From mboxrd@z Thu Jan  1 00:00:00 1970
From: Brian Walker <walkerbm@charter.net>
Date: Mon, 01 Mar 2010 19:55:51 -0500
Subject: [ath9k-devel] trouble with DWA-552 and ath9k
In-Reply-To: <1267227305.2835.1.camel@mj>
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	<4B51E8FC.9030304@charter.net> <1264028629.10023.26.camel@mj>	
	<4B5DE724.7000002@charter.net> <1264448097.10841.1.camel@mj>	
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	<4B8527E8.2080808@charter.net> <1267034980.9225.36.camel@mj>	
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To: ath9k-devel@lists.ath9k.org

On 02/26/2010 06:35 PM, Pavel Roskin wrote:
> On Thu, 2010-02-25 at 20:10 -0500, Brian Walker wrote:
>
>    
>> You do indeed appear to have the exact same DWA-552 as me. Is it
>> possible that the problem is with the way my older PIII AX63Pro
>> motherboard is interacting with the card? The only difference I see is
>> the latency on mine is 32 and not 168. Unfortunately, I believe it has
>> been too long (and I no longer have the box) to return this card.
>>      
> It can easily be the latency.  You can see the BIOS settings.  Some
> motherboards allow changing the PCI latency.  Try increasing it.
>
> I tried decreasing the PCI latency using setpci, but it didn't appear to
> work.
>
>    
>> What version of compat-wireless are you using and with what kernel and
>> on what distro?
>>      
> I'm using Fedora 11 with a kernel from the wireless-testing repository
> (currently identifying itself as "2.6.33-wl").
>
>    
Just used setpci -v -d *:* latency_timer=b0 to set the latency of all 
devices to 176, did a modprobe ath9k and an ifconfig wlan0 up. System 
didn't crash, but still getting:

ath: Failed to stop TX DMA in 100 msec after killing last frame
ath: Unable to stop TxDMA. Reset HAL!
ath: timeout (100000 us) on reg 0x7000: 0xffffffff & 0x00000003 != 
0x00000000
ath: Chip reset failed
ath: Unable to reset hardware; reset status -22
ath: DMA failed to stop in 10 ms AR_CR=0xffffffff AR_DIAG_SW=0xffffffff
ath: timeout (100000 us) on reg 0x7000: 0xffffffff & 0x00000003 != 
0x00000000
ath: Chip reset failed
ath: Unable to reset channel (2412 Mhz) reset status -22
ath: Unable to set channel

Brian