ath0: device timeout with 802.11n client

[Lev Serebryakov]

Hello, Wireless.

 I have true 802.11n client in my home now -- Blackberry PlayBook, and
 my software AP shows many "ath0:" device timeout" when I use it.

 With 802.11g client only it works perfectly (if this word is
applicable to my very noisy environment), without any errors.

 But as long as PlayBook associated with AP, driver starts to show
"device timeout" every 3rd minute. PlayBook drop connection on each
AP's device timeout :(

My AP hardware is:

ath0 at pci0:0:17:0:       class=0x028000 card=0x520219b6 chip=0x0029168c rev=0x01 hdr=0x00
    vendor     = 'Atheros Communications Inc.'
    device     = 'AR922X Wireless Network Adapter'
    class      = network

ath0: <Atheros 9220> mem 0xa0060000-0xa006ffff irq 15 at device 17.0 on pci0
ath0: DMA setup: legacy
ath0: [HT] enabling HT modes
ath0: [HT] 2 RX streams; 2 TX streams
ath0: AR9220 mac 128.2 RF5133 phy 13.0
ath0: 2GHz radio: 0x0000; 5GHz radio: 0x00c0

ifconfig ath0
ath0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 2290
        ether 00:0c:42:64:69:92
        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
        media: IEEE 802.11 Wireless Ethernet autoselect mode 11ng <hostap>
        status: running

ifconfig wlan0
wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        ether 00:0c:42:64:69:92
        inet 192.168.135.1 netmask 0xffffff00 broadcast 192.168.135.255
        inet6 fe80::20c:42ff:fe64:6992%wlan0 prefixlen 64 scopeid 0xc
        inet6 2001:470:923f:2::1 prefixlen 64
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>
        media: IEEE 802.11 Wireless Ethernet autoselect mode 11ng <hostap>
        status: running
        ssid home.serebryakov.spb.ru channel 1 (2412 MHz 11g ht/20) bssid 00:0c:42:64:69:92
        regdomain ROW country DE ecm authmode WPA2/802.11i privacy MIXED
        deftxkey 2 AES-CCM 2:128-bit AES-CCM 3:128-bit txpower 30 scanvalid 60
        protmode CTS ampdulimit 64k ampdudensity 8 shortgi wme burst
        dtimperiod 1 -dfs

ifconfig wlan0 list sta
ADDR               AID CHAN RATE RSSI IDLE  TXSEQ  RXSEQ CAPS FLAG
70:d4:f2:ad:6a:26    2    1  65M 21.5   15    140   3728 EPS  AQEPHTR RSN HTCAP WME


  I have both antennas attached.

-- 
// Black Lion AKA Lev Serebryakov <lev at FreeBSD.org>