
        np = of_find_matching_node(NULL, exynos_dt_pmu_match);
        if (np)
                pmu_base_addr = of_iomap(np, 0);
+       of_node_put(np);
 }
 
 static void __init exynos_init_irq(void)