kern/56244: Expresscard re(4) does not attach

[rherdware%yahoo.com@localhost]

>Number:         56244
>Category:       kern
>Synopsis:       Expresscard re(4) does not attach
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jun 10 17:55:00 +0000 2021
>Originator:     Björn Johannesson
>Release:        9.2
>Organization:
>Environment:
NetBSD 9.2 NetBSD 9.2 (GENERIC) #0: Wed May 12 13:15:55 UTC 2021  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
>Description:
I got a gigabit ethernet ExpressCard/34 for a Thinkpad R400 that I wanted to put to some actual use. However when booted with the card inserted it does not attach. It does, of course, work with Windows 10.
In the log this single line appears:
re0 at pci3 dev 0 function 0autoconfiguration error:  : can't map registers
(The missing space is as it appears in the dmesg)
I assume the error message is from https://nxr.netbsd.org/xref//src/sys/dev/pci/if_re_pci.c#256

Card is a "Delock 66216 Express Card Gigabit Lan Card"
>How-To-Repeat:
Boot with Expresscard re(4)
>Fix: