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Re: [PATCH 2/2] mac80211: make listen_interval be configurable by low level driver

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On Tue, Jul 15, 2008 at 11:41 AM, Johannes Berg
<johannes@xxxxxxxxxxxxxxxx> wrote:
> On Tue, 2008-07-15 at 11:29 +0300, Tomas Winkler wrote:
>
>> We are providing power save user interface reach enough to specify all
>> the above requirements.
>> I think you are both misinterpreting listen interval meaning.
>> Listen interval merely says to AP for how many beacons save direct
>> packets for this STA. It doesn't mean
>> it's can be shorter and it  does say it's won't be longer.
>
> Right, but it does make sense to advertise what we're using, and this
> patch just adds a strict "driver tells mac80211 what it's using" flow.
> That's mostly what I'm objecting to. If you were calling the variable
> "max_listen_interval" and having mac80211 send it back to the driver in
> the BSS config as bssconf->listen_interval, and, for now, simply use the
> max, I wouldn't have a problem with it.

Okay will work for me, although I think it's just overhead in this
stage and  I doubt it will ever be utilized.
Will submit V2

>> It's
>> doesn't affect power save dynamics it's just sets upper limit.
>> This value for iwlwifi hw is derived from maximal supported  beacon
>> interval and size of the internal HW timers.
>> This value is hard coded in the driver.
>
> Shouldn't it depend on the beacon interval then?

Yes, but why to complicate things if not needed.
Tomas
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