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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-611c95242e4sm821075a12.26.2025.07.10.05.26.08 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 10 Jul 2025 05:26:09 -0700 (PDT) Message-ID: <1f0debc7-bde0-404b-a395-dc72ca4c82c2@oss.qualcomm.com> Date: Thu, 10 Jul 2025 14:26:07 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 12/12] pinctrl: qcom: make the pinmuxing strict To: Bartosz Golaszewski , Linus Walleij , Bjorn Andersson , Konrad Dybcio , Alexey Klimov , Lorenzo Bianconi , Sean Wang , Matthias Brugger , AngeloGioacchino Del Regno , Paul Cercueil Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, Bartosz Golaszewski References: <20250709-pinctrl-gpio-pinfuncs-v2-0-b6135149c0d9@linaro.org> <20250709-pinctrl-gpio-pinfuncs-v2-12-b6135149c0d9@linaro.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20250709-pinctrl-gpio-pinfuncs-v2-12-b6135149c0d9@linaro.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwNzEwMDEwNiBTYWx0ZWRfX0CsqIZrLoSGi RSkDmGLDapg3OGwokGksZ9KMScdE6nR9B8MolhOEGvWjzSF5aDTgkL78jbOZQ3ngBDRUb1VK9zi lxvjhYlsDpumWZtEZYfM5LW1W4dhqtBg7ONYARiyXPKi5pruIhV7zyw40+jK6//Mv3nOT6iYFGb pheu05/aZSI8uopUaj+s7lszeHHJNaZiNAwdJ0N3fqnCupRbDbIYIB++oD5qjox4KvMMm2IkrWT ISlF2XHyLGWDXgxoR6MCQT65eWBF/NvVqkdggD6WetJdYFeXo4miZefnRuKUYGbv/p8kzPgOyWx cmSh2DgFTSPmcBayMgfe/IfaEcnX2USPXyJDkaVhAzPPW2wI6vRZI9J4/sIAZQz6Am2lj1KUTaw 7Cn5SUMMwKbgnYo2hV53yLpL8vofWWJxawBFw9NYQ3YrrAdsvmJXlRWMepJ5FF5qjnTbn6U4 X-Authority-Analysis: v=2.4 cv=dciA3WXe c=1 sm=1 tr=0 ts=686fb164 cx=c_pps a=EVbN6Ke/fEF3bsl7X48z0g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=Wb1JkmetP80A:10 a=KKAkSRfTAAAA:8 a=EUspDBNiAAAA:8 a=sOBEMjS50dyNa0exkEgA:9 a=QEXdDO2ut3YA:10 a=a_PwQJl-kcHnX1M80qC6:22 a=cvBusfyB2V15izCimMoJ:22 X-Proofpoint-GUID: LdXT46-__PBYB76Uu8z9toD8_kl7m4-R X-Proofpoint-ORIG-GUID: LdXT46-__PBYB76Uu8z9toD8_kl7m4-R X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.7,FMLib:17.12.80.40 definitions=2025-07-10_02,2025-07-09_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 malwarescore=0 suspectscore=0 impostorscore=0 phishscore=0 mlxscore=0 mlxlogscore=894 bulkscore=0 lowpriorityscore=0 adultscore=0 spamscore=0 priorityscore=1501 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2505280000 definitions=main-2507100106 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250710_052613_489096_7D567DD5 X-CRM114-Status: GOOD ( 11.18 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On 7/9/25 4:39 PM, Bartosz Golaszewski wrote: > From: Bartosz Golaszewski > > 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 > --- Reviewed-by: Konrad Dybcio Konrad