linux-kernel - Re: [PATCH v2] ARM: dts: spear13xx: Update SPI dma properties

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Message-ID: <20220325173826.GA70042@9a2d8922b8f1>
Date:   Fri, 25 Mar 2022 23:08:26 +0530
From:   Kuldeep Singh <singh.kuldeep87k@...il.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Viresh Kumar <viresh.kumar@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Viresh Kumar <vireshk@...nel.org>,
        Shiraz Hashim <shiraz.linux.kernel@...il.com>,
        SoC Team <soc@...nel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        DTML <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] ARM: dts: spear13xx: Update SPI dma properties

On Fri, Mar 25, 2022 at 10:11:41AM +0100, Arnd Bergmann wrote:
> On Fri, Mar 25, 2022 at 2:58 AM Viresh Kumar <viresh.kumar@...aro.org> wrote:
> > On 24-03-22, 11:55, Kuldeep Singh wrote:
> > > Fixed order of values is important in case of properties like
> > > compatibles etc. In case of dma-names, yes order shouldn't matter here.
> > >
> > > This patch is more of appeasing dtbs_check warning rather than fixing
> > > something.
> >
> > Exactly my point. We have seen similar type of issues with other tools, like
> > coccinelle, earlier and such patches were rejected as the kernel was just fine
> > and tooling needs to be fixed.
> >
> > > It's safe to go with this patch.
> > > I am not sure if there's a provision to exclude dma-names from fix
> > > ordering checks. Rob can help here in providing better insights.
> 
> I think it's a question of the scale of the warnings: my understanding is that
> there are only a handful of dts files that trigger the warning at all, and it
> would be rather hard to change the tooling around this. Since the proposed
> dts change is clearly harmless, I don't mind applying it.
> 
> Kuldeep, you have probably looked at all dts files in the kernel, can you
> say how many of them are affected by the dma property reordering?

I have checked spi-pl022.yaml as of now and this was the only one which
was affected with dma ordering.

For all dts files, I can definitely give a try and will come up with
some numbers. Please note, there are still bindings left to be converted
to yaml format, so won't be able to catch those cases.

- Kuldeep