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Subject: Re: [PATCH] regulator: pwm-regulator: Make use of the helper function
 dev_err_probe()
To:     Anand Moon <linux.amoon@gmail.com>,
        linux-arm-kernel@lists.infradead.org,
        linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org
Cc:     Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
        Liam Girdwood <lgirdwood@gmail.com>,
        Mark Brown <broonie@kernel.org>,
        Jon Hunter <jonathanh@nvidia.com>
References: <20210919211129.4364-1-linux.amoon@gmail.com>
From:   Neil Armstrong <narmstrong@baylibre.com>
Organization: Baylibre
Message-ID: <7dcee097-9119-1987-9bb5-777d541cc9f7@baylibre.com>
Date:   Mon, 20 Sep 2021 10:26:30 +0200
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On 19/09/2021 23:11, Anand Moon wrote:
> devm_regulator_register can return -EPROBE_DEFER if the
> regulator is not ready yet. Use dev_err_probe() for
> pwm regulator resources to indicate the deferral reason
> when waiting for the resource to come up.
> 
> Fixes: 0cd71b9a43ad ("regulator: pwm: Don't warn on probe deferral")
> 
> Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
> Signed-off-by: Anand Moon <linux.amoon@gmail.com>
> ---
>  drivers/regulator/pwm-regulator.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/regulator/pwm-regulator.c b/drivers/regulator/pwm-regulator.c
> index 7629476d94ae..451e57a739f8 100644
> --- a/drivers/regulator/pwm-regulator.c
> +++ b/drivers/regulator/pwm-regulator.c
> @@ -382,9 +382,9 @@ static int pwm_regulator_probe(struct platform_device *pdev)
>  					    &drvdata->desc, &config);
>  	if (IS_ERR(regulator)) {
>  		ret = PTR_ERR(regulator);
> -		dev_err(&pdev->dev, "Failed to register regulator %s: %d\n",
> -			drvdata->desc.name, ret);
> -		return ret;
> +		return dev_err_probe(&pdev->dev, ret,
> +				     "Failed to register regulator %s: %d\n",
> +				     drvdata->desc.name, ret);

No need to keep ret and print it since it will be printed by dev_err_probe, pass directly PTR_ERR(regulator) and drop the ": %d" from the error string.

Neil


>  	}
>  
>  	return 0;
>