Re: 3.7.6+: ath9k: tx logic locks up after taking attenuation very high.

[Ben Greear <greearb@candelatech.com>]

On 02/20/2013 09:41 PM, Ben Greear wrote:
> On 02/20/2013 05:38 PM, Sujith Manoharan wrote:
>> Ben Greear wrote:
>>> For instance, in this case, why do we have pending frames, the axq-stopped,
>>> and no axq depth?  Is that an invalid state to begin with?  Once
>>> it gets in the hung state, those numbers never change.  I'd assume
>>> something should be poking more packets out of the pending frames
>>> down into the axq logic?
>>
>> Something is broken in the xmit path, definitely.
>
> Ok, so here's a question:  In the ath_tx_complete method,
> the pending_frames counter is only decremented if txq == c->tx.txq_map[q].
>
> Maybe it should always be decremented?
>
> What kinds of things could cause txq to not equal the txq-map[q]?

I put in debugging code to check for that...and I can still reproduce
the hang without ever failing the txq == ct->tx.txq_map[q]
test..so problem is elsewhere it seems...

Ben

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