port-amd64/57225: fault during boot in igpio_acpi_attach

[armihu%gmail.com@localhost]

>Number:         57225
>Category:       port-amd64
>Synopsis:       fault during boot in igpio_acpi_attach
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-amd64-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Feb 12 17:50:00 +0000 2023
>Originator:     Arto Huusko
>Release:        10.99.2
>Organization:
>Environment:
>Description:
Booting generic kernel 10.99.2 from 2022-02-13 on Acer Aspire E11 fails with (transcribed by hand)

uvm_fault(..., ..., 1) -> e
fatal page fault in supervisor mode
trap type 6 code 0 rip ... es 0x8 rflags 0x10202 or2 .... ilevel 0x8 rsp ....
curlwp
kernel: page fault trap, code=0
stopped in pid 0.0 (system) at netbsd:bus_space_read_4+0x8: movl 0(%rdx), %eax
bus_space_read_4
igpio_acpi_attach at netbsd:igpio_acpi_attach+0x18d
config_attach_internal
config_found
acpi_rescan
acpi_attach
config_attach_internal
config_found
amd64_mainbus_attach


value of rdx 0xffff988120830000
rax ffffd3d5e860a180


>How-To-Repeat:
Boot 10.99.2/amd64 on Aspire E11.
>Fix: