linux-kernel - Re: [PATCH v5 3/3] irqchip/loongson-eiointc: Refine irq affinity setting during resume

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Date: Tue, 13 Feb 2024 10:49:23 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: Bibo Mao <maobibo@...ngson.cn>, Huacai Chen <chenhuacai@...nel.org>,
 Jiaxun Yang <jiaxun.yang@...goat.com>
Cc: linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org, Sergey
 Shtylyov <s.shtylyov@....ru>, lvjianmin@...ngson.cn
Subject: Re: [PATCH v5 3/3] irqchip/loongson-eiointc: Refine irq affinity
 setting during resume

On Tue, Jan 30 2024 at 16:27, Bibo Mao wrote:
> During suspend and resume, CPUs except CPU0 can be hot-unpluged and IRQs
> will be migrated to CPU0. So it is not necessary to restore irq affinity
> for eiointc irq controller when system resumes.

That's not the reason. The point is that eiointc_router_init() which is
invoked in the resume path affines all interrupts to CPU0, so the
restore operation is redundant, no?

> This patch removes this piece of code about irq affinity restoring in
> function eiointc_resume().

Again. 'This patch' is pointless because we already know that this is a
patch, no?