[PATCH 07/60] arm64: cpu_ops: fix a leaked reference by adding missing of_node_put

From: Jonathan Cameron
Date: Wed May 15 2019 - 05:20:03 EST

From: Wen Yang <wen.yang99@xxxxxxxxxx>

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

Detected by coccinelle with the following warnings:
./arch/arm64/kernel/cpu_ops.c:102:1-7: ERROR: missing of_node_put;
acquired a node pointer with refcount incremented on line 69, but
without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@xxxxxxxxxx>
Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
arch/arm64/kernel/cpu_ops.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/arm64/kernel/cpu_ops.c b/arch/arm64/kernel/cpu_ops.c
index ea001241bdd47..00f8b8612b69f 100644
--- a/arch/arm64/kernel/cpu_ops.c
+++ b/arch/arm64/kernel/cpu_ops.c
@@ -85,6 +85,7 @@ static const char *__init cpu_read_enable_method(int cpu)
pr_err("%pOF: missing enable-method property\n",
+ of_node_put(dn);
} else {
enable_method = acpi_get_enable_method(cpu);
if (!enable_method) {