linux-kernel - Re: [PATCH v2 12/12] pinctrl: qcom: make the pinmuxing strict

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Message-ID: <1f0debc7-bde0-404b-a395-dc72ca4c82c2@oss.qualcomm.com>
Date: Thu, 10 Jul 2025 14:26:07 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Bartosz Golaszewski <brgl@...ev.pl>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Alexey Klimov <alexey.klimov@...aro.org>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Sean Wang <sean.wang@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
        Paul Cercueil <paul@...pouillou.net>
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-mips@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH v2 12/12] pinctrl: qcom: make the pinmuxing strict

On 7/9/25 4:39 PM, 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.
> 
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Konrad