linux-kernel - Re: [PATCH net-next 1/8] dt-bindings: net: Add missing (unevaluated|additional)Properties on child node schemas

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Message-ID: <CAL_JsqJmUe9XtHEwU+GVMZc8RrKy5OV5RM6pfE2KqwMhRekMOw@mail.gmail.com>
Date:   Thu, 19 Oct 2023 13:05:04 -0500
From:   Rob Herring <robh@...nel.org>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Woojung Huh <woojung.huh@...rochip.com>,
        UNGLinuxDriver@...rochip.com,
        Linus Walleij <linus.walleij@...aro.org>,
        Alvin Šipraga <alsi@...g-olufsen.dk>,
        Clément Léger <clement.leger@...tlin.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Maxime Ripard <mripard@...nel.org>,
        nç ÜNAL <arinc.unal@...nc9.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Daniel Golle <daniel@...rotopia.org>,
        John Crispin <john@...ozen.org>,
        Gerhard Engleder <gerhard@...leder-embedded.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Sergey Shtylyov <s.shtylyov@....ru>,
        Sergei Shtylyov <sergei.shtylyov@...il.com>,
        Justin Chen <justin.chen@...adcom.com>,
        Florian Fainelli <florian.fainelli@...adcom.com>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Sekhar Nori <nsekhar@...com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-renesas-soc@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com
Subject: Re: [PATCH net-next 1/8] dt-bindings: net: Add missing
 (unevaluated|additional)Properties on child node schemas

On Thu, Oct 19, 2023 at 8:18 AM Vladimir Oltean <olteanv@...il.com> wrote:
>
> Hi Rob,
>
> On Mon, Oct 16, 2023 at 04:44:20PM -0500, Rob Herring wrote:
> > Just as unevaluatedProperties or additionalProperties are required at
> > the top level of schemas, they should (and will) also be required for
> > child node schemas. That ensures only documented properties are
> > present for any node.
> >
> > Add unevaluatedProperties or additionalProperties as appropriate.
> >
> > Signed-off-by: Rob Herring <robh@...nel.org>
> > ---
> > diff --git a/Documentation/devicetree/bindings/net/dsa/renesas,rzn1-a5psw.yaml b/Documentation/devicetree/bindings/net/dsa/renesas,rzn1-a5psw.yaml
> > index 833d2f68daa1..ea285ef3e64f 100644
> > --- a/Documentation/devicetree/bindings/net/dsa/renesas,rzn1-a5psw.yaml
> > +++ b/Documentation/devicetree/bindings/net/dsa/renesas,rzn1-a5psw.yaml
> > @@ -61,17 +61,11 @@ properties:
> >
> >    ethernet-ports:
> >      type: object
> > -    properties:
> > -      '#address-cells':
> > -        const: 1
> > -      '#size-cells':
> > -        const: 0
> > -
> > +    additionalProperties: true
> >      patternProperties:
> >        "^(ethernet-)?port@[0-4]$":
> >          type: object
> > -        description: Ethernet switch ports
> > -
> > +        additionalProperties: true
> >          properties:
> >            pcs-handle:
> >              maxItems: 1
>
> For my edification, this patch removes #address-cells and #size-cells
> at the same time, because "additionalProperties: true" (which was also
> implied before) doesn't care if they aren't defined in this sub-schema,
> and they are defined through $ref: dsa.yaml#/$defs/ethernet-ports,
> right?

Yes, they are ultimately checked via ethernet-switch.yaml which
dsa.yaml references.

Rob