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Subject[PATCH 4.4 003/241] ARM: exynos: Fix a leaked reference by adding missing of_node_put
Date
From: Wen Yang <wen.yang99@zte.com.cn>

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>

---
arch/arm/mach-exynos/firmware.c | 1 +
arch/arm/mach-exynos/suspend.c | 2 ++
2 files changed, 3 insertions(+)

--- a/arch/arm/mach-exynos/firmware.c
+++ b/arch/arm/mach-exynos/firmware.c
@@ -207,6 +207,7 @@ 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;
--- a/arch/arm/mach-exynos/suspend.c
+++ b/arch/arm/mach-exynos/suspend.c
@@ -725,8 +725,10 @@ 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pr_warn("Outdated DT detected, suspend/resume will NOT work\n");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;


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