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!