linux-kernel - Re: [PATCH 2/2] PM / devfreq: exynos-bus: add missing exynos_bus_disable_edev in exynos_bus_profile

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Date:   Mon, 23 Dec 2019 02:01:28 +0900
From:   Chanwoo Choi <chanwoo@...nel.org>
To:     Yangtao Li <tiny.windzz@...il.com>
Cc:     Chanwoo Choi <cw00.choi@...sung.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Linux PM list <linux-pm@...r.kernel.org>,
        linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] PM / devfreq: exynos-bus: add missing
 exynos_bus_disable_edev in exynos_bus_profile_init

Hi,

Please use capital letter for the first char of patch title
and better to edit the patch title as following:
Actually, it is difficult to understand the role by only reading
the function name. It depends on only this driver.
So, better to edit it as following because devfreq-event
is standard name in linux kernel. I think it is easy to understand
what the patch does.

- PM / devfreq: exynos-bus: Disable the devfreq-event device when failed


2019년 12월 22일 (일) 오전 3:21, Yangtao Li <tiny.windzz@...il.com>님이 작성:
>
> The exynos_bus_profile_init process may fail, but the devfreq event device
> remains enabled. Call devfreq_event_disable_edev on the error return path.
>
> Signed-off-by: Yangtao Li <tiny.windzz@...il.com>
> ---
>  drivers/devfreq/exynos-bus.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
> index 7f5917d59072..5e54eaf3cfc6 100644
> --- a/drivers/devfreq/exynos-bus.c
> +++ b/drivers/devfreq/exynos-bus.c
> @@ -335,10 +335,14 @@ static int exynos_bus_profile_init(struct exynos_bus *bus,
>         ret = exynos_bus_set_event(bus);
>         if (ret < 0) {
>                 dev_err(dev, "failed to set event to devfreq-event devices\n");
> -               return ret;
> +               goto err_disable_edev;
>         }
>
>         return 0;
> +
> +err_disable_edev:

err_edev is enough instead of 'err_disable_edev'

> +       exynos_bus_disable_edev(bus);

exynos_bus_disable_edev() has return value for detecting the error.
Need to add following warning message.

if (ret < 0)
     dev_warn(dev, "failed to disable the devfreq-event devices\n");


> +       return ret;
>  }
>
>  static int exynos_bus_profile_init_passive(struct exynos_bus *bus,
> --
> 2.17.1
>


--
Best Regards,
Chanwoo Choi