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Hey,
got same problems here with TPL-1043nd, but don't know, if this is an intel hw
problem. it happens direct after booting and while stations connected. I'm using
openwrt trunk r24810 and run 3 routers with WPA2 enterprise setup, all 3 router
produce these warnings.
- -- lynxis
on booting :
Compat-wireless backport release: compat-wireless-2010-12-10-3-g880bb0b
Backport based on wireless-testing.git master-2010-12-16
ieee80211 phy1: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy1: Atheros AR9100 MAC/BB Rev:0 AR2133 RF Rev:a2
mem=0xb80c0000, irq=2
..
device wlan0 entered promiscuous mode
br-lan: port 2(wlan0) entering forwarding state
ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020
ath: Could not stop RX, we could be confusing the DMA engine when we start RX up
ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020
device wlan0 left promiscuous mode
br-lan: port 2(wlan0) entering disabled state
device wlan0 entered promiscuous mode
br-lan: port 2(wlan0) entering forwarding state
ar71xx-wdt: enabling watchdog timer
while running:
ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020
ath: Could not stop RX, we could be confusing the DMA engine when we start RX up
..
ath: Failed to stop TX DMA in 100 msec after killing last frame
config:
config 'wifi-device' 'radio0'
option 'type' 'mac80211'
option 'channel' '1'
option 'macaddr' '00:23:..'
option 'hwmode' '11ng'
option 'htmode' 'HT20'
list 'ht_capab' 'SHORT-GI-40'
list 'ht_capab' 'DSSS_CCK-40'
option 'txpower' '17'
On Wed, 12 Jan 2011 13:09:11 -0600
"J. Ryan Earl" <[email protected]> wrote:
> On Wed, Jan 12, 2011 at 11:54 AM, John Clark
> <[email protected]>wrote:
>
> > Roback, Joe schrieb:
> >
> >> I would agree, lately, I am seeing a bunch of these in my logs:
> >>
> >> ath: Failed to stop TX DMA in 100 msec after killing last frame
> >>>
> >>
> >> but my 802.11n 40MHz performance has been the best its been in 6
> >> months ;-)
> >>
> >>
> >> On Tue, 11 Jan 2011 16:35:10 -0600, "J. Ryan Earl"
> >> <[email protected]> wrote:
> >>
> >>>
> >>>
> >>> What's the exact error? I've see something similar in my dmesg:
> >>>
> >>> ath: Failed to stop TX DMA in 100 msec after killing last frame
> >>>
> >>> However, I get great performance regardless. Able to pull 150
> >>> mbit/s actual
> >>> in a 2x2 MIMO configuration.
> >>>
> It is in "Access Point" mode. I measured throughput not with iperf,
> but by transferring data from a server on the LAN-side to an
> associated wireless device (a laptop in my case with a Intel 5100 AGN
> card) and inspecting the network traffic on both ends of the
> transport. I would suggest generating the traffic outside of OpenWRT
> so as to not impose any additional overhead that could affect your
> performance results.
>
> -JR
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