kern/50465: athn0 broken by msi changes?

[martin%NetBSD.org@localhost]

>Number:         50465
>Category:       kern
>Synopsis:       athn0 broken by msi changes?
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Nov 23 20:30:00 +0000 2015
>Originator:     Martin Husemann
>Release:        NetBSD 7.99.21
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD night-owl.duskware.de 7.99.21 NetBSD 7.99.21 (NIGHT-OWL) #362: Sat Nov 21 22:35:47 CET 2015 martin%night-owl.duskware.de@localhost:/usr/src/sys/arch/amd64/compile/NIGHT-OWL amd64
Architecture: x86_64
Machine: amd64
>Description:

After updating my -current kernel the day before, athn0 does not work
any more. I suspect the msi changes:

ppb1: PCI Express capability version 2 <Root Port of PCI-E Root Complex> x1 @ 2.5GT/s
pci2 at ppb1 bus 3
pci2: i/o space, memory space enabled, rd/line, wr/inv ok
bge0 at pci2 dev 0 function 0: Broadcom BCM57780 Fast Ethernet
bge0: interrupting at msi0 vec 0
bge0: HW config 000a0554, 00004004, 00000008, 00000000 00000000
bge0: ASIC BCM57780 A1 (0x57780001), Ethernet address 00:26:2d:90:46:d1
bge0: setting short Tx thresholds
brgphy0 at bge0 phy 1: BCM57780 1000BASE-T media interface, rev. 1
brgphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
ppb2: PCI Express capability version 2 <Root Port of PCI-E Root Complex> x1 @ 2.5GT/s
pci3 at ppb2 bus 5
pci3: i/o space, memory space enabled, rd/line, wr/inv ok
athn0 at pci3 dev 0 function 0: Atheros AR9280
athn0: rev 2 (2T2R), ROM rev 22, address c4:17:fe:ce:37:34
athn0: interrupting at msi1 vec 0
athn0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
athn0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps

bge0 works, athn0 times out.

>How-To-Repeat:
n/a

>Fix:
n/a