Re: ath: phy0: Failed to stop TX DMA, queues=0x001!

[Georgiewskiy Yuriy <bottleman@xxxxxxxxxx>]

On 2012-07-13 15:26 +0400, Georgiewskiy Yuriy wrote linux-wireless@xxxxxxxx...:

also update - i also try to test it with AP<->client mode, just start hostapd
on one node, remove antennas nad start iperf, in this case there is no errors
and link seems very more stable then i use mesh nodes, may be this is also
802.11s related too.

GY>
GY>Hi all again, seems i hit another bug, my test setup is a three mesh nodes,
GY>all in one room, two is alix pc engines with EMP9605H (ar9220) with antennas
GY>like on soho routers and one is my laptop with dbii f52n-pro ar9220 based
GY>too. Use compat-wireless-3.5-rc5-1-snpc on all nodes.
GY>
GY>All three nodes work fine, but then i remove antenas from one of the node (it
GY>contiue work only with pigtails) signal levels with this node is low but
GY>enough
GY>to work, it continue to work but i have errors in dmesg on all three nodes:
GY>
GY>ath: phy0: Failed to stop TX DMA, queues=0x001!
GY>
GY>Links is become unstable, packet loss regardless to which node taffic is
GY>goes,
GY>to node without antennas or betwen nodes with antennas.
GY>
GY>I tryin change wireless cards with no results, but all what i try is ar9220
GY>based, just different manufactures. Also i try add ubiquiti nanostation M2
GY>with openwrt
GY>on it in this setup, and get same results on it too - dma erros and unstable
GY>links with packetloss.
GY>
GY>Then i connect antennas back, all strat working fine again withous erorors.
GY>I think it seems low signal and/or low quality links is triggering with bug.
GY>
GY>I also trying use stock kernel 3.2.x and 3.4.x, compat-wireless bleeding
GY>edge, but no luck - same results.
GY>
GY>Please give any suggestions how i can help find a root case of this bug to
GY>resolve
GY>it?
GY>
GY>C уважением                       With Best Regards
GY>Георгиевский Юрий.                Georgiewskiy Yuriy
GY>+7 4872 711666                    +7 4872 711666
GY>факс +7 4872 711143               fax +7 4872 711143
GY>Компания ООО "Ай Ти Сервис"       IT Service Ltd
GY>http://nkoort.ru                  http://nkoort.ru
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GY>YG129-RIPE                        YG129-RIPE

C уважением                       With Best Regards
Георгиевский Юрий.                Georgiewskiy Yuriy
+7 4872 711666                    +7 4872 711666
факс +7 4872 711143               fax +7 4872 711143
Компания ООО "Ай Ти Сервис"       IT Service Ltd
http://nkoort.ru                  http://nkoort.ru
JID: GHhost@xxxxxxxxxx            JID: GHhost@xxxxxxxxxx
YG129-RIPE                        YG129-RIPE