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Message-ID: <e0b38120-8b09-4695-974c-f3c3ef226f22@redhat.com>
Date:   Fri, 1 Dec 2023 14:49:03 +1100
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Subject: Re: [PATCH 11/21] drivers: base: Print a warning instead of panic()
 when register_cpu() fails
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To:     "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>,
        linux-pm@vger.kernel.org, loongarch@lists.linux.dev,
        linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-riscv@lists.infradead.org, kvmarm@lists.linux.dev,
        x86@kernel.org, linux-csky@vger.kernel.org,
        linux-doc@vger.kernel.org, linux-ia64@vger.kernel.org,
        linux-parisc@vger.kernel.org
Cc:     Salil Mehta <salil.mehta@huawei.com>,
        Jean-Philippe Brucker <jean-philippe@linaro.org>,
        jianyong.wu@arm.com, justin.he@arm.com,
        James Morse <james.morse@arm.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J. Wysocki" <rafael@kernel.org>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>
References: <ZVyz/Ve5pPu8AWoA@shell.armlinux.org.uk>
 <E1r5R3W-00CszU-GM@rmk-PC.armlinux.org.uk>
From:   Gavin Shan <gshan@redhat.com>
In-Reply-To: <E1r5R3W-00CszU-GM@rmk-PC.armlinux.org.uk>
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On 11/22/23 00:44, Russell King (Oracle) wrote:
> From: James Morse <james.morse@arm.com>
> 
> loongarch, mips, parisc, riscv and sh all print a warning if
> register_cpu() returns an error. Architectures that use
> GENERIC_CPU_DEVICES call panic() instead.
> 
> Errors in this path indicate something is wrong with the firmware
> description of the platform, but the kernel is able to keep running.
> 
> Downgrade this to a warning to make it easier to debug this issue.
> 
> This will allow architectures that switching over to GENERIC_CPU_DEVICES
> to drop their warning, but keep the existing behaviour.
> 
> Signed-off-by: James Morse <james.morse@arm.com>
> Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
> Reviewed-by: Shaoqin Huang <shahuang@redhat.com>
> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
> ---
>   drivers/base/cpu.c | 7 ++++---
>   1 file changed, 4 insertions(+), 3 deletions(-)
> 

Reviewed-by: Gavin Shan <gshan@redhat.com>