linux-kernel - Re: [PATCH] pinctrl: amd: Disable and mask interrupts on resume

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: <CACRpkdZj4qAwMv3ZVDt43WmEyLF0Qv4SW2uSqGtNd1Yuiwgz4Q@mail.gmail.com>
Date:   Tue, 28 Mar 2023 15:20:49 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Kornel Dulęba <korneld@...omium.org>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Basavaraj Natikar <Basavaraj.Natikar@....com>,
        Shyam Sundar S K <Shyam-sundar.S-k@....com>,
        upstream@...ihalf.com, rad@...ihalf.com, mattedavis@...gle.com
Subject: Re: [PATCH] pinctrl: amd: Disable and mask interrupts on resume

On Mon, Mar 20, 2023 at 10:33 AM Kornel Dulęba <korneld@...omium.org> wrote:

> This fixes a similar problem to the one observed in:
> commit 4e5a04be88fe ("pinctrl: amd: disable and mask interrupts on probe").
>
> On some systems, during suspend/resume cycle firmware leaves
> an interrupt enabled on a pin that is not used by the kernel.
> This confuses the AMD pinctrl driver and causes spurious interrupts.
>
> The driver already has logic to detect if a pin is used by the kernel.
> Leverage it to re-initialize interrupt fields of a pin only if it's not
> used by us.
>
> Signed-off-by: Kornel Dulęba <korneld@...omium.org>

Patch applied for fixes with CC to stable!

Yours,
Linus Walleij