[BUG REPORT] Off by one error in initializing unit number for PCCARD NICs in both recent 4.8-STABLE and 5.1-RELEASE

[John Merryweather Cooper]

Because of the nature of this bug, I have no network access on my FreeBSD
machine and so I'm filing this off my wife's laptop.  I can't send-pr in any
other manner. Would someone please post this

SYSTEM

IBM 380XD Thinkpad Laptop running either a recent (post-May) 4.8-STABLE or
5.1-RELEASE (off the ISO images off ftp.freebsd.org).

The 5.1 kernel was recompiled with OLDCARD support since NEWCARD fails in
other ways.

Using Compaq Netelligent 10/100 PCCARD Nic or NetGear Wireless (xe and wi
respectively)

SYMPTOMS

Boot and detect occur normally.  However, as the PCCARD device is being
brought up, the PCCARD subsystem is starting with a unit number of -1
instead of 0.  Hence, I get messages indicating attempts to start xe-1 which
always fail. Prior to May, STABLE was fine.

When I recompiled STABLE and found myself without network access. I decided
to install a clean install of 5.1-RELEASE.  To my chagrin, the same problem
exists on 5.1-RELEASE too.

WORKAROUND

None known.

jmc