linux-kernel - Re: [PATCH v2 1/2] dt-bindings: interrupt-controller: sifive,plic: Fix number of interrupts

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Message-ID: <YbuvuVUx3xOhGf1A@robh.at.kernel.org>
Date:   Thu, 16 Dec 2021 15:29:29 -0600
From:   Rob Herring <robh@...nel.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     linux-riscv@...ts.infradead.org,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Sagar Kadam <sagar.kadam@...ive.com>,
        Rob Herring <robh+dt@...nel.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Marc Zyngier <maz@...nel.org>
Subject: Re: [PATCH v2 1/2] dt-bindings: interrupt-controller: sifive,plic:
 Fix number of interrupts

On Thu, 16 Dec 2021 14:41:21 +0100, Geert Uytterhoeven wrote:
> The number of interrupts lacks an upper bound, thus assuming one,
> causing properly grouped "interrupts-extended" properties to be flagged
> as an error by "make dtbs_check".
> 
> Fix this by adding the missing "maxItems".  As the architectural maximum
> is 15872 interrupts, using that as the limit would be unpractical.
> Hence limit it to 9 interrupts (one interrupt for a system management
> core, and two interrupts per core for other cores).  This should be
> sufficient for now, and the limit can always be increased when the need
> arises.
> 
> Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> ---
> v2:
>   - Split in two patches,
>   - Improve patch description and document limit rationale.
> ---
>  .../bindings/interrupt-controller/sifive,plic-1.0.0.yaml         | 1 +
>  1 file changed, 1 insertion(+)
> 

Acked-by: Rob Herring <robh@...nel.org>