linux-kernel - Re: [PATCH 3/3] firmware: exynos-acpm: convert to dev_err

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Message-ID: <801a9754-cd57-42c6-9569-16d9a99bfed9@kernel.org>
Date: Tue, 18 Mar 2025 20:23:44 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: André Draszik <andre.draszik@...aro.org>,
 Tudor Ambarus <tudor.ambarus@...aro.org>,
 Alim Akhtar <alim.akhtar@...sung.com>
Cc: Peter Griffin <peter.griffin@...aro.org>,
 Will McVicker <willmcvicker@...gle.com>, kernel-team@...roid.com,
 linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org,
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH 3/3] firmware: exynos-acpm: convert to dev_err_probe() in
 client API

On 14/03/2025 17:40, André Draszik wrote:
> dev_err_probe() exists to simplify code and unify error messages by
> using its message template.
> 
> Convert the remaining dev_err() in acpm_get_by_phandle() to
> dev_err_probe().
> 
> Signed-off-by: André Draszik <andre.draszik@...aro.org>
> ---
>  drivers/firmware/samsung/exynos-acpm.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/firmware/samsung/exynos-acpm.c b/drivers/firmware/samsung/exynos-acpm.c
> index 48f1e3cacaa709ae703115169df138b659ddae44..03f907a95c6acd66d89cd8af2f52e7c6dadf492a 100644
> --- a/drivers/firmware/samsung/exynos-acpm.c
> +++ b/drivers/firmware/samsung/exynos-acpm.c
> @@ -701,12 +701,14 @@ static const struct acpm_handle *acpm_get_by_phandle(struct device *dev,
>  
>  	link = device_link_add(dev, &pdev->dev, DL_FLAG_AUTOREMOVE_SUPPLIER);
>  	if (!link) {
> -		dev_err(&pdev->dev,
> -			"Failed to create device link to consumer %s.\n",
> -			dev_name(dev));
> +		int ret = -EINVAL;
> +
> +		dev_err_probe(&pdev->dev, ret,
> +			      "Failed to create device link to consumer %s.\n",
> +			      dev_name(dev));

I do not see how it is simpler. Three lines (statement) is now 5 lines
with two statements.

What's more important, dev_err_probe is supposed to be used only in
probe context, while this could be called in other contexts.

Best regards,
Krzysztof