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From: Tony Lindgren <tony@atomide.com>
To: Liang He <windhl@126.com>
Cc: andre.przywara@arm.com, thierry.reding@gmail.com,
	jonathanh@nvidia.com, linux-arm-kernel@lists.infradead.org,
	linux-omap@vger.kernel.org, linux-tegra@vger.kernel.org,
	Krzysztof Kozlowski <krzk@kernel.org>
Subject: Re: [PATCH] arm/mach: Hold reference returned by of_find_xxx APIs
Date: Tue, 28 Jun 2022 06:59:45 +0300	[thread overview]
Message-ID: <Yrp8sUMdmfYsiUsD@atomide.com> (raw)
In-Reply-To: <20220621091937.4082422-1-windhl@126.com>

* Liang He <windhl@126.com> [220621 12:14]:
> diff --git a/arch/arm/mach-omap2/pmic-cpcap.c b/arch/arm/mach-omap2/pmic-cpcap.c
> index 668dc84fd31e..a7368d657aa8 100644
> --- a/arch/arm/mach-omap2/pmic-cpcap.c
> +++ b/arch/arm/mach-omap2/pmic-cpcap.c
> @@ -238,8 +238,11 @@ static struct omap_voltdm_pmic omap4_fan_iva = {
>  int __init omap4_cpcap_init(void)
>  {
>  	struct voltagedomain *voltdm;
> +	struct device_node *np;
>  
> -	if (!of_find_compatible_node(NULL, NULL, "motorola,cpcap"))
> +	np = of_find_compatible_node(NULL, NULL, "motorola,cpcap");
> +	of_node_put(np);
> +	if (!np)
>  		return -ENODEV;

Hmm so here you are checking for !np after of_node_put()?

> diff --git a/arch/arm/mach-tegra/irq.c b/arch/arm/mach-tegra/irq.c
> index 4e1ee70b2a3f..2aeac041bcb9 100644
> --- a/arch/arm/mach-tegra/irq.c
> +++ b/arch/arm/mach-tegra/irq.c
> @@ -88,7 +88,11 @@ static const struct of_device_id tegra_ictlr_match[] __initconst = {
>  
>  void __init tegra_init_irq(void)
>  {
> -	if (WARN_ON(!of_find_matching_node(NULL, tegra_ictlr_match)))
> +	struct device_node *np;
> +
> +	np = of_find_matching_node(NULL, tegra_ictlr_match);
> +	of_node_put(np);
> +	if (WARN_ON(!np))
>  		pr_warn("Outdated DT detected, suspend/resume will NOT work\n");
>  
>  	tegra114_gic_cpu_pm_registration();

Here too.

Regards,

Tony

WARNING: multiple messages have this Message-ID (diff)
From: Tony Lindgren <tony@atomide.com>
To: Liang He <windhl@126.com>
Cc: andre.przywara@arm.com, thierry.reding@gmail.com,
	jonathanh@nvidia.com, linux-arm-kernel@lists.infradead.org,
	linux-omap@vger.kernel.org, linux-tegra@vger.kernel.org,
	Krzysztof Kozlowski <krzk@kernel.org>
Subject: Re: [PATCH] arm/mach: Hold reference returned by of_find_xxx APIs
Date: Tue, 28 Jun 2022 06:59:45 +0300	[thread overview]
Message-ID: <Yrp8sUMdmfYsiUsD@atomide.com> (raw)
In-Reply-To: <20220621091937.4082422-1-windhl@126.com>

* Liang He <windhl@126.com> [220621 12:14]:
> diff --git a/arch/arm/mach-omap2/pmic-cpcap.c b/arch/arm/mach-omap2/pmic-cpcap.c
> index 668dc84fd31e..a7368d657aa8 100644
> --- a/arch/arm/mach-omap2/pmic-cpcap.c
> +++ b/arch/arm/mach-omap2/pmic-cpcap.c
> @@ -238,8 +238,11 @@ static struct omap_voltdm_pmic omap4_fan_iva = {
>  int __init omap4_cpcap_init(void)
>  {
>  	struct voltagedomain *voltdm;
> +	struct device_node *np;
>  
> -	if (!of_find_compatible_node(NULL, NULL, "motorola,cpcap"))
> +	np = of_find_compatible_node(NULL, NULL, "motorola,cpcap");
> +	of_node_put(np);
> +	if (!np)
>  		return -ENODEV;

Hmm so here you are checking for !np after of_node_put()?

> diff --git a/arch/arm/mach-tegra/irq.c b/arch/arm/mach-tegra/irq.c
> index 4e1ee70b2a3f..2aeac041bcb9 100644
> --- a/arch/arm/mach-tegra/irq.c
> +++ b/arch/arm/mach-tegra/irq.c
> @@ -88,7 +88,11 @@ static const struct of_device_id tegra_ictlr_match[] __initconst = {
>  
>  void __init tegra_init_irq(void)
>  {
> -	if (WARN_ON(!of_find_matching_node(NULL, tegra_ictlr_match)))
> +	struct device_node *np;
> +
> +	np = of_find_matching_node(NULL, tegra_ictlr_match);
> +	of_node_put(np);
> +	if (WARN_ON(!np))
>  		pr_warn("Outdated DT detected, suspend/resume will NOT work\n");
>  
>  	tegra114_gic_cpu_pm_registration();

Here too.

Regards,

Tony

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  parent reply	other threads:[~2022-06-28  3:59 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-21  9:19 [PATCH] arm/mach: Hold reference returned by of_find_xxx APIs Liang He
2022-06-21  9:19 ` Liang He
2022-06-22  8:51 ` Krzysztof Kozlowski
2022-06-22  8:51   ` Krzysztof Kozlowski
2022-06-28  3:59 ` Tony Lindgren [this message]
2022-06-28  3:59   ` Tony Lindgren
2022-06-28  4:05   ` Liang He
2022-06-28  4:05     ` Liang He
2022-06-28 16:16   ` Russell King (Oracle)
2022-06-28 16:16     ` Russell King (Oracle)
2022-06-29  8:37     ` Tony Lindgren
2022-06-29  8:37       ` Tony Lindgren

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