linux-kernel - Re: [PATCH 5/6] devfreq: rk3399_dmc: do not print error when get supply and clk defer.

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Message-ID: <CAPDyKFpQUFSoUC=FjAjfk5An0yCKWEcwjrBxqXYv8GakvWe4mA@mail.gmail.com>
Date:   Mon, 23 Apr 2018 12:44:52 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Enric Balletbo i Serra <enric.balletbo@...labora.com>
Cc:     Myungjoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        Heiko Stuebner <heiko@...ech.de>,
        Linux PM <linux-pm@...r.kernel.org>,
        Derek Basehore <dbasehore@...omium.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Doug Anderson <dianders@...gle.com>, groek@...gle.com,
        kernel@...labora.com, Lin Huang <hl@...k-chips.com>,
        Chanwoo Choi <cw00.choi@...sung.com>
Subject: Re: [PATCH 5/6] devfreq: rk3399_dmc: do not print error when get
 supply and clk defer.

On 19 April 2018 at 12:40, Enric Balletbo i Serra
<enric.balletbo@...labora.com> wrote:
> From: Lin Huang <hl@...k-chips.com>
>
> We just return -EPROBE_DEFER error code to caller and do not
> print error message when try to get center logic regulator
> and DMC clock defer.
>
> Signed-off-by: Lin Huang <hl@...k-chips.com>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> ---
>
>  drivers/devfreq/rk3399_dmc.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/drivers/devfreq/rk3399_dmc.c b/drivers/devfreq/rk3399_dmc.c
> index 44a379657cd5..5bfca028eaaf 100644
> --- a/drivers/devfreq/rk3399_dmc.c
> +++ b/drivers/devfreq/rk3399_dmc.c
> @@ -308,12 +308,18 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
>
>         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");

Doesn't the clock core already print an error message for this?

Maybe a better way is simply to drop the printing instead of trying to
have a special case for it?

>                 return PTR_ERR(data->vdd_center);
>         }
>
>         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);
>         };
> --
> 2.17.0
>

Kind regards
Uffe