[PATCH 10/12] cpufreq: ap806: add missing of_node_put after of_device_is_available

Julia Lawall
2019-02-23T13:59:32Z

Add an of_node_put when a tested device node is not available.

The semantic patch that fixes this problem is as follows
(http://coccinelle.lip6.fr):

// <smpl>
@@
identifier f;
local idexpression e;
expression x;
@@

e = f(...);
... when != of_node_put(e)
when != x = e
when != e = x
when any
if (<+...of_device_is_available(e)...+>) {
... when != of_node_put(e)
(
return e;
|
+ of_node_put(e);
return ...;
)
}
// </smpl>

Fixes: f525a670533d9 ("cpufreq: ap806: add cpufreq driver for Armada 8K")
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
drivers/cpufreq/armada-8k-cpufreq.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff -u -p a/drivers/cpufreq/armada-8k-cpufreq.c b/drivers/cpufreq/armada-8k-cpufreq.c
--- a/drivers/cpufreq/armada-8k-cpufreq.c
+++ b/drivers/cpufreq/armada-8k-cpufreq.c
@@ -128,8 +128,10 @@ static int __init armada_8k_cpufreq_init
struct cpumask cpus;

node = of_find_compatible_node(NULL, NULL, "marvell,ap806-cpu-clock");
- if (!node || !of_device_is_available(node))
+ if (!node || !of_device_is_available(node)) {
+ of_node_put(node);
return -ENODEV;
+ }

nb_cpus = num_possible_cpus();
freq_tables = kcalloc(nb_cpus, sizeof(*freq_tables), GFP_KERNEL);