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Date: Wed, 1 May 2024 18:34:47 +0200
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Subject: Re: [PATCH 08/21] pinctrl: samsung: Use scope based of_node_put()
 cleanups
To: "Peng Fan (OSS)" <peng.fan@oss.nxp.com>,
 Linus Walleij <linus.walleij@linaro.org>,
 Thierry Reding <thierry.reding@gmail.com>,
 Jonathan Hunter <jonathanh@nvidia.com>, Dvorkin Dmitry <dvorkin@tibbo.com>,
 Wells Lu <wellslutw@gmail.com>, Maxime Coquelin <mcoquelin.stm32@gmail.com>,
 Alexandre Torgue <alexandre.torgue@foss.st.com>,
 Emil Renner Berthing <kernel@esmil.dk>,
 Jianlong Huang <jianlong.huang@starfivetech.com>,
 Hal Feng <hal.feng@starfivetech.com>, Orson Zhai <orsonzhai@gmail.com>,
 Baolin Wang <baolin.wang@linux.alibaba.com>,
 Chunyan Zhang <zhang.lyra@gmail.com>, Viresh Kumar <vireshk@kernel.org>,
 Shiraz Hashim <shiraz.linux.kernel@gmail.com>, soc@kernel.org,
 Sylwester Nawrocki <s.nawrocki@samsung.com>,
 Alim Akhtar <alim.akhtar@samsung.com>,
 Geert Uytterhoeven <geert+renesas@glider.be>,
 Patrice Chotard <patrice.chotard@foss.st.com>,
 Heiko Stuebner <heiko@sntech.de>, Damien Le Moal <dlemoal@kernel.org>,
 Ludovic Desroches <ludovic.desroches@microchip.com>,
 Nicolas Ferre <nicolas.ferre@microchip.com>,
 Alexandre Belloni <alexandre.belloni@bootlin.com>,
 Claudiu Beznea <claudiu.beznea@tuxon.dev>,
 Dong Aisheng <aisheng.dong@nxp.com>, Fabio Estevam <festevam@gmail.com>,
 Shawn Guo <shawnguo@kernel.org>, Jacky Bai <ping.bai@nxp.com>,
 Pengutronix Kernel Team <kernel@pengutronix.de>,
 Chester Lin <chester62515@gmail.com>, Matthias Brugger <mbrugger@suse.com>,
 Ghennadi Procopciuc <ghennadi.procopciuc@oss.nxp.com>,
 Sean Wang <sean.wang@kernel.org>, Matthias Brugger <matthias.bgg@gmail.com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>,
 Sascha Hauer <s.hauer@pengutronix.de>,
 Andrew Jeffery <andrew@codeconstruct.com.au>, Joel Stanley <joel@jms.id.au>,
 Dan Carpenter <dan.carpenter@linaro.org>
Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,
 linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
 linux-stm32@st-md-mailman.stormreply.com, linux-samsung-soc@vger.kernel.org,
 linux-renesas-soc@vger.kernel.org, linux-rockchip@lists.infradead.org,
 linux-riscv@lists.infradead.org, linux-mediatek@lists.infradead.org,
 imx@lists.linux.dev, linux-aspeed@lists.ozlabs.org,
 openbmc@lists.ozlabs.org, Peng Fan <peng.fan@nxp.com>
References: <20240501-pinctrl-cleanup-v1-0-797ceca46e5c@nxp.com>
 <20240501-pinctrl-cleanup-v1-8-797ceca46e5c@nxp.com>
From: Krzysztof Kozlowski <krzk@kernel.org>
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In-Reply-To: <20240501-pinctrl-cleanup-v1-8-797ceca46e5c@nxp.com>
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On 01/05/2024 14:56, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> Use scope based of_node_put() cleanup to simplify code.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.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.


Best regards,
Krzysztof