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charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260202-i2c-dpaux-irqsafe-v1-1-5b1847e8bc97@nvidia.com> X-B4-Tracking: v=1; b=H4sIAAAAAAAC/x2MMQqAMAwAvyKZDaRBRPyKONQ2ahatLYog/t3gc nDD3QNFskqBvnogy6VF983E1RWE1W+LoEZzYOKWDKgcMCZ/3qj5KH4WlBioabmbGnJgXcoy6/0 /h/F9P+/4UlljAAAA X-Change-ID: 20260202-i2c-dpaux-irqsafe-edc04628b401 To: Dmitry Osipenko , Andi Shyti , Thierry Reding , Jonathan Hunter Cc: linux-i2c@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, Mikko Perttunen X-Mailer: b4 0.14.3 X-ClientProxiedBy: TY1PR01CA0189.jpnprd01.prod.outlook.com (2603:1096:403::19) To SJ2PR12MB9161.namprd12.prod.outlook.com (2603:10b6:a03:566::20) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ2PR12MB9161:EE_|CY8PR12MB7314:EE_ X-MS-Office365-Filtering-Correlation-Id: e8273963-0de2-4054-ded6-08de621589c1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|10070799003|366016|1800799024; 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This requires taking a mutex, so these devices cannot be marked as IRQ safe. Discovered through lockdep. Signed-off-by: Mikko Perttunen --- drivers/i2c/busses/i2c-tegra.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index bec619b9af4e..4eaeb395d5db 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -2047,8 +2047,11 @@ static int tegra_i2c_probe(struct platform_device *p= dev) * * VI I2C device shouldn't be marked as IRQ-safe because VI I2C won't * be used for atomic transfers. ACPI device is not IRQ safe also. + * + * Devices with pinctrl states cannot be marked IRQ-safe as the pinctrl + * state transitions during runtime PM require mutexes. */ - if (!IS_VI(i2c_dev) && !has_acpi_companion(i2c_dev->dev)) + if (!IS_VI(i2c_dev) && !has_acpi_companion(i2c_dev->dev) && !i2c_dev->dev= ->pins) pm_runtime_irq_safe(i2c_dev->dev); =20 pm_runtime_enable(i2c_dev->dev); --- base-commit: 4f938c7d3b25d87b356af4106c2682caf8c835a2 change-id: 20260202-i2c-dpaux-irqsafe-edc04628b401