linux-kernel - Re: [PATCH v2 1/6] ASoC: dwc: Remove unnecessary debug messages and tests

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Date:	Fri, 12 Dec 2014 02:06:12 -0800
From:	Joe Perches <joe@...ches.com>
To:	Andrew Jackson <Andrew.Jackson@....com>
Cc:	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Rajeev Kumar <rajeevkumar.linux@...il.com>,
	Liviu Dudau <Liviu.Dudau@....com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Arnd Bergmann <arnd@...db.de>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/6] ASoC: dwc: Remove unnecessary debug messages and
 tests

On Fri, 2014-12-12 at 09:39 +0000, Andrew Jackson wrote:
> On 12/12/14 09:31, Joe Perches wrote:
> > On Fri, 2014-12-12 at 09:25 +0000, Andrew Jackson wrote:
> >> The devm_XXX allocation functions print a message on failure,
> >> so additional messages are not required.
> > []
> >> diff --git a/sound/soc/dwc/designware_i2s.c b/sound/soc/dwc/designware_i2s.c
> > []
> >> @@ -345,26 +345,17 @@ static int dw_i2s_probe(struct platform_device *pdev)
> >>  	}
> >>  
> >>  	dw_i2s_dai = devm_kzalloc(&pdev->dev, sizeof(*dw_i2s_dai), GFP_KERNEL);
> >> -	if (!dw_i2s_dai) {
> >> -		dev_err(&pdev->dev, "mem allocation failed for dai driver\n");
> >> +	if (!dw_i2s_dai)
> >>  		return -ENOMEM;
> >> -	}
> > 
> > ok.
> >  
> >>  	dw_i2s_dai->ops = &dw_i2s_dai_ops;
> >>  	dw_i2s_dai->suspend = dw_i2s_suspend;
> >>  	dw_i2s_dai->resume = dw_i2s_resume;
> >>  
> >>  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> >> -	if (!res) {
> >> -		dev_err(&pdev->dev, "no i2s resource defined\n");
> >> -		return -ENODEV;
> >> -	}
> >> -
> > 
> > Why delete this?
> 
> Lars-Peter said that it was unnecessary: see <http://lists.infradead.org/pipermail/linux-arm-kernel/2014-December/308416.html>.
> > 
> >>  	dev->i2s_base = devm_ioremap_resource(&pdev->dev, res);
> >> -	if (IS_ERR(dev->i2s_base)) {
> >> -		dev_err(&pdev->dev, "ioremap fail for i2s_region\n");
> >> +	if (IS_ERR(dev->i2s_base))
> >>  		return PTR_ERR(dev->i2s_base);
> >> -	}
> > 
> > or this?
> 
> Ditto

OK, but your commit message doesn't match the changes.

These messages are redundant not what most consider
debugging messages (ie: emitted at KERN_DEBUG).

The 2nd one isn't a devm_<foo> function and the last
one isn't an allocation.



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