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

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Message-ID: <2d38d2f242bbcce452f6c29f4ee79aa9c5703b7d.camel@linaro.org>
Date: Tue, 18 Mar 2025 20:37:04 +0000
From: André Draszik <andre.draszik@...aro.org>
To: Krzysztof Kozlowski <krzk@...nel.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

Hi Krzysztof,

On Tue, 2025-03-18 at 20:23 +0100, Krzysztof Kozlowski wrote:
> 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.

This was part of some patches converting to scoped cleanup, and
there it was shorter. Shouldn't have taken this change out of
that context...

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

True. dev_err_probe is nice though in that it gives us unified
error messages.

Happy to drop for now.

Cheers,
A.