Re: [PATCH] Revert "ath9k: Calculate sleep duration"

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On Thu, Sep 11, 2014 at 07:56:31PM +0530, Sujith Manoharan wrote:
> Rajkumar Manoharan wrote:
> > Some of the IOE customer using ath9k with power save enabled. IIRC the
> > expectation is that when the station is idle, it should wakeup on DTIM
> > beacon not for every beacons. Are you seeing frequest bmiss events on
> > higher beacon interval?
> 
> I don't think ath9k has ever been tested with longer sleep durations
> based on dtim period. We have always programmed the hardware to wake up
> for every beacon interval, using the TIM_TIMER interrupt. And since the
> TIM bit needs to be checked for every beacon, the sleep duration has
> to be the beacon interval.
> 
> Also, the bmiss threshold needs to be adjusted based on the sleep
> duration. We are hardcoding it currently in the driver using
> ATH_DEFAULT_BMISS_LIMIT. This will break, too.
> 
> Using dtim for PS needs more testing before it can be used,
> so we can have the original behavior for now.
> 
Sounds clear.

Acked-by: Rajkumar Manoharan <rmanohar@xxxxxxxxxxxxxxxx>
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