linux-kernel - RE: [PATCH 1/2] ASoC: da7213: Delete an error message for a failed memory allocation in da7213_fw_to

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Date:   Fri, 24 Nov 2017 11:43:09 +0000
From:   Adam Thomson <Adam.Thomson.Opensource@...semi.com>
To:     Julia Lawall <julia.lawall@...6.fr>,
        Adam Thomson <Adam.Thomson.Opensource@...semi.com>
CC:     SF Markus Elfring <elfring@...rs.sourceforge.net>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "Support Opensource" <Support.Opensource@...semi.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, Takashi Iwai <tiwai@...e.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>
Subject: RE: [PATCH 1/2] ASoC: da7213: Delete an error message for a failed
 memory allocation in da7213_fw_to_pdata()

On 24 November 2017 11:33, Julia Lawall wrote:

> On Fri, 24 Nov 2017, Adam Thomson wrote:
> 
> > On 23 November 2017 17:33, SF Markus Elfring wrote:
> >
> > > From: Markus Elfring <elfring@...rs.sourceforge.net>
> > > Date: Thu, 23 Nov 2017 17:56:54 +0100
> > >
> > > Omit an extra message for a memory allocation failure in this function.
> >
> > I'm not sure this is an extra message. We don't return -ENOMEM as a result of
> > this operation and probe won't fail on this. So does devm_kzalloc() print error
> > messages?
> 
> Unless there is NO WARN, a backtrace will be generated in the out of
> memory case.
> 
> julia

Ok, fair enough. In which case:

Acked-by: Adam Thomson <Adam.Thomson.Opensource@...semi.com>

> 
> >
> > > This issue was detected by using the Coccinelle software.
> > >
> > > Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> > > ---
> > >  sound/soc/codecs/da7213.c | 4 +---
> > >  1 file changed, 1 insertion(+), 3 deletions(-)
> > >
> > > diff --git a/sound/soc/codecs/da7213.c b/sound/soc/codecs/da7213.c
> > > index 41d9b1da27c2..d1b77a0e3b74 100644
> > > --- a/sound/soc/codecs/da7213.c
> > > +++ b/sound/soc/codecs/da7213.c
> > > @@ -1654,10 +1654,8 @@ static struct da7213_platform_data
> > >  	u32 fw_val32;
> > >
> > >  	pdata = devm_kzalloc(codec->dev, sizeof(*pdata), GFP_KERNEL);
> > > -	if (!pdata) {
> > > -		dev_warn(codec->dev, "Failed to allocate memory for pdata\n");
> > > +	if (!pdata)
> > >  		return NULL;
> > > -	}
> > >
> > >  	if (device_property_read_u32(dev, "dlg,micbias1-lvl", &fw_val32) >= 0)
> > >  		pdata->micbias1_lvl = da7213_of_micbias_lvl(codec, fw_val32);
> > > --
> > > 2.15.0
> > N?????r??y??????X??ǧv???)޺{.n?????z?ޖ6?????)?????*¬
> jg??? ?????ݢj/???z?ޖ????ޙ????&?)ߡ?a???????G????? ??:+v???w????