linux-kernel - Re: [PATCH 8/9] regulator: bd71837: BD71837 PMIC regulator driver

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Date:   Fri, 25 May 2018 14:32:40 +0300
From:   Matti Vaittinen <mazziesaccount@...il.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Matti Vaittinen <mazziesaccount@...il.com>,
        "Vaittinen, Matti" <Matti.Vaittinen@...rohmeurope.com>,
        "mturquette@...libre.com" <mturquette@...libre.com>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "lee.jones@...aro.org" <lee.jones@...aro.org>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Mutanen, Mikko" <Mikko.Mutanen@...rohmeurope.com>,
        "Haikola, Heikki" <Heikki.Haikola@...rohmeurope.com>
Subject: Re: [PATCH 8/9] regulator: bd71837: BD71837 PMIC regulator driver

On Fri, May 25, 2018 at 11:14:23AM +0100, Mark Brown wrote:
> On Fri, May 25, 2018 at 10:22:53AM +0300, Matti Vaittinen wrote:
> > On Thu, May 24, 2018 at 05:51:27PM +0000, Vaittinen, Matti wrote:
> 
> > > > devm_regulator_regster()
> 
> > > Makes sense. Thanks
> 
> > I was going to do 
> 
> > -       pmic = kzalloc(sizeof(struct bd71837_pmic), GFP_KERNEL);
> > +       pmic = devm_kzalloc(&pdev->dev, sizeof(struct bd71837_pmic),
> > +                           GFP_KERNEL);
> 
> > and
> 
> > -               rdev = regulator_register(desc, &config);
> > +               rdev = devm_regulator_register(&pdev->dev, desc, &config);
> > 
> > but is there now a race regarding freeing the pmic structure and
> > unregistering the regulator?
> 
> Why?  devm_ stuff gets unwound in the opposite order to the order in
> which it was allocated.
Allright. Then there's no problems. I'll do the change.