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Subject[PATCH] ARM: add missing of_node_put()
 The call to of_find_compatible_node() returns a node pointer with refcount
incremented thus it must be explicitly decremented here after the last
usage. (see drivers/of/base.c:of_find_compatible_node())

Signed-off-by: Nicholas Mc Guire <>

Problem located with an experimental coccinelle script

Patch was compile tested with: axm55xx_defconfig
(with some sparse warnings - not related to the proposed change though)

Patch is against 4.17.0 (localversion-next is next-20180614)

arch/arm/mach-axxia/platsmp.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-axxia/platsmp.c b/arch/arm/mach-axxia/platsmp.c
index 502e3df..c706a11 100644
--- a/arch/arm/mach-axxia/platsmp.c
+++ b/arch/arm/mach-axxia/platsmp.c
@@ -40,10 +40,11 @@ static int axxia_boot_secondary(unsigned int cpu, struct task_struct *idle)
syscon_np = of_find_compatible_node(NULL, NULL, "lsi,axxia-syscon");
if (!syscon_np)
return -ENOENT;

syscon = of_iomap(syscon_np, 0);
+ of_node_put(syscon_np);
if (!syscon)
return -ENOMEM;

tmp = readl(syscon + SC_RST_CPU_HOLD);
writel(0xab, syscon + SC_CRIT_WRITE_KEY);
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