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Subject[PATCH 2/3] firmware: psci: fix leaked of_node references
Date
The call to of_find_matching_node_and_match returns a node pointer
with refcount incremented thus it must be explicitly decremented
after the last usage.

672 int __init psci_dt_init(void)
673 {
674 struct device_node *np;
...
678 np = of_find_matching_node_and_match(...);
679
680 if (!np || !of_device_is_available(np))
682 return -ENODEV; ---> leaked here
...
686 return init_fn(np); ---> released here
687 }

Detected by using coccinelle.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
drivers/firmware/psci.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/psci.c b/drivers/firmware/psci.c
index c80ec1d..e4143f8 100644
--- a/drivers/firmware/psci.c
+++ b/drivers/firmware/psci.c
@@ -677,8 +677,10 @@ int __init psci_dt_init(void)

np = of_find_matching_node_and_match(NULL, psci_of_match, &matched_np);

- if (!np || !of_device_is_available(np))
+ if (!np || !of_device_is_available(np)) {
+ of_node_put(np);
return -ENODEV;
+ }

init_fn = (psci_initcall_t)matched_np->data;
return init_fn(np);
--
2.9.5
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