wm(4)/ikphy(4) panic on shutdown

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

Hello,
on a 6.0_BETA2 host at reboot I get:
ikphy1: detached
wm1: detached
ikphy0: detached
Skipping crash dump on recursive panic
panic: _bus_dmamap_sync: bad offset
fatal breakpoint trap in supervisor mode
trap type 1 code 0 rip ffffffff802592a5 cs 8 rflags 246 cr2  7f7ff60fd6a0 cpl 6 
rsp fffffe810aed09b8
Stopped in pid 0.5 (system) at  netbsd:breakpoint+0x5:  leave
db{0}> tr
breakpoint() at netbsd:breakpoint+0x5
vpanic() at netbsd:vpanic+0x1f2
printf_nolog() at netbsd:printf_nolog
bus_dmamap_create() at netbsd:bus_dmamap_create
wm_intr() at netbsd:wm_intr+0xf5
intr_biglock_wrapper() at netbsd:intr_biglock_wrapper+0x1d
Xintr_ioapic_level3() at netbsd:Xintr_ioapic_level3+0xf6
--- interrupt ---
x86_pause() at netbsd:x86_pause+0x2
callout_softclock() at netbsd:callout_softclock+0x390
softint_dispatch() at netbsd:softint_dispatch+0xd9
DDB lost frame for netbsd:Xsoftintr+0x4f, trying 0xfffffe810aed0d70
Xsoftintr() at netbsd:Xsoftintr+0x4f
--- interrupt ---

(wm1 is down but wm0 is up). This seems to be fixed in HEAD but I couldn't
find what change fixed it. Any idea ?

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
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