ARM: exynos: Fix a leaked reference by adding missing of_node_put

commit 629266bf7229cd6a550075f5961f95607b823b59 upstream.

The call to of_get_next_child returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with warnings like:
    arch/arm/mach-exynos/firmware.c:201:2-8: ERROR: missing of_node_put;
        acquired a node pointer with refcount incremented on line 193,
        but without a corresponding object release within this function.

Cc: stable@vger.kernel.org
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/arm/mach-exynos/firmware.c b/arch/arm/mach-exynos/firmware.c
index be1f20f..fbe1db6 100644 (file)
--- a/arch/arm/mach-exynos/firmware.c
+++ b/arch/arm/mach-exynos/firmware.c
@@ -196,6 +196,7 @@ void __init exynos_firmware_init(void)
                return;
 
        addr = of_get_address(nd, 0, NULL, NULL);
+       of_node_put(nd);
        if (!addr) {
                pr_err("%s: No address specified.\n", __func__);
                return;

diff --git a/arch/arm/mach-exynos/suspend.c b/arch/arm/mach-exynos/suspend.c
index 7ead3ac..b1fe53e 100644 (file)
--- a/arch/arm/mach-exynos/suspend.c
+++ b/arch/arm/mach-exynos/suspend.c
@@ -639,8 +639,10 @@ void __init exynos_pm_init(void)
 
        if (WARN_ON(!of_find_property(np, "interrupt-controller", NULL))) {
                pr_warn("Outdated DT detected, suspend/resume will NOT work\n");
+               of_node_put(np);
                return;
        }
+       of_node_put(np);
 
        pm_data = (const struct exynos_pm_data *) match->data;