linux-kernel - Re: [PATCH v4 04/19] irqdomain: Fix association race

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Message-ID: <874jsoluxd.ffs@tglx>
Date:   Tue, 17 Jan 2023 22:20:46 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Johan Hovold <johan+linaro@...nel.org>,
        Marc Zyngier <maz@...nel.org>
Cc:     x86@...nel.org, platform-driver-x86@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Johan Hovold <johan+linaro@...nel.org>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Mark-PK Tsai <mark-pk.tsai@...iatek.com>
Subject: Re: [PATCH v4 04/19] irqdomain: Fix association race

On Mon, Jan 16 2023 at 14:50, Johan Hovold wrote:
> The sanity check for an already mapped virq was done outside of the

s/was/is/

> irq_domain_mutex-protected section which meant that an (unlikely) racing

s/meant/means/

> association may not be detected.

You describe the status quo and then correctly what the fix is:

> Fix this by factoring out the association implementation, which will
> also be used in follow-on changes to rework the locking.

Otherwise your fix fixes something which existed in the past, no?

Thanks,

        tglx