linux-kernel - Re: [PATCH 4/8] ASoC: rt5640: Fix sleep in atomic context

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <f22b4fc0-56a8-a919-3949-34a7fcff802c@nvidia.com>
Date:   Fri, 23 Jun 2023 10:24:36 +0530
From:   Sameer Pujar <spujar@...dia.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     robh+dt@...nel.org, krzk+dt@...nel.org, thierry.reding@...il.com,
        lgirdwood@...il.com, perex@...ex.cz, tiwai@...e.com,
        jonathanh@...dia.com, mkumard@...dia.com, sheetal@...dia.com,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org, Oder Chiou <oder_chiou@...ltek.com>
Subject: Re: [PATCH 4/8] ASoC: rt5640: Fix sleep in atomic context



On 22-06-2023 17:42, Mark Brown wrote:
> On Thu, Jun 22, 2023 at 05:04:12PM +0530, Sameer Pujar wrote:
>
>> The IRQ handler rt5640_irq() runs in interrupt context and can sleep
>> during cancel_delayed_work_sync().
>> Fix this by running IRQ handler, rt5640_irq(), in thread context.
>> Hence replace request_irq() calls with devm_request_threaded_irq().
>> -		ret = request_irq(rt5640->jd_gpio_irq, rt5640_jd_gpio_irq,
>> -				  IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
>> -				  "rt5640-jd-gpio", rt5640);
>> +		ret = devm_request_threaded_irq(component->dev,
>> +				rt5640->jd_gpio_irq,
>> +				NULL, rt5640_jd_gpio_irq,
>> +				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
>> +				"rt5640-jd-gpio", rt5640);
> This is rt5640_jd_gpio_irq() which just does a queue_delayed_work() not
> a cancel.  Why is it being changed?

Will drop this part in v2. Thanks.