linux-kernel - Re: [PATCH 1/2] genirq/msi, platform-msi: Adjust return value of msi_domain_prepare

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Message-ID: <CAAhV-H7Z=cq+xzYiNc0YDf-PbNiEJYoSFyiL=12dtnC_tWPgBQ@mail.gmail.com>
Date:   Mon, 29 May 2023 17:35:01 +0800
From:   Huacai Chen <chenhuacai@...il.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Huacai Chen <chenhuacai@...ngson.cn>,
        Marc Zyngier <maz@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-kernel@...r.kernel.org, loongson-kernel@...ts.loongnix.cn,
        Xuefeng Li <lixuefeng@...ngson.cn>,
        Jiaxun Yang <jiaxun.yang@...goat.com>
Subject: Re: [PATCH 1/2] genirq/msi, platform-msi: Adjust return value of msi_domain_prepare_irqs()

Hi, Thomas,

On Mon, May 29, 2023 at 3:44 PM Thomas Gleixner <tglx@...utronix.de> wrote:
>
> On Sun, May 28 2023 at 11:42, Huacai Chen wrote:
> > On Sat, May 27, 2023 at 10:03 PM Thomas Gleixner <tglx@...utronix.de> wrote:
> >> On Sat, May 27 2023 at 13:46, Huacai Chen wrote:
> >> > After:
> >> > = 0: Success;
> >> >> 0: The modified nvec;
> >> > < 0: Error code.
> >>
> >> This explains what the patch does, but provides zero justification for
> >> this nor any analysis why this is correct for the existing use cases.
> > I checked all msi_prepare() callbacks and none of them return positive
> > values now, so I think it is correct.
>
> Still you failed to tell so in the changelog. It's not helpful if you
> think it is correct. The point is that you have to make clear why it
> _IS_ correct.
OK, I think I should add more information in the next version, thanks.

Huacai
>
> Thanks,
>
>         tglx