Subject: Re: [PATCH 1/1] mac80211: send action frame when toggling SM PS
	mode
From: Johannes Berg <johannes@sipsolutions.net>
To: Tomas Winkler <tomas.winkler@intel.com>
Cc: linville@tuxdriver.com, yi.zhu@intel.com,
	linux-wireless@vger.kernel.org,
	Emmanuel Grumbach <emmanuel.grumbach@intel.com>
In-Reply-To: <1222618493-19019-1-git-send-email-tomas.winkler@intel.com>
References: <1222618493-19019-1-git-send-email-tomas.winkler@intel.com>
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Date: Sun, 28 Sep 2008 18:19:29 +0200
Message-Id: <1222618769.7064.0.camel@johannes.berg> (sfid-20080928_181949_544577_58025ED2)
Mime-Version: 1.0
Sender: linux-wireless-owner@vger.kernel.org


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On Sun, 2008-09-28 at 19:14 +0300, Tomas Winkler wrote:
> From: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
>=20
> This patch makes mac80211 able to send action frames when toggling
> (SM PS) Spacial Multiplexing Power Save mode.
>=20
> Example:
> 1.
> Low lever driver may close some of RX chains in power save mode
> and needs to announce to AP that a RTS frame is need in order to wake all
> RX chains, on other hand SM PS can be disabled on CAM mode or if HW is ab=
le
> to wake all chains without RTS frame.
>=20
> 2.
> iwlwifi can call this function when it detects that only
> one antenna can effectively receive then MS PS mode is set to STATIC and
> AP is asked not to send MIMO rates packets.

Why is the driver managing the PS mode to start with?

johannes

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