Re: [PATCH v3 1/1] mac80211: tell driver when dtim change detected

From: Johannes Berg <johannes@sipsolutions.net>
To: "Luis R. Rodriguez" <mcgrof@gmail.com>
Cc: "Guy, Wey-Yi" <wey-yi.w.guy@intel.com>,
	"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>,
	"j@w1.fi" <j@w1.fi>, Kalle Valo <kalle.valo@nokia.com>
Subject: Re: [PATCH v3 1/1] mac80211: tell driver when dtim change detected
Date: Mon, 25 Jan 2010 21:06:09 +0100	[thread overview]
Message-ID: <1264449969.23766.59.camel@johannes.local> (raw)
In-Reply-To: <43e72e891001251155l504a74fcpf20942682ca340c1@mail.gmail.com>

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On Mon, 2010-01-25 at 11:55 -0800, Luis R. Rodriguez wrote:

> > Although Bob has a point, we could change the way we pass the DTIM
> > period to the driver, only pass it in the powersave callbacks, and then
> > we could associate without it and just enable powersave only after
> > receiving a beacon. That assumes that drivers don't use it for anything
> > else though, of course, but I don't see anything else you could use it
> > for really.
> 
> Neat -- but that would mean doing the same for other beacon-sync IE
> information. What other stuff goes out in beacons that does not go
> into probe responses? I think I read a thread the other day about some
> WPS information.

Ah, yes, but that's a userspace thing -- and before association too.

I'll need to analyse this in more detail, and also what drivers do.

Kalle, could wl12x1 deal with getting the DTIM only when enabling PS?

johannes

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