[Voyage-linux] regarding support for AR922X atheros cards

[Frank Hoeflich]

Srini:
    Read these (the first one is labelled as a dup of the second):
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/568189https://bugs.launchpad.net/ubuntu/+source/linux/+bug/561125
You are using a much newer Linux in Voyage 0.8.0, so I'd suggest trying a different version of the ath9k driver module, preferably based on significantly older or newer code if possible.  Best of luck
--Frank
--- On Fri, 3/23/12, srinivas prasad <wasimprasad at gmail.com> wrote:
From: srinivas prasad <wasimprasad at gmail.com>
Subject: [Voyage-linux] regarding support for AR922X atheros cards
To: voyage-linux at voyage.hk
Date: Friday, March 23, 2012, 7:48 PM

hi,I am using voyage-0.8.0 OS which has 3.0.0-voyage as kernel and it is installed in ALIX node. I am using AR922X wireless cards from atheros and compat wireless's(3.1.1.1-1) ath9k as driver. I am getting into an issue when subjecting the cards to stress. Whenever I try to send traffic at the rate of 54 MBps between two alix nodes (one as AP and one as client), the traffic initially proceeds normally for around 5-10 minutes. After that, the AP disconnects from the client and the client can never again associate back with the AP. I need to restart hostapd and then only reconnect. I tried different cards that interface with ath9k and I get the same result, so I am assuming that it must be a problem with the driver or kernel.

I get the following error message in the kernel. I dont know if the below message is a consequence of the card stopping to work for some reason.Mar 23 22:42:04 voyage kernel: [ 2569.011358] ath reset
Mar 23 22:42:04 voyage kernel: [ 2569.019484] ath: Failed to stop TX DMA!Mar 23 22:42:04 voyage kernel: [ 2569.423631] ath resetMar 23 22:42:04 voyage kernel: [ 2569.424602] ath: Failed to stop TX DMA!
Mar 23 22:42:04 voyage kernel: [ 2569.453000] ath: DMA failed to stop in 10 ms AR_CR=0x00000024 AR_DIAG_SW=0x42000020 DMADBG_7=0x00006040Mar 23 22:42:04 voyage kernel: [ 2569.453101] ath: Could not stop RX, we could be confusing the DMA engine when we start RX up

Can this be a bug in the voyage kernel? If so, is there a patch I can apply? It will be really useful if anyone can offer insights into this.
Thank youSrinivas

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