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Date:   Tue, 15 Jan 2019 05:53:10 -0800
From:   Christoph Hellwig <hch@infradead.org>
To:     Atish Patra <atish.patra@wdc.com>
Cc:     linux-riscv@lists.infradead.org,
        Patrick =?iso-8859-1?Q?St=E4hlin?= <me@packi.ch>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Jason Cooper <jason@lakedaemon.net>,
        Alan Kao <alankao@andestech.com>,
        Dmitriy Cherkasov <dmitriy@oss-tech.org>,
        Anup Patel <anup@brainfault.org>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        linux-kernel@vger.kernel.org,
        Michael Clark <michaeljclark@mac.com>,
        Palmer Dabbelt <palmer@sifive.com>,
        Andreas Schwab <schwab@suse.de>,
        Marc Zyngier <marc.zyngier@arm.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Zong Li <zongbox@gmail.com>
Subject: Re: [PATCH v2 4/8] RISC-V: Allow hartid-to-cpuid function to fail.
Message-ID: <20190115135310.GD28946@infradead.org>
References: <1546940318-9752-1-git-send-email-atish.patra@wdc.com>
 <1546940318-9752-5-git-send-email-atish.patra@wdc.com>
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On Tue, Jan 08, 2019 at 01:38:34AM -0800, Atish Patra wrote:
> It is perfectly okay to call riscv_hartid_to_cpuid for a
> hartid that is not mapped with an CPU id. It can happen
> if the calling functions retrieves the hartid from DT.
> However, that hartid was never brought online by the firmware
> or kernel for any reasons.
> 
> No need to BUG() in the above case. A negative error return
> is sufficient and the calling function should check for the
> return value always.
> 
> Signed-off-by: Atish Patra <atish.patra@wdc.com>

Looks fine (modulo the line length issues):

Reviewed-by: Christoph Hellwig <hch@lst.de>