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Re: [ath9k-devel] ath9k, multiple stations, and AMPDUs

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On 09/21/2010 03:10 AM, Felix Fietkau wrote:
On 2010-09-21 7:25 AM, Ben Greear wrote:
I think I have narrowed down some problems I see when I create
two STA interfaces on the same radio and associate with the
same AP.

I'm using wireless-testing plus some patches to the rx logic
I posted earlier.

It appears that the ath9k NIC does not transport AMPDUs properly,
and after a few seconds, it's backlog is exhausted and the queues
are stopped in ath_tx_start.
ath9k currently looks up the sta by hw and not by vif on tx completion.
That completely breaks aggregation in such a setup. Unfortunately I
don't know an easy way to fix this yet.

This will be fixed by my sw aggregation rewrite, but I don't know when
I'll get that completed yet.

If you have any more details on this, please let me know.  I'm going to
attempt to fix it...I certainly have a good test case :)

Ben

--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc  http://www.candelatech.com
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