linux-kernel - Re: [RFC PATCH 02/11] devfreq: exynos-bus: Extract exynos_bus_profile_init

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Date:   Thu, 25 Jul 2019 21:45:19 +0900
From:   Chanwoo Choi <cwchoi00@...il.com>
To:     Artur Świgoń <a.swigon@...tner.samsung.com>
Cc:     devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Linux PM list <linux-pm@...r.kernel.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>, inki.dae@...sung.com,
        Seung-Woo Kim <sw0312.kim@...sung.com>,
        georgi.djakov@...aro.org,
        Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [RFC PATCH 02/11] devfreq: exynos-bus: Extract exynos_bus_profile_init_passive()

2019년 7월 24일 (수) 오전 8:07, Artur Świgoń <a.swigon@...tner.samsung.com>님이 작성:
>
> This patch adds a new static function, exynos_bus_profile_init_passive(),
> extracted from exynos_bus_probe().
>
> Signed-off-by: Artur Świgoń <a.swigon@...tner.samsung.com>
> ---
>  drivers/devfreq/exynos-bus.c | 70 +++++++++++++++++++++---------------
>  1 file changed, 42 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
> index d8f1efaf2d49..cf6f6cbd0f55 100644
> --- a/drivers/devfreq/exynos-bus.c
> +++ b/drivers/devfreq/exynos-bus.c
> @@ -430,13 +430,51 @@ static int exynos_bus_profile_init(struct exynos_bus *bus,
>         return ret;
>  }
>
> +static int exynos_bus_profile_init_passive(struct exynos_bus *bus,
> +                                          struct devfreq_dev_profile *profile)
> +{
> +       struct device *dev = bus->dev;
> +       struct devfreq *parent_devfreq;
> +       struct devfreq_passive_data *passive_data;
> +       int ret = 0;
> +
> +       /* Initialize the struct profile and governor data for passive device */
> +       profile->target = exynos_bus_passive_target;
> +       profile->exit = exynos_bus_passive_exit;
> +
> +       /* Get the instance of parent devfreq device */
> +       parent_devfreq = devfreq_get_devfreq_by_phandle(dev, 0);
> +       if (IS_ERR(parent_devfreq)) {
> +               ret = -EPROBE_DEFER;
> +               goto err;
> +       }
> +
> +       passive_data = devm_kzalloc(dev, sizeof(*passive_data), GFP_KERNEL);
> +       if (!passive_data) {
> +               ret = -ENOMEM;
> +               goto err;
> +       }
> +       passive_data->parent = parent_devfreq;
> +
> +       /* Add devfreq device for exynos bus with passive governor */
> +       bus->devfreq = devm_devfreq_add_device(dev, profile, DEVFREQ_GOV_PASSIVE,
> +                                               passive_data);
> +       if (IS_ERR(bus->devfreq)) {
> +               dev_err(dev,
> +                       "failed to add devfreq dev with passive governor\n");
> +               ret = PTR_ERR(bus->devfreq);
> +               goto err;
> +       }
> +
> +err:
> +       return ret;
> +}
> +
>  static int exynos_bus_probe(struct platform_device *pdev)
>  {
>         struct device *dev = &pdev->dev;
>         struct device_node *np = dev->of_node, *node;
>         struct devfreq_dev_profile *profile;
> -       struct devfreq_passive_data *passive_data;
> -       struct devfreq *parent_devfreq;
>         struct exynos_bus *bus;
>         int ret, max_state;
>         unsigned long min_freq, max_freq;
> @@ -481,33 +519,9 @@ static int exynos_bus_probe(struct platform_device *pdev)
>
>         goto out;
>  passive:
> -       /* Initialize the struct profile and governor data for passive device */
> -       profile->target = exynos_bus_passive_target;
> -       profile->exit = exynos_bus_passive_exit;
> -
> -       /* Get the instance of parent devfreq device */
> -       parent_devfreq = devfreq_get_devfreq_by_phandle(dev, 0);
> -       if (IS_ERR(parent_devfreq)) {
> -               ret = -EPROBE_DEFER;
> +       ret = exynos_bus_profile_init_passive(bus, profile);
> +       if (ret < 0)
>                 goto err;
> -       }
> -
> -       passive_data = devm_kzalloc(dev, sizeof(*passive_data), GFP_KERNEL);
> -       if (!passive_data) {
> -               ret = -ENOMEM;
> -               goto err;
> -       }
> -       passive_data->parent = parent_devfreq;
> -
> -       /* Add devfreq device for exynos bus with passive governor */
> -       bus->devfreq = devm_devfreq_add_device(dev, profile, DEVFREQ_GOV_PASSIVE,
> -                                               passive_data);
> -       if (IS_ERR(bus->devfreq)) {
> -               dev_err(dev,
> -                       "failed to add devfreq dev with passive governor\n");
> -               ret = PTR_ERR(bus->devfreq);
> -               goto err;
> -       }
>
>  out:
>         max_state = bus->devfreq->profile->max_state;
> --
> 2.17.1
>

Actually, it is not necessary. It has no any benefit.
Please drop it as I commented on patch1.


--
Best Regards,
Chanwoo Choi