Date: Sat, 16 Jul 2016 12:12:40 +0200 From: Andrew Stevenson <andrew@ugh.net.au> To: freebsd-wireless@freebsd.org Subject: bf_next not NULL! Message-ID: <2DEF8DBE-1444-435C-B48C-FEAB71CA60E5@ugh.net.au>
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Hi,
I have an Atheros 9227 card in AP mode. It looks like there is some =
packet loss at the wireless layer, resulting in large delays at the IP =
layer. Also, every few days, nothing seems to be able to associate. =
Restarting the interface (/etc/rc.d/netif restart wlan0) fixes that but =
the possible packet loss remains.
I notice quite numerous errors in dmesg. Bursts of:
ath0: ath_tx_default_comp: bf 0xfffffe0000826aa0: seqno 550: bf_next not =
NULL!
ath0: ath_tx_default_comp: bf 0xfffffe0000831d20: seqno 551: bf_next not =
NULL!
ath0: ath_tx_default_comp: bf 0xfffffe0000827298: seqno 552: bf_next not =
NULL!
ath0: ath_tx_default_comp: bf 0xfffffe0000815bb0: seqno 553: bf_next not =
NULL!
ath0: ath_tx_default_comp: bf 0xfffffe0000821160: seqno 554: bf_next not =
NULL!
That can go on for about 20 lines, plus the ubiquitous:
ath0: stuck beacon; resetting (bmiss count 4)
ath0: stuck beacon; resetting (bmiss count 4)
ath0: stuck beacon; resetting (bmiss count 4)
that seems to be pretty regular.
My card from dmesg:
ath0: <Atheros 9227> mem 0x48100000-0x4810ffff irq 21 at device 0.0 on =
pci4
ath0: [HT] enabling HT modes
ath0: [HT] enabling short-GI in 20MHz mode
ath0: [HT] 1 stream STBC receive enabled
ath0: [HT] 1 stream STBC transmit enabled
ath0: [HT] 2 RX streams; 2 TX streams
ath0: Enabling register serialisation
ath0: AR9227 mac 384.2 RF5133 phy 15.15
ath0: 2GHz radio: 0x0000; 5GHz radio: 0x00c0
And ifconfig output:
wlan0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu =
1500
ether 64:70:02:f0:c8:03
inet 10.0.1.1 netmask 0xffffff00 broadcast 10.0.1.255=20
inet6 fe80::6670:2ff:fef0:c803%wlan0 prefixlen 64 scopeid 0x6=20
nd6 options=3D61<PERFORMNUD,AUTO_LINKLOCAL,NO_RADR>
media: IEEE 802.11 Wireless Ethernet autoselect mode 11g =
<hostap>
status: running
ssid UgH channel 11 (2462 MHz 11g) bssid 64:70:02:f0:c8:03
regdomain ETSI country DE indoor ecm authmode WPA2/802.11i
privacy MIXED deftxkey 3 AES-CCM 2:128-bit AES-CCM 3:128-bit
txpower 30 scanvalid 60 protmode CTS wme burst dtimperiod 1 -dfs
I had previously been using 11ng but have just tried switching to see if =
11g had the same problems (it seems to).
I'm running 10.3-STABLE r302736.
Any ideas?
Thanks,
Andrew=
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