The following commit has been merged into the irq/urgent branch of tip:

Commit-ID: 38a05c0b87833f5b188ae43b428b1f792df2b384 Gitweb: https://git.kernel.org/tip/38a05c0b87833f5b188ae43b428b1f792df2b384 Author: Stephan Gerhold stephan.gerhold@linaro.org AuthorDate: Fri, 02 May 2025 13:22:28 +02:00 Committer: Thomas Gleixner tglx@linutronix.de CommitterDate: Fri, 02 May 2025 21:07:02 +02:00

irqchip/qcom-mpm: Prevent crash when trying to handle non-wake GPIOs

On Qualcomm chipsets not all GPIOs are wakeup capable. Those GPIOs do not have a corresponding MPM pin and should not be handled inside the MPM driver. The IRQ domain hierarchy is always applied, so it's required to explicitly disconnect the hierarchy for those. The pinctrl-msm driver marks these with GPIO_NO_WAKE_IRQ. qcom-pdc has a check for this, but irq-qcom-mpm is currently missing the check. This is causing crashes when setting up interrupts for non-wake GPIOs:

root@rb1:~# gpiomon -c gpiochip1 10 irq: IRQ159: trimming hierarchy from :soc@0:interrupt-controller@f200000-1 Unable to handle kernel paging request at virtual address ffff8000a1dc3820 Hardware name: Qualcomm Technologies, Inc. Robotics RB1 (DT) pc : mpm_set_type+0x80/0xcc lr : mpm_set_type+0x5c/0xcc Call trace: mpm_set_type+0x80/0xcc (P) qcom_mpm_set_type+0x64/0x158 irq_chip_set_type_parent+0x20/0x38 msm_gpio_irq_set_type+0x50/0x530 __irq_set_trigger+0x60/0x184 __setup_irq+0x304/0x6bc request_threaded_irq+0xc8/0x19c edge_detector_setup+0x260/0x364 linereq_create+0x420/0x5a8 gpio_ioctl+0x2d4/0x6c0

Fix this by copying the check for GPIO_NO_WAKE_IRQ from qcom-pdc.c, so that MPM is removed entirely from the hierarchy for non-wake GPIOs.

Fixes: a6199bb514d8 ("irqchip: Add Qualcomm MPM controller driver") Reported-by: Alexey Klimov alexey.klimov@linaro.org Signed-off-by: Stephan Gerhold stephan.gerhold@linaro.org Signed-off-by: Thomas Gleixner tglx@linutronix.de Tested-by: Alexey Klimov alexey.klimov@linaro.org Reviewed-by: Bartosz Golaszewski bartosz.golaszewski@linaro.org Cc: stable@vger.kernel.org Link: https://lore.kernel.org/all/20250502-irq-qcom-mpm-fix-no-wake-v1-1-8a1eafcd2... --- drivers/irqchip/irq-qcom-mpm.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/irqchip/irq-qcom-mpm.c b/drivers/irqchip/irq-qcom-mpm.c index 7942d8e..f772deb 100644 --- a/drivers/irqchip/irq-qcom-mpm.c +++ b/drivers/irqchip/irq-qcom-mpm.c @@ -227,6 +227,9 @@ static int qcom_mpm_alloc(struct irq_domain *domain, unsigned int virq, if (ret) return ret;

+ if (pin == GPIO_NO_WAKE_IRQ) + return irq_domain_disconnect_hierarchy(domain, virq); + ret = irq_domain_set_hwirq_and_chip(domain, virq, pin, &qcom_mpm_chip, priv); if (ret)