linux-kernel - Re: [PATCH 3/3] dt-bindings: PCI: brcm,iproc-pcie: Fix 'msi' child node schema

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Date:   Wed, 27 Sep 2023 12:07:02 -0500
From:   Rob Herring <robh@...nel.org>
To:     Conor Dooley <conor@...nel.org>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Ray Jui <ray.jui@...adcom.com>,
        Scott Branden <scott.branden@...adcom.com>,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] dt-bindings: PCI: brcm,iproc-pcie: Fix 'msi' child
 node schema

On Wed, Sep 27, 2023 at 10:35 AM Conor Dooley <conor@...nel.org> wrote:
>
> On Tue, Sep 26, 2023 at 10:56:09AM -0500, Rob Herring wrote:
> > The 'msi' child node schema is missing constraints on additional properties.
> > It turns out it is incomplete and properties for it are documented in the
> > parent node by mistake. Move the reference to msi-controller.yaml and
> > the custom properties to the 'msi' node. Adding 'unevaluatedProperties'
> > ensures all the properties in the 'msi' node are documented.
> >
> > With the schema corrected, a minimal interrupt controller node is needed
> > to properly decode the interrupt properties since the example has
> > multiple interrupt parents.
>
> I suppose this is an ABI break, but the patch just makes the binding
> match the example and intent.

It also matches what the in tree users do, so not an ABI break. I
imagine the .txt binding just listed out properties and the conversion
carried that over.

> Feels like of all the patches doing the
> unevaluatedProperty additions, this one is the most deserving of a fixes
> tag, since the original binding just seems to be completely wrong?

Yes, though the example fix is a dependency, so probably not worth backporting.

Fixes: 905b986d099c ("dt-bindings: pci: Convert iProc PCIe to YAML")

Rob