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List:       freebsd-bugs
Subject:    kern/170281: ath 802.11n locks up on aggregation setup (ampdutx)
From:       Steven Lawrance <stl () koffein ! net>
Date:       2012-07-30 19:42:07
Message-ID: 201207301942.q6UJg7sr052117 () red ! freebsd ! org
[Download RAW message or body]


> 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     stl@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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