[ath9k-devel] AR9390 tx hang.

[ath9k-devel] AR9390 tx hang.

[Metal Software]

Hello,

I have Freescale 1020 WLAN board with two Atheros AR9390 wlan cards. 
Board comes with Atheros binary which works quite well but I need to do 
some changes for our product so I decided to try with ath9k. I managed 
to compile and load all the modules in a board and I am getting two wlan 
interfaces.
First I decided use them as an station and associated to accesspoint. 
First basic test is just ping the accesspoint from board and that causes 
following problem.

ath: txq: ef9797dc axq_qnum: 2, mac80211_qnum: 2 axq_link: (null) pending frames: 124 axq_acq empty: 0 stopped: 1 axq_depth: 0  Attempting to restart tx logic.
ath: txq: ef9797dc axq_qnum: 2, mac80211_qnum: 2 axq_link: (null) pending frames: 124 axq_acq empty: 0 stopped: 1 axq_depth: 0  Attempting to restart tx logic.
ath: txq: ef9797dc axq_qnum: 2, mac80211_qnum: 2 axq_link: (null) pending frames: 124 axq_acq empty: 0 stopped: 1 axq_depth: 0  Attempting to restart tx logic.
... And this error continues as long as I shutdown the board.


This happens just after three successful ping packets.  Any idea?

I am using latest stable compat-wireless-2.6.39-rc1-3.tar.bz2 packet. I 
tried to use bleeding edge packet but I could not load ath9k.ko module.
And linux kernel is 2.6.32.

Yours,

Arsi Koutaniemi

[ath9k-devel] AR9390 tx hang.

[Mohammed Shafi]

On Thu, Apr 7, 2011 at 12:40 PM, Metal Software
<arsi.koutaniemi@metalsoftware.fi> wrote:
> Hello,
>
> I have Freescale 1020 WLAN board with two Atheros AR9390 wlan cards.
> Board comes with Atheros binary which works quite well but I need to do
> some changes for our product so I decided to try with ath9k. I managed
> to compile and load all the modules in a board and I am getting two wlan
> interfaces.
> First I decided use them as an station and associated to accesspoint.
> First basic test is just ping the accesspoint from board and that causes
> following problem.
>
> ath: txq: ef9797dc axq_qnum: 2, mac80211_qnum: 2 axq_link: (null) pending frames: 124 axq_acq empty: 0 stopped: 1 axq_depth: 0 ?Attempting to restart tx logic.
> ath: txq: ef9797dc axq_qnum: 2, mac80211_qnum: 2 axq_link: (null) pending frames: 124 axq_acq empty: 0 stopped: 1 axq_depth: 0 ?Attempting to restart tx logic.
> ath: txq: ef9797dc axq_qnum: 2, mac80211_qnum: 2 axq_link: (null) pending frames: 124 axq_acq empty: 0 stopped: 1 axq_depth: 0 ?Attempting to restart tx logic.
> ... And this error continues as long as I shutdown the board.
>
>
> This happens just after three successful ping packets. ?Any idea?
>
> I am using latest stable compat-wireless-2.6.39-rc1-3.tar.bz2 packet. I
> tried to use bleeding edge packet but I could not load ath9k.ko module.
> And linux kernel is 2.6.32.

The error message is obsolete in the latest code with this patch

commit a9cbe96d19861755680a712b709cccac5dc6aca8
Author: Felix Fietkau <nbd@openwrt.org>
Date:   Sat Mar 19 13:55:43 2011 +0100

    ath9k: remove the pending frames ath_txq_schedule workaround

    This workaround called ath_txq_schedule whenever there were still pending
    frames for a queue, but the queue depth was zero. Because of its its high
    false positive probability (e.g. with paused TIDs) and because it is in
    the way of other pending work (AP powersave fixes), it is better to remove
    this code entirely.

please check with the compat wireless dated 31 april, that might help
http://linuxwireless.org/download/compat-wireless-2.6/
further there are few power save fixes that are yet to be merged, you
can also try with these patches
https://patchwork.kernel.org/patch/689201/
https://patchwork.kernel.org/patch/689211/

if the issue still persists please report back to us

>
> Yours,
>
> Arsi Koutaniemi
>
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