On Wed, Mar 13, 2024 at 11:16:32AM +1300, Hamish Martin wrote: > There is an issue with ACPI overlay table removal specifically related > to I2C multiplexers. > > Consider an ACPI SSDT Overlay that defines a PCA9548 I2C mux on an > existing I2C bus. When this table is loaded we see the creation of a > device for the overall PCA9548 chip and 8 further devices - one > i2c_adapter each for the mux channels. These are all bound to their > ACPI equivalents via an eventual invocation of acpi_bind_one(). > > When we unload the SSDT overlay we run into the problem. The ACPI > devices are deleted as normal via acpi_device_del_work_fn() and the > acpi_device_del_list. > > However, the following warning and stack trace is output as the > deletion does not go smoothly: Applied to for-current, thanks!
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