Re: [PATCH 01/10] pmdomain: rockchip: Simplify with scoped for each OF child loop

From: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Ulf Hansson <ulf.hansson@linaro.org>,
	Heiko Stuebner <heiko@sntech.de>, Shawn Guo <shawnguo@kernel.org>,
	Sascha Hauer <s.hauer@pengutronix.de>,
	Pengutronix Kernel Team <kernel@pengutronix.de>,
	Fabio Estevam <festevam@gmail.com>,
	Bjorn Andersson <andersson@kernel.org>,
	Konrad Dybcio <konradybcio@kernel.org>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	Magnus Damm <magnus.damm@gmail.com>, <linux-pm@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-rockchip@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <imx@lists.linux.dev>,
	<linux-arm-msm@vger.kernel.org>,
	<linux-renesas-soc@vger.kernel.org>
Subject: Re: [PATCH 01/10] pmdomain: rockchip: Simplify with scoped for each OF child loop
Date: Tue, 27 Aug 2024 10:53:43 +0100	[thread overview]
Message-ID: <20240827105343.00003a72@Huawei.com> (raw)
In-Reply-To: <20240823-cleanup-h-guard-pm-domain-v1-1-8320722eaf39@linaro.org>

On Fri, 23 Aug 2024 14:51:05 +0200
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> wrote:

> Use scoped for_each_available_child_of_node_scoped() and
> for_each_child_of_node_scoped() when iterating over
> device nodes to make code a bit simpler.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Ripe for some dev_err_probe() usage that will make this even nicer
as a cleanup.

Looks good as it stands
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

> ---
>  drivers/pmdomain/rockchip/pm-domains.c | 20 ++++++--------------
>  1 file changed, 6 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/pmdomain/rockchip/pm-domains.c b/drivers/pmdomain/rockchip/pm-domains.c
> index 64b4d7120d83..5679ad336a11 100644
> --- a/drivers/pmdomain/rockchip/pm-domains.c
> +++ b/drivers/pmdomain/rockchip/pm-domains.c
> @@ -804,11 +804,10 @@ static void rockchip_configure_pd_cnt(struct rockchip_pmu *pmu,
>  static int rockchip_pm_add_subdomain(struct rockchip_pmu *pmu,
>  				     struct device_node *parent)
>  {
> -	struct device_node *np;
>  	struct generic_pm_domain *child_domain, *parent_domain;
>  	int error;
>  
> -	for_each_child_of_node(parent, np) {
> +	for_each_child_of_node_scoped(parent, np) {
>  		u32 idx;
>  
>  		error = of_property_read_u32(parent, "reg", &idx);
> @@ -816,7 +815,7 @@ static int rockchip_pm_add_subdomain(struct rockchip_pmu *pmu,
>  			dev_err(pmu->dev,
>  				"%pOFn: failed to retrieve domain id (reg): %d\n",
>  				parent, error);
> -			goto err_out;
> +			return error;
>  		}
>  		parent_domain = pmu->genpd_data.domains[idx];
>  
> @@ -824,7 +823,7 @@ static int rockchip_pm_add_subdomain(struct rockchip_pmu *pmu,
>  		if (error) {
>  			dev_err(pmu->dev, "failed to handle node %pOFn: %d\n",
>  				np, error);
> -			goto err_out;
> +			return error;
>  		}
>  
>  		error = of_property_read_u32(np, "reg", &idx);
> @@ -832,7 +831,7 @@ static int rockchip_pm_add_subdomain(struct rockchip_pmu *pmu,
>  			dev_err(pmu->dev,
>  				"%pOFn: failed to retrieve domain id (reg): %d\n",
>  				np, error);
> -			goto err_out;
> +			return error;
>  		}
>  		child_domain = pmu->genpd_data.domains[idx];
>  
> @@ -840,7 +839,7 @@ static int rockchip_pm_add_subdomain(struct rockchip_pmu *pmu,
>  		if (error) {
>  			dev_err(pmu->dev, "%s failed to add subdomain %s: %d\n",
>  				parent_domain->name, child_domain->name, error);
> -			goto err_out;
> +			return error;
>  		} else {
>  			dev_dbg(pmu->dev, "%s add subdomain: %s\n",
>  				parent_domain->name, child_domain->name);
> @@ -850,17 +849,12 @@ static int rockchip_pm_add_subdomain(struct rockchip_pmu *pmu,
>  	}
>  
>  	return 0;
> -
> -err_out:
> -	of_node_put(np);
> -	return error;
>  }
>  
>  static int rockchip_pm_domain_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
>  	struct device_node *np = dev->of_node;
> -	struct device_node *node;
>  	struct device *parent;
>  	struct rockchip_pmu *pmu;
>  	const struct rockchip_pmu_info *pmu_info;
> @@ -918,12 +912,11 @@ static int rockchip_pm_domain_probe(struct platform_device *pdev)
>  	 */
>  	mutex_lock(&dmc_pmu_mutex);
>  
> -	for_each_available_child_of_node(np, node) {
> +	for_each_available_child_of_node_scoped(np, node) {
>  		error = rockchip_pm_add_one_domain(pmu, node);
>  		if (error) {
>  			dev_err(dev, "failed to handle node %pOFn: %d\n",
>  				node, error);
> -			of_node_put(node);
>  			goto err_out;
>  		}
>  
> @@ -931,7 +924,6 @@ static int rockchip_pm_domain_probe(struct platform_device *pdev)
>  		if (error < 0) {
>  			dev_err(dev, "failed to handle subdomain node %pOFn: %d\n",
>  				node, error);
> -			of_node_put(node);
>  			goto err_out;
>  		}
>  	}
>