linux-kernel - Re: [PATCH] cpuidle: Fix reference count on CPU node

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Message-ID: <66fc57ef.050a0220.27e956.af8d@mx.google.com>
Date: Tue, 01 Oct 2024 22:13:33 +0200
From: Miquel Sabaté Solà <mikisabate@...il.com>
To: rafael@...nel.org
Cc: daniel.lezcano@...aro.org,  linux-arm-msm@...r.kernel.org,
  linux-pm@...r.kernel.org,  linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cpuidle: Fix reference count on CPU node

On dt., de set. 17 2024, Miquel Sabaté Solà wrote:

> For the qcom-spm driver, an early return was not calling the proper
> of_node_put call for a previously acquired device node.
>
> Signed-off-by: Miquel Sabaté Solà <mikisabate@...il.com>
> ---
>  drivers/cpuidle/cpuidle-qcom-spm.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/cpuidle/cpuidle-qcom-spm.c b/drivers/cpuidle/cpuidle-qcom-spm.c
> index 1fc9968eae19..d3608f47d02b 100644
> --- a/drivers/cpuidle/cpuidle-qcom-spm.c
> +++ b/drivers/cpuidle/cpuidle-qcom-spm.c
> @@ -96,8 +96,10 @@ static int spm_cpuidle_register(struct device *cpuidle_dev, int cpu)
>  		return -ENODEV;
>  
>  	saw_node = of_parse_phandle(cpu_node, "qcom,saw", 0);
> -	if (!saw_node)
> +	if (!saw_node) {
> +		of_node_put(cpu_node);
>  		return -ENODEV;
> +	}
>  
>  	pdev = of_find_device_by_node(saw_node);
>  	of_node_put(saw_node);

Gently ping for a fix in the same spirit as [1].

Could you take a look whenever you have some time?

Thanks!
Miquel

[1] https://lore.kernel.org/all/20240917134246.584026-1-mikisabate@gmail.com/

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