Return-path: Received: from crystal.sipsolutions.net ([195.210.38.204]:39795 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753176AbXJISEy (ORCPT ); Tue, 9 Oct 2007 14:04:54 -0400 Subject: Re: [Rt2400-devel] Mode selection in mac80211 From: Johannes Berg To: Ivo van Doorn Cc: rt2400-devel@lists.sourceforge.net, Adam Baker , "Luis R. Rodriguez" , linux-wireless@vger.kernel.org In-Reply-To: <200710092018.28113.IvDoorn@gmail.com> (sfid-20071009_190220_636461_94582DFE) References: <200710052319.10600.linux@baker-net.org.uk> <200710091954.03727.IvDoorn@gmail.com> <1191951652.4013.48.camel@johannes.berg> <200710092018.28113.IvDoorn@gmail.com> (sfid-20071009_190220_636461_94582DFE) Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-C+vko/i/bcgYntkQgW0r" Date: Tue, 09 Oct 2007 20:05:34 +0200 Message-Id: <1191953134.4013.50.camel@johannes.berg> (sfid-20071009_190456_304611_40827C19) Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: --=-C+vko/i/bcgYntkQgW0r Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Tue, 2007-10-09 at 20:18 +0200, Ivo van Doorn wrote: > > > True, but in G mode you are compatible with B. The legacy driver does= n't > > > switch back to B mode when the AP is in B mode. This means that it wi= ll > > > be using the G timing values. > >=20 > > That sounds wrong. >=20 > Not really, this would be the same behavior that you suggested earlier, > when you stated that a driver should perhaps not register 802.11B mode > when also registering 802.11G mode since it is backward compatible. Well, in that was the assumption that mac80211 tells the driver whether to enable shortslot or not regardless of B/G mode. It is only perfectly compatible when B slot timing is used. johannes --=-C+vko/i/bcgYntkQgW0r Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Comment: Johannes Berg (powerbook) iQIVAwUARwvC7aVg1VMiehFYAQKRiA//XGvrOwcDBE+FOMrnz2urwrRMdfHUQjpM TCkb03edHN368bLUdBTH/SKj5OWfh9IFP0Dba+5nlteqaiy8WRQjYrS37Yk0RvAH tmb9B3OujPwQqrzCorogPPduRNrb2myXiAQBLPBW9tkqsYEtGJoidcsXjwfCsAFz g1dh22nsy7qcA4TQOUv1vOUxuXVn7+79czFvpL+gJGdL+Ub30GeF0ClRucV43of5 vVEJrbf1cKus5JPpAHX69GdgusO8GfoIvCBoVrFKw8hV3gFsSQ4N+DjnF+hxsoD4 00i6mekabcXt7v44V7+z08G7zc/Zjv+MAzUhYKjsmQDwusywGXHiax3WI24h8KuY HyfeZQ0dVrRN9iswbqtn2iUBZtUK5vQzdPfczAeZBld9tFtWHr6hAhwoY9zxZ8Te hylIf2Eddk5CEL+B76UWQxbJmLr7jB/Kh0oqiBmXuOzTIeb3iLONG1HtRuyPZUen t8wUtjmKGbiw8nLjwzG0YGRuvx3xbPa4wrmLMjO0+OAU/BFkOhDAtLujwQ8VLGEz mFGYNgiHhmApOtNKCEa3O5/keGgdzc7qqGzWRxFnqLWlQ8gOcHOCFgqM2ppzNw3+ GJ7z5aoXtP11zy0YJoyJ2nDGnUrrDKGWvJmgLif69Qzxeym/LJJGjweVTKkEtwxr VA09YMArF10= =3l0J -----END PGP SIGNATURE----- --=-C+vko/i/bcgYntkQgW0r--