cpufreq: dt: call of_node_put() before error out

If of_match_node() fails, this init function bails out without
calling of_node_put().

Also change of_node_put(of_root) to of_node_put(np); both of them
hold the same pointer, but it seems better to call of_node_put()
against the node returned by of_find_node_by_path().

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c
index 3646b14..0bb44d5 100644 (file)
--- a/drivers/cpufreq/cpufreq-dt-platdev.c
+++ b/drivers/cpufreq/cpufreq-dt-platdev.c
@@ -79,15 +79,16 @@ static const struct of_device_id machines[] __initconst = {
 static int __init cpufreq_dt_platdev_init(void)
 {
        struct device_node *np = of_find_node_by_path("/");
+       const struct of_device_id *match;
 
        if (!np)
                return -ENODEV;
 
-       if (!of_match_node(machines, np))
+       match = of_match_node(machines, np);
+       of_node_put(np);
+       if (!match)
                return -ENODEV;
 
-       of_node_put(of_root);
-
        return PTR_ERR_OR_ZERO(platform_device_register_simple("cpufreq-dt", -1,
                                                               NULL, 0));
 }