linux-kernel - Re: [PATCH 0/2] arm64: ACPI GTDT watchdog fixes

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Message-ID: <b20ed406-5ba4-337b-840d-fc805da642ad@huawei.com>
Date:   Thu, 22 Apr 2021 21:42:24 +0800
From:   Hanjun Guo <guohanjun@...wei.com>
To:     Marc Zyngier <maz@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Sudeep Holla <sudeep.holla@....com>
CC:     dann frazier <dann.frazier@...onical.com>,
        Fu Wei <wefu@...hat.com>, "Len Brown" <lenb@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        <linux-acpi@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <kernel-team@...roid.com>
Subject: Re: [PATCH 0/2] arm64: ACPI GTDT watchdog fixes

On 2021/4/22 0:43, Marc Zyngier wrote:
> Dann recently reported that his ThunderX machine failed to boot since
> 64b499d8df40 ("irqchip/gic-v3: Configure SGIs as standard
> interrupts"), with a not so pretty crash while trying to send an IPI.
> 
> It turned out to be caused by a mix of broken firmware and a buggy
> GTDT watchdog driver. Both have forever been buggy, but the above
> commit revealed that the error handling path of the driver was
> probably the worse part of it all.
> 
> Anyway, this short series has two goals:
> - handle broken firmware in a less broken way
> - make sure that the route cause of the problem can be identified
>    quickly

Tested on Kunpeng920 ARM64 server, didn't any issue after applying
this patch set,

Tested-by: Hanjun Guo <guohanjun@...wei.com>
Reviewed-by: Hanjun Guo <guohanjun@...wei.com>

Thanks
Hanjun