csky: Don't leak device tree node reference

TinyWindzz · guoren83 · commit 398539dd6934 · 2018-12-30T20:25:39.000+08:00
of_find_node_by_type() acquires a reference to the node returned by it
and that reference needs to be dropped by its caller. setup_smp()
doesn't do that, so fix it by converting to for_each_of_cpu_node().

Signed-off-by: Yangtao Li &lt;tiny.windzz@gmail.com&gt;
Signed-off-by: Guo Ren &lt;guoren@kernel.org&gt;
diff --git a/arch/csky/kernel/smp.c b/arch/csky/kernel/smp.c
@@ -138,7 +138,7 @@ void __init setup_smp(void)
 	struct device_node *node = NULL;
 	int cpu;
 
-	while ((node = of_find_node_by_type(node, "cpu"))) {
+	for_each_of_cpu_node(node) {
 		if (!of_device_is_available(node))
 			continue;
 
