linux-kernel - Re: [PATCH] devfreq: rk3399_dmc: Simplify with dev_err

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Message-ID: <CAGTfZH3+mxBXzVp5Wz=F6nbx3bfubrmJozVzVdt8s1e45WQOqg@mail.gmail.com>
Date:   Sat, 29 Aug 2020 22:10:04 +0900
From:   Chanwoo Choi <chanwoo@...nel.org>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Linux PM list <linux-pm@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] devfreq: rk3399_dmc: Simplify with dev_err_probe()

On Sat, Aug 29, 2020 at 12:31 AM Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> Common pattern of handling deferred probe can be simplified with
> dev_err_probe().  Less code and the error value gets printed.
>
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
> ---
>  drivers/devfreq/rk3399_dmc.c | 20 ++++++--------------
>  1 file changed, 6 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/devfreq/rk3399_dmc.c b/drivers/devfreq/rk3399_dmc.c
> index 027769e39f9b..35b3542f1f7b 100644
> --- a/drivers/devfreq/rk3399_dmc.c
> +++ b/drivers/devfreq/rk3399_dmc.c
> @@ -324,22 +324,14 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
>         mutex_init(&data->lock);
>
>         data->vdd_center = devm_regulator_get(dev, "center");
> -       if (IS_ERR(data->vdd_center)) {
> -               if (PTR_ERR(data->vdd_center) == -EPROBE_DEFER)
> -                       return -EPROBE_DEFER;
> -
> -               dev_err(dev, "Cannot get the regulator \"center\"\n");
> -               return PTR_ERR(data->vdd_center);
> -       }
> +       if (IS_ERR(data->vdd_center))
> +               return dev_err_probe(dev, PTR_ERR(data->vdd_center),
> +                                    "Cannot get the regulator \"center\"\n");
>
>         data->dmc_clk = devm_clk_get(dev, "dmc_clk");
> -       if (IS_ERR(data->dmc_clk)) {
> -               if (PTR_ERR(data->dmc_clk) == -EPROBE_DEFER)
> -                       return -EPROBE_DEFER;
> -
> -               dev_err(dev, "Cannot get the clk dmc_clk\n");
> -               return PTR_ERR(data->dmc_clk);
> -       }
> +       if (IS_ERR(data->dmc_clk))
> +               return dev_err_probe(dev, PTR_ERR(data->dmc_clk),
> +                                    "Cannot get the clk dmc_clk\n");
>
>         data->edev = devfreq_event_get_edev_by_phandle(dev, 0);
>         if (IS_ERR(data->edev))
> --
> 2.17.1
>

Applied it. Thanks.

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics