Re: Powersave broken on p54

[Luciano Coelho <coelho@ti.com>]

On Fri, 2011-03-04 at 09:03 +0200, Luciano Coelho wrote:
> On Wed, 2011-03-02 at 18:17 +0100, Michael Buesch wrote:
> > On Wed, 2011-03-02 at 18:13 +0100, Christian Lamparter wrote:
> > > sure there was the rssi->dbm update (I hope you've already updated
> > > your eeprom image.)
> > 
> > What change to the eeprom is needed? My eeprom doesn't
> > contain any rssi info (see recent NULL ptr fix).
> > 
> > > No idea, it looks like the ps-poll is broken, because
> > > "iwconfig wlanX power timeout 10" fixes the long delays
> > > almost immediately. [let's see if there's more]
> > 
> > So maybe it's a generic mac80211 bug? Are there other
> > devices with PS issues?
> 
> We have been having some problems with PSM on the wl12xx driver too.  It
> seems that it broke in the past couple of weeks as well.  So this is
> most likely a problem in mac80211.  I'll try to investigate this a bit
> more too.

I've been investigating this problem a bit more and it seems that the
symptom, at least, is that when we receive data with the
more-data-buffered flag set, we immediately send a PS-poll which enables
PS mode again.  My guess is that it shouldn't send PS-poll but a
null-frame with PS mode off.

I still need to refresh my PSM knowledge a bit more before I can
continue studying this. ;)


-- 
Cheers,
Luca.