linux-kernel - Re: [PATCH v3] cpufreq: kryo: Add module remove and exit

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Message-ID: <20180618045550.sasilydvnlsmxzpk@vireshk-i7>
Date:   Mon, 18 Jun 2018 10:25:50 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     ilia.lin@...il.com
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] cpufreq: kryo: Add module remove and exit

On 17-06-18, 22:01, ilia.lin@...il.com wrote:
> From: Ilia Lin <ilia.lin@...il.com>
> 
> Add device remove and module exit code to make the driver
> functioning as a loadable module.
> 
> Fixes: ac28927659be (cpufreq: kryo: allow building as a loadable module)
> Signed-off-by: Ilia Lin <ilia.lin@...il.com>
> ---
>  drivers/cpufreq/qcom-cpufreq-kryo.c | 22 +++++++++++++++++++---
>  1 file changed, 19 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/cpufreq/qcom-cpufreq-kryo.c b/drivers/cpufreq/qcom-cpufreq-kryo.c
> index 74b9b93d511b..01bddacf5c3b 100644
> --- a/drivers/cpufreq/qcom-cpufreq-kryo.c
> +++ b/drivers/cpufreq/qcom-cpufreq-kryo.c
> @@ -42,6 +42,8 @@ enum _msm8996_version {
>  	NUM_OF_MSM8996_VERSIONS,
>  };
>  
> +struct platform_device *cpufreq_dt_pdev, *kryo_cpufreq_pdev;
> +
>  static enum _msm8996_version __init qcom_cpufreq_kryo_get_msm_id(void)
>  {
>  	size_t len;
> @@ -74,7 +76,6 @@ static enum _msm8996_version __init qcom_cpufreq_kryo_get_msm_id(void)
>  static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
>  {
>  	struct opp_table *opp_tables[NR_CPUS] = {0};
> -	struct platform_device *cpufreq_dt_pdev;
>  	enum _msm8996_version msm8996_version;
>  	struct nvmem_cell *speedbin_nvmem;
>  	struct device_node *np;
> @@ -165,8 +166,15 @@ static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
>  	return ret;
>  }
>  
> +static int qcom_cpufreq_kryo_remove(struct platform_device *pdev)
> +{
> +	platform_device_unregister(cpufreq_dt_pdev);
> +	return 0;
> +}
> +
>  static struct platform_driver qcom_cpufreq_kryo_driver = {
>  	.probe = qcom_cpufreq_kryo_probe,
> +	.remove = qcom_cpufreq_kryo_remove,
>  	.driver = {
>  		.name = "qcom-cpufreq-kryo",
>  	},
> @@ -201,8 +209,9 @@ static int __init qcom_cpufreq_kryo_init(void)
>  	if (unlikely(ret < 0))
>  		return ret;
>  
> -	ret = PTR_ERR_OR_ZERO(platform_device_register_simple(
> -		"qcom-cpufreq-kryo", -1, NULL, 0));
> +	kryo_cpufreq_pdev = platform_device_register_simple(
> +		"qcom-cpufreq-kryo", -1, NULL, 0);
> +	ret = PTR_ERR_OR_ZERO(kryo_cpufreq_pdev);
>  	if (0 == ret)
>  		return 0;
>  
> @@ -211,5 +220,12 @@ static int __init qcom_cpufreq_kryo_init(void)
>  }
>  module_init(qcom_cpufreq_kryo_init);
>  
> +static void __init qcom_cpufreq_kryo_exit(void)
> +{
> +	platform_device_unregister(kryo_cpufreq_pdev);
> +	platform_driver_unregister(&qcom_cpufreq_kryo_driver);
> +}
> +module_exit(qcom_cpufreq_kryo_exit);
> +
>  MODULE_DESCRIPTION("Qualcomm Technologies, Inc. Kryo CPUfreq driver");
>  MODULE_LICENSE("GPL v2");

Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

-- 
viresh