ath0: device timeout

[Paul Ripke <stix%stix.id.au@localhost>]

I was hoping things might improve upgrading from netbsd-4 to netbsd-5,
but I still get many of the following:

Apr 13 18:03:13 zion /netbsd: ath0: device timeout (txq 1, txintrperiod 5)
Apr 13 18:03:43 zion /netbsd: ath0: device timeout (txq 1, txintrperiod 4)
Apr 13 18:03:50 zion /netbsd: ath0: device timeout (txq 1, txintrperiod 3)
Apr 13 18:04:24 zion /netbsd: ath0: device timeout (txq 8, txintrperiod 2)
Apr 13 18:04:42 zion /netbsd: ath0: device timeout (txq 8, txintrperiod 1)
Apr 13 18:04:47 zion /netbsd: ath0: device timeout (txq 8, txintrperiod 1)
Apr 13 18:08:47 zion /netbsd: ath0: device timeout (txq 8, txintrperiod 1)

After each one, there is a chance that one or more of my ssh sessions
drop, so it is rather annoying.

Card reports at startup:
Apr 13 18:02:35 zion /netbsd: ath0 at pci2 dev 12 function 0ioapic0: int20 
b066<vector=66,delmode=0,pending,actlo,level,
dest=0> 0<target=0>
Apr 13 18:02:35 zion /netbsd: 
Apr 13 18:02:35 zion /netbsd: ath0: interrupting at ioapic0 pin 20
Apr 13 18:02:35 zion /netbsd: ath0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
Apr 13 18:02:35 zion /netbsd: ath0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 
9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps
 54Mbps
Apr 13 18:02:35 zion /netbsd: ath0: mac 7.9 phy 4.5 radio 5.6
...
Apr 13 18:02:35 zion /netbsd: ath0: setting keyix 0 w/o power

It's a D-Link DWL-G520 rev B4, fw 4.31. sysctl values are all default.
ifconfig is:
ath0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
        ssid succubus nwkey *****
        powersave off
        bssid 00:1b:11:17:6b:70 chan 9
        address: 00:1b:11:17:6b:70
        media: IEEE802.11 autoselect mode 11g hostap
        status: active
        inet 192.168.254.129 netmask 0xffffff80 broadcast 192.168.254.255
        inet6 fe80::21b:11ff:fe17:6b70%ath0 prefixlen 64 scopeid 0x3

I've moved it between PCI slots to attempt to minimise interrupt
sharing, but that doesn't seem to have improved things.

Any suggestions? A while back, someone suggested running
wpa_supplicant, but I'm pretty sure that's client side - and won't
do hostap.

-- 
Paul Ripke
I love deadlines. I like the whooshing sound they make as they fly by.
-- Douglas Adams