From: Yangtao Li <tiny.windzz@gmail.com>
To: lorenzo.pieralisi@arm.com, daniel.lezcano@linaro.org, rjw@rjwysocki.net
Cc: Yangtao Li <tiny.windzz@gmail.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org
Subject: [PATCH v4] cpuidle: big.LITTLE: fix refcount leak
Date: Mon, 10 Dec 2018 11:26:41 -0500 [thread overview]
Message-ID: <20181210162641.21029-1-tiny.windzz@gmail.com> (raw)
of_find_node_by_path() acquires a reference to the node
returned by it and that reference needs to be dropped by its caller.
bl_idle_init() doesn't do that, so fix it.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
---
changes in v4:
-update tile
-refactor code,suggested by Daniel
---
drivers/cpuidle/cpuidle-big_little.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/cpuidle/cpuidle-big_little.c b/drivers/cpuidle/cpuidle-big_little.c
index db2ede565f1a..b44476a1b7ad 100644
--- a/drivers/cpuidle/cpuidle-big_little.c
+++ b/drivers/cpuidle/cpuidle-big_little.c
@@ -167,6 +167,7 @@ static int __init bl_idle_init(void)
{
int ret;
struct device_node *root = of_find_node_by_path("/");
+ const struct of_device_id *match_id;
if (!root)
return -ENODEV;
@@ -174,7 +175,11 @@ static int __init bl_idle_init(void)
/*
* Initialize the driver just for a compliant set of machines
*/
- if (!of_match_node(compatible_machine_match, root))
+ match_id = of_match_node(compatible_machine_match, root);
+
+ of_node_put(root);
+
+ if (!match_id)
return -ENODEV;
if (!mcpm_is_available())
--
2.17.0
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next reply other threads:[~2018-12-10 16:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-10 16:26 Yangtao Li [this message]
2018-12-10 17:00 ` [PATCH v4] cpuidle: big.LITTLE: fix refcount leak Daniel Lezcano
2018-12-17 11:42 ` Rafael J. Wysocki
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