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SubjectRe: [PATCH v4] cpuidle: big.LITTLE: fix refcount leak
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On 10/12/2018 17:26, Yangtao Li wrote:
> 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>

Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>

> ---
> 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())
>


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