Re: [PATCH] gpiolib-acpi: Register GpioInt ACPI event handlers from a late_initcall

[Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>]

On Sun, Aug 12, 2018 at 06:25:36PM +0200, Hans de Goede wrote:
> GpioInt ACPI event handlers may see there IRQ triggered immediately
> after requesting the IRQ (esp. level triggered ones). This means that they
> may run before any (builtin) other drivers have had a chance to register
> their OpRegion handlers, leading to errors like this:
> 
> [    1.133274] ACPI Error: No handler for Region [PMOP] ((____ptrval____)) [UserDefinedRegion] (20180531/evregion-132)
> [    1.133286] ACPI Error: Region UserDefinedRegion (ID=141) has no handler (20180531/exfldio-265)
> [    1.133297] ACPI Error: Method parse/execution failed \_SB.GPO2._L01, AE_NOT_EXIST (20180531/psparse-516)
> 

Hmm, according ACPI 6.2 spec (see chapter 6.5.4 explaining _REG method)
the AML code is not supposed to access OpRegions if they are not
available (e.g there is no driver loaded).

Can you share the AML that triggers the above error?