>Number: 170281
>Category: kern
>Synopsis: ath 802.11n locks up on aggregation setup (ampdutx)
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Jul 30 19:50:06 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: Steven Lawrance
>Release: r238892
>Organization:
>Environment:
FreeBSD mateine.koffein.net 9.1-BETA1 FreeBSD 9.1-BETA1 #0: Sun Jul 29 00:33:51
CEST 2012
s...@buzz.koffein.net:/home/stl/nanobsd.mateine/usr/src/sys/MATEINE i386
>Description:
Using an AR9220 MiniPCI in 11n hostap mode, I see a lock-up (i.e. no more
traffic over the device) when attempting to start a file transfer from a Linux
client with a Broadcom (BCM43224 802.11a/b/g/n) NIC.
The problem goes away when ampdutx is disabled.
ath0: <Atheros 9280> mem 0xe0080000-0xe008ffff irq 9 at device 12.0 on pci0
[ath] enabling AN_TOP2_FIXUP
ath0: [HT] enabling HT modes
ath0: [HT] 2 RX streams; 2 TX streams
ath0: AR9280 mac 128.2 RF5133 phy 13.0
# ifconfig wlan0
wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
ether 00:80:48:72:63:5f
inet 192.168.2.1 netmask 0xffffff00 broadcast 192.168.2.255
inet6 fe80::280:48ff:fe72:635f%wlan0 prefixlen 64 scopeid 0xa
nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
media: IEEE 802.11 Wireless Ethernet autoselect mode 11ng <hostap>
status: running
ssid testap channel 4 (2427 MHz 11g ht/20) bssid 00:80:48:72:63:5f
regdomain ETSI2 country AT ecm authmode OPEN privacy OFF txpower 30
scanvalid 60 protmode CTS ampdulimit 64k ampdudensity 8 shortgi wme
burst dtimperiod 1 -dfs
>How-To-Repeat:
Set the device to hostap mode, and initiate a file transfer / other traffic
from a Linux client.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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