linux-kernel - RE: [PATCH 08/21] pinctrl: samsung: Use scope based of_node

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Message-ID:
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Date: Wed, 1 May 2024 23:25:25 +0000
From: Peng Fan <peng.fan@....com>
To: Krzysztof Kozlowski <krzk@...nel.org>, "Peng Fan (OSS)"
	<peng.fan@....nxp.com>, Linus Walleij <linus.walleij@...aro.org>, Thierry
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	Matthias Brugger <mbrugger@...e.com>, "Ghennadi Procopciuc (OSS)"
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Subject: RE: [PATCH 08/21] pinctrl: samsung: Use scope based of_node_put()
 cleanups

> Subject: Re: [PATCH 08/21] pinctrl: samsung: Use scope based of_node_put()
> cleanups
> 
> On 01/05/2024 14:56, Peng Fan (OSS) wrote:
> > From: Peng Fan <peng.fan@....com>
> >
> > Use scope based of_node_put() cleanup to simplify code.
> >
> > Signed-off-by: Peng Fan <peng.fan@....com>
> > ---
> >  drivers/pinctrl/samsung/pinctrl-exynos-arm.c |  3 +--
> >  drivers/pinctrl/samsung/pinctrl-exynos.c     | 16 ++++------------
> >  drivers/pinctrl/samsung/pinctrl-s3c64xx.c    |  8 ++------
> >  drivers/pinctrl/samsung/pinctrl-samsung.c    | 26 +++++++-------------------
> >  4 files changed, 14 insertions(+), 39 deletions(-)
> >
> > diff --git a/drivers/pinctrl/samsung/pinctrl-exynos-arm.c
> > b/drivers/pinctrl/samsung/pinctrl-exynos-arm.c
> > index 85ddf49a5188..9a57b3ceb536 100644
> > --- a/drivers/pinctrl/samsung/pinctrl-exynos-arm.c
> > +++ b/drivers/pinctrl/samsung/pinctrl-exynos-arm.c
> > @@ -56,7 +56,7 @@ s5pv210_retention_init(struct
> samsung_pinctrl_drv_data *drvdata,
> >  		       const struct samsung_retention_data *data)  {
> >  	struct samsung_retention_ctrl *ctrl;
> > -	struct device_node *np;
> > +	struct device_node *np __free(device_node) = NULL;
> >  	void __iomem *clk_base;
> >
> >  	ctrl = devm_kzalloc(drvdata->dev, sizeof(*ctrl), GFP_KERNEL); @@
> > -71,7 +71,6 @@ s5pv210_retention_init(struct samsung_pinctrl_drv_data
> *drvdata,
> >  	}
> >
> >  	clk_base = of_iomap(np, 0);
> > -	of_node_put(np);
> 
> I don't think the code as simpler. Previous was very easy to read, obvious, no
> error paths.
> 
> To me any conversion of such of_node_get immediately followed by
> of_node_put is unwelcomed. Easy code is being  converted to complicated
> one.

ok. I will drop the changes to code pieces as you commented.

Thanks,
Peng.
> 
> 
> Best regards,
> Krzysztof