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Message-ID: <aLcBcjvMbrxoDYoC@smile.fi.intel.com>
Date: Tue, 2 Sep 2025 17:38:42 +0300
From: Andy Shevchenko <andriy.shevchenko@...el.com>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Linus Walleij <linus.walleij@...aro.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konradybcio@...nel.org>,
Alexey Klimov <alexey.klimov@...aro.org>,
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AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
Paul Cercueil <paul@...pouillou.net>, Kees Cook <kees@...nel.org>,
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Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: Re: [PATCH v7 16/16] pinctrl: qcom: make the pinmuxing strict
On Tue, Sep 02, 2025 at 01:59:25PM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
>
> The strict flag in struct pinmux_ops disallows the usage of the same pin
> as a GPIO and for another function. Without it, a rouge user-space
> process with enough privileges (or even a buggy driver) can request a
> used pin as GPIO and drive it, potentially confusing devices or even
> crashing the system. Set it globally for all pinctrl-msm users.
How does this keep (or allow) I²C generic recovery mechanism to work?
--
With Best Regards,
Andy Shevchenko
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