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From: Andy Shevchenko <andy.shevchenko@gmail.com>
Date: Mon, 22 Apr 2024 10:43:08 +0300
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Vidya Sagar <vidyas@nvidia.com>,
	"Rafael J . Wysocki" <rafael@kernel.org>,
	Len Brown <lenb@kernel.org>, Will Deacon <will@kernel.org>,
	Lorenzo Pieralisi <lpieralisi@kernel.org>,
	Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= <kw@linux.com>,
	Rob Herring <robh@kernel.org>,
	Frank Rowand <frowand.list@gmail.com>,
	Thierry Reding <treding@nvidia.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
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	Vidya Sagar <sagar.tv@gmail.com>, linux-pci@vger.kernel.org,
	linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org,
	Bjorn Helgaas <bhelgaas@google.com>
Subject: Re: [PATCH v7-incomplete 3/3] PCI: Unify ACPI and DT 'preserve
 config' support
Message-ID: <ZiYVDEt-c57rAIl7@surfacebook.localdomain>
References: <20240418174043.3750240-1-vidyas@nvidia.com>
 <20240421190914.374399-1-helgaas@kernel.org>
 <20240421190914.374399-4-helgaas@kernel.org>
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Sun, Apr 21, 2024 at 02:09:14PM -0500, Bjorn Helgaas kirjoitti:

...

> +	if (host_bridge->dev.parent && host_bridge->dev.parent->of_node)
> +		return of_pci_preserve_config(host_bridge->dev.parent->of_node);

If you need fwnode or of_node from struct device, please avoid direct
dereference, we have

dev_fwnode()
of_fwnode_handle()
dev_of_node()

-- 
With Best Regards,
Andy Shevchenko