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Date:      Mon, 30 Jul 2012 19:42:07 GMT
From:      Steven Lawrance <stl@koffein.net>
To:        freebsd-gnats-submit@FreeBSD.org
Subject:   kern/170281: ath 802.11n locks up on aggregation setup (ampdutx)
Message-ID:  <201207301942.q6UJg7sr052117@red.freebsd.org>
Resent-Message-ID: <201207301950.q6UJo69k070871@freefall.freebsd.org>

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>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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