Hi!

Lately, with a NetBSD-4.99.2 kernel from Sep 16, 2006, wi0
semi-regularly stops accepting traffic, with the following messages:

Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: command failed, cmd=0x121, arg=0xfc84
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host last message repeated 2 times
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host last message repeated 2 times
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 02
Sep 25 14:25:53 host /netbsd: wi0: wi_tx_intr null node, rssdesc 04
Sep 25 14:49:22 host ntpd[538]: sendto(63.200.199.38) (fd=22): No route to host
Sep 25 15:00:00 host syslogd: restart
Sep 25 15:57:28 host ntpd[538]: sendto(200.89.64.136) (fd=22): No route to host
Sep 25 16:31:40 host ntpd[538]: sendto(200.89.64.136) (fd=22): No route to host
Sep 25 16:31:55 host ntpd[538]: sendto(63.200.199.38) (fd=22): No route to host
Sep 25 16:38:36 host ntpd[538]: sendto(83.67.64.230) (fd=22): No route to host
Sep 25 16:49:01 host ntpd[538]: sendto(63.200.199.38) (fd=22): No route to host
Sep 25 16:55:40 host ntpd[538]: sendto(83.67.64.230) (fd=22): No route to host
Sep 25 17:05:48 host ntpd[538]: sendto(200.89.64.136) (fd=22): No route to host
Sep 25 17:06:04 host ntpd[538]: sendto(63.200.199.38) (fd=22): No route to host
Sep 25 17:23:07 host ntpd[538]: sendto(63.200.199.38) (fd=22): No route to host
Sep 25 17:40:11 host ntpd[538]: sendto(63.200.199.38) (fd=22): No route to host
Sep 25 17:57:15 host ntpd[538]: sendto(63.200.199.38) (fd=22): No route to host
Sep 25 18:14:06 host ntpd[538]: sendto(200.89.64.136) (fd=22): No route to host
Sep 25 18:14:21 host ntpd[538]: sendto(63.200.199.38) (fd=22): No route to host
Sep 25 18:15:42 host syslogd: Exiting on signal 15
Sep 25 18:17:58 host syslogd: restart
Sep 25 18:17:58 host /netbsd: wi0: command failed, cmd=0x121, arg=0xfc80
Sep 25 18:17:58 host /netbsd: syncing disks... 3 done

I hadn't seen that one before, but now it's happened three times
in the last week. Any ideas?
 Thomas