linux-kernel - Re: [PATCH 2/9] irqchip/loongson-pch-pic: Improve edge triggered interrupt support

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Date:   Wed, 04 Aug 2021 15:23:38 +0100
From:   Marc Zyngier <maz@...nel.org>
To:     Huacai Chen <chenhuacai@...il.com>
Cc:     Huacai Chen <chenhuacai@...ngson.cn>,
        Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Xuefeng Li <lixuefeng@...ngson.cn>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Chen Zhu <zhuchen@...ngson.cn>
Subject: Re: [PATCH 2/9] irqchip/loongson-pch-pic: Improve edge triggered interrupt support

On Fri, 09 Jul 2021 04:00:58 +0100,
Huacai Chen <chenhuacai@...il.com> wrote:
> 
> Hi, Marc,
> 
> On Tue, Jul 6, 2021 at 9:06 PM Marc Zyngier <maz@...nel.org> wrote:
> >
> > On Tue, 06 Jul 2021 04:08:57 +0100,
> > Huacai Chen <chenhuacai@...ngson.cn> wrote:
> > >
> > > Edge-triggered mode and level-triggered mode need different handlers,
> > > and edge-triggered mode need a specific ack operation. So improve it.
> > >
> >
> > Is this a fix? How does it work currently?
> Yes, some devices (e.g., RTC) is edge-triggered, they need
> handle_edge_irq(). Currently we don't use RTC interrupt in the
> upstream kernel on Loongson platform, so it "works".

If you want me to queue this independently of the full LoongArch
series, please resend it with a Fixes: tag.

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.