ath0: could not map interrupt

[Tim Chase]

I'd opened this thread over on freebsd-wireless@

https://lists.freebsd.org/pipermail/freebsd-wireless/2018-May/007968.html

but folks there don't seem to have the bandwidth to troubleshoot what
appears to be an irq-sharing issue.  So I hoped freebsd-drivers@
would be able to pick up from there.  Full dmesg output in that
thread, (re)tested in -CURRENT (r333017) with the same results.

Running OpenBSD 6.3 on the same machine finds and configures the
ath0/athn0 card fine and is able to share int17 with my PCI bridge
without issue.  But I'd really prefer to run FreeBSD on the box if
possible.

Any suggestions on where to take this next or additional
troubleshooting steps?

Thanks,

-tkc