linux-kernel - Re: [PATCH] ASoC: sgtl5000: Use devm

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Date:	Mon, 7 Jul 2014 16:58:24 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Mark Brown <broonie@...nel.org>
cc:	Himangi Saraogi <himangi774@...il.com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
	julia.lawall@...6.fr
Subject: Re: [PATCH] ASoC: sgtl5000: Use devm_ functions



On Mon, 7 Jul 2014, Mark Brown wrote:

> On Sun, Jul 06, 2014 at 12:38:00PM +0530, Himangi Saraogi wrote:
>
> > diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c
> > index 249fadb..0efd6d6 100644
> > --- a/sound/soc/codecs/sgtl5000.c
> > +++ b/sound/soc/codecs/sgtl5000.c
> > @@ -841,14 +841,15 @@ static int ldo_regulator_register(struct snd_soc_codec *codec,
> >  	struct sgtl5000_priv *sgtl5000 = snd_soc_codec_get_drvdata(codec);
> >  	struct regulator_config config = { };
> >
> > -	ldo = kzalloc(sizeof(struct ldo_regulator), GFP_KERNEL);
> > +	ldo = devm_kzalloc(codec->dev, sizeof(struct ldo_regulator),
> > +			   GFP_KERNEL);
>
> You're using the managed functions within the ASoC level probe functions
> which doesn't work - devm_ is only usable as part of the driver model
> binding and unbinding.  All this resource allocation needs to be moved
> into the device level probe (which is a better thing anyway) before it
> is converted to devm.

Nevertheless, there is already a call to devm_regulator_bulk_get in
sgtl5000_enable_regulators which calls sgtl5000_replace_vddd_with_ldo
which calls ldo_regulator_register.  That call was introduced by

commit 63e54cd9caa3ce03635810608519e2b37d8bc706
Author: Fabio Estevam <fabio.estevam@...escale.com>
Date:   Thu Apr 24 14:13:08 2014 -0300

It seems that that patch should be reverted?

julia
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