linux-kernel - Re: [PATCH 2/6] PCI: of: Use device_{add,remove}_of_node() to attach of

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Message-ID: <20241105171654.3c45c80e@bootlin.com>
Date: Tue, 5 Nov 2024 17:16:54 +0100
From: Herve Codina <herve.codina@...tlin.com>
To: Rob Herring <robh@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Rafael J. Wysocki"
 <rafael@...nel.org>, Saravana Kannan <saravanak@...gle.com>, Bjorn Helgaas
 <bhelgaas@...gle.com>, Lizhi Hou <lizhi.hou@....com>,
 linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
 linux-pci@...r.kernel.org, Allan Nielsen <allan.nielsen@...rochip.com>,
 Horatiu Vultur <horatiu.vultur@...rochip.com>, Steen Hegelund
 <steen.hegelund@...rochip.com>, Thomas Petazzoni
 <thomas.petazzoni@...tlin.com>, stable@...r.kernel.org
Subject: Re: [PATCH 2/6] PCI: of: Use device_{add,remove}_of_node() to
 attach of_node to existing device

Hi Rob,

On Mon, 4 Nov 2024 14:20:08 -0600
Rob Herring <robh@...nel.org> wrote:

> On Mon, Nov 04, 2024 at 06:19:56PM +0100, Herve Codina wrote:
> > The commit 407d1a51921e ("PCI: Create device tree node for bridge")
> > creates of_node for PCI devices. The newly created of_node is attached
> > to an existing device. This is done setting directly pdev->dev.of_node
> > in the code.
> > 
> > Even if pdev->dev.of_node cannot be previously set, this doesn't handle
> > the fwnode field of the struct device. Indeed, this field needs to be
> > set if it hasn't already been set.
> > 
> > device_{add,remove}_of_node() have been introduced to handle this case.
> > 
> > Use them instead of the direct setting.
> > 
> > Fixes: 407d1a51921e ("PCI: Create device tree node for bridge")
> > Cc: stable@...r.kernel.org  
> 
> I don't think this is stable material. What exactly would is broken 
> which would be fixed by just the first 2 patches?

Hum indeed, I haven't observed a broken behavior in current kernel.
I will remove Fixes and Cc in the next iteration.

Best regards,
Hervé