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Date: Fri, 17 May 2024 08:44:23 +0200
From: Patrice CHOTARD <patrice.chotard@...s.st.com>
To: "Peng Fan (OSS)" <peng.fan@....nxp.com>,
Linus Walleij
<linus.walleij@...aro.org>,
Thierry Reding <thierry.reding@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>,
Dvorkin Dmitry <dvorkin@...bo.com>, Wells Lu <wellslutw@...il.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Emil Renner Berthing
<kernel@...il.dk>,
Jianlong Huang <jianlong.huang@...rfivetech.com>,
Hal Feng
<hal.feng@...rfivetech.com>,
Orson Zhai <orsonzhai@...il.com>,
Baolin Wang
<baolin.wang@...ux.alibaba.com>,
Chunyan Zhang <zhang.lyra@...il.com>,
Viresh
Kumar <vireshk@...nel.org>,
Shiraz Hashim <shiraz.linux.kernel@...il.com>, <soc@...nel.org>,
Krzysztof Kozlowski <krzk@...nel.org>,
Sylwester Nawrocki
<s.nawrocki@...sung.com>,
Alim Akhtar <alim.akhtar@...sung.com>,
Geert
Uytterhoeven <geert+renesas@...der.be>,
Heiko Stuebner <heiko@...ech.de>, Damien Le Moal <dlemoal@...nel.org>,
Ludovic Desroches
<ludovic.desroches@...rochip.com>,
Nicolas Ferre
<nicolas.ferre@...rochip.com>,
Alexandre Belloni
<alexandre.belloni@...tlin.com>,
Claudiu Beznea <claudiu.beznea@...on.dev>,
Dong Aisheng <aisheng.dong@....com>,
Fabio Estevam <festevam@...il.com>, Shawn Guo <shawnguo@...nel.org>,
Jacky Bai <ping.bai@....com>,
Pengutronix
Kernel Team <kernel@...gutronix.de>,
Chester Lin <chester62515@...il.com>,
Matthias Brugger <mbrugger@...e.com>,
Ghennadi Procopciuc
<ghennadi.procopciuc@....nxp.com>,
Sean Wang <sean.wang@...nel.org>,
Matthias
Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Sascha Hauer
<s.hauer@...gutronix.de>,
Andrew Jeffery <andrew@...econstruct.com.au>,
Joel
Stanley <joel@....id.au>,
Dan Carpenter <dan.carpenter@...aro.org>,
Tony
Lindgren <tony@...mide.com>,
Stephen Warren <swarren@...dotorg.org>
CC: <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-tegra@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
<linux-stm32@...md-mailman.stormreply.com>,
<linux-samsung-soc@...r.kernel.org>,
<linux-renesas-soc@...r.kernel.org>,
<linux-rockchip@...ts.infradead.org>,
<linux-riscv@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>, <imx@...ts.linux.dev>,
<linux-aspeed@...ts.ozlabs.org>, <openbmc@...ts.ozlabs.org>,
Peng Fan
<peng.fan@....com>
Subject: Re: [PATCH v2 08/20] pinctrl: st: Use scope based of_node_put()
cleanups
On 5/4/24 15:20, 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/pinctrl-st.c | 37 +++++++++++--------------------------
> 1 file changed, 11 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c
> index 5d9abd6547d0..fe2d52e434db 100644
> --- a/drivers/pinctrl/pinctrl-st.c
> +++ b/drivers/pinctrl/pinctrl-st.c
> @@ -1195,10 +1195,10 @@ static int st_pctl_dt_parse_groups(struct device_node *np,
> struct property *pp;
> struct device *dev = info->dev;
> struct st_pinconf *conf;
> - struct device_node *pins;
> + struct device_node *pins __free(device_node) = NULL;
> phandle bank;
> unsigned int offset;
> - int i = 0, npins = 0, nr_props, ret = 0;
> + int i = 0, npins = 0, nr_props;
>
> pins = of_get_child_by_name(np, "st,pins");
> if (!pins)
> @@ -1213,8 +1213,7 @@ static int st_pctl_dt_parse_groups(struct device_node *np,
> npins++;
> } else {
> pr_warn("Invalid st,pins in %pOFn node\n", np);
> - ret = -EINVAL;
> - goto out_put_node;
> + return -EINVAL;
> }
> }
>
> @@ -1223,10 +1222,8 @@ static int st_pctl_dt_parse_groups(struct device_node *np,
> grp->pins = devm_kcalloc(dev, npins, sizeof(*grp->pins), GFP_KERNEL);
> grp->pin_conf = devm_kcalloc(dev, npins, sizeof(*grp->pin_conf), GFP_KERNEL);
>
> - if (!grp->pins || !grp->pin_conf) {
> - ret = -ENOMEM;
> - goto out_put_node;
> - }
> + if (!grp->pins || !grp->pin_conf)
> + return -ENOMEM;
>
> /* <bank offset mux direction rt_type rt_delay rt_clk> */
> for_each_property_of_node(pins, pp) {
> @@ -1260,17 +1257,13 @@ static int st_pctl_dt_parse_groups(struct device_node *np,
> i++;
> }
>
> -out_put_node:
> - of_node_put(pins);
> -
> - return ret;
> + return 0;
> }
>
> static int st_pctl_parse_functions(struct device_node *np,
> struct st_pinctrl *info, u32 index, int *grp_index)
> {
> struct device *dev = info->dev;
> - struct device_node *child;
> struct st_pmx_func *func;
> struct st_pctl_group *grp;
> int ret, i;
> @@ -1285,15 +1278,13 @@ static int st_pctl_parse_functions(struct device_node *np,
> return -ENOMEM;
>
> i = 0;
> - for_each_child_of_node(np, child) {
> + for_each_child_of_node_scoped(np, child) {
> func->groups[i] = child->name;
> grp = &info->groups[*grp_index];
> *grp_index += 1;
> ret = st_pctl_dt_parse_groups(child, grp, info, i++);
> - if (ret) {
> - of_node_put(child);
> + if (ret)
> return ret;
> - }
> }
> dev_info(dev, "Function[%d\t name:%s,\tgroups:%d]\n", index, func->name, func->ngroups);
>
> @@ -1601,7 +1592,6 @@ static int st_pctl_probe_dt(struct platform_device *pdev,
> int i = 0, j = 0, k = 0, bank;
> struct pinctrl_pin_desc *pdesc;
> struct device_node *np = dev->of_node;
> - struct device_node *child;
> int grp_index = 0;
> int irq = 0;
>
> @@ -1646,25 +1636,21 @@ static int st_pctl_probe_dt(struct platform_device *pdev,
> pctl_desc->pins = pdesc;
>
> bank = 0;
> - for_each_child_of_node(np, child) {
> + for_each_child_of_node_scoped(np, child) {
> if (of_property_read_bool(child, "gpio-controller")) {
> const char *bank_name = NULL;
> char **pin_names;
>
> ret = st_gpiolib_register_bank(info, bank, child);
> - if (ret) {
> - of_node_put(child);
> + if (ret)
> return ret;
> - }
>
> k = info->banks[bank].range.pin_base;
> bank_name = info->banks[bank].range.name;
>
> pin_names = devm_kasprintf_strarray(dev, bank_name, ST_GPIO_PINS_PER_BANK);
> - if (IS_ERR(pin_names)) {
> - of_node_put(child);
> + if (IS_ERR(pin_names))
> return PTR_ERR(pin_names);
> - }
>
> for (j = 0; j < ST_GPIO_PINS_PER_BANK; j++, k++) {
> pdesc->number = k;
> @@ -1678,7 +1664,6 @@ static int st_pctl_probe_dt(struct platform_device *pdev,
> i++, &grp_index);
> if (ret) {
> dev_err(dev, "No functions found.\n");
> - of_node_put(child);
> return ret;
> }
> }
>
Reviewed-by: Patrice Chotard <patrice.chotard@...s.st.com>
Thanks
Patrice
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