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From: Sujith Manoharan <c_manoha@qca.qualcomm.com>
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Date: Mon, 19 Mar 2012 16:02:11 +0530
To: Johannes Berg <johannes@sipsolutions.net>
CC: "Manoharan, Rajkumar" <rmanohar@qca.qualcomm.com>,
	linux-wireless <linux-wireless@vger.kernel.org>
Subject: RE: mac80211 20/40 coexist
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Johannes Berg wrote:
> > 11.14.4.3 specifies that if the operating bandwidth has been changed by the AP
> > to 20 MHz, then transmitting frames in an extension channel is not allowed ?
> 
> Ok, good point. Paul's case was regulatory related, where we
> (voluntarily) ceased 40 MHz transmissions.
> 
> Still though, I think reconfiguring the channel type rather than the
> rate control algorithm doesn't make a lot of sense in this case since
> it'd make this very special and unlike the other cases (e.g. AP mode).

The regulatory issue could have been fixed by sending out the action frame
specified in 7.4.10.2, no ?

Sujith