linux-kernel - Re: [PATCH v3] watchdog: s3c2410: Fix potential deadlock on &wdt->lock

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Message-ID: <9b7e8438-411b-457b-1e5b-c4b37981ef67@linaro.org>
Date:   Wed, 5 Jul 2023 11:37:59 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Chengfeng Ye <dg573847474@...il.com>, alim.akhtar@...sung.com,
        wim@...ux-watchdog.org, linux@...ck-us.net
Cc:     linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-watchdog@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] watchdog: s3c2410: Fix potential deadlock on
 &wdt->lock

On 05/07/2023 11:09, Chengfeng Ye wrote:
> As &wdt->lock is acquired by hard irq s3c2410wdt_irq(),
> other acquisition of the same lock under process context should
> disable irq, otherwise deadlock could happen if the
> irq preempt the execution while the lock is held in process context
> on the same CPU.


Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Best regards,
Krzysztof