Return-path: Received: from crystal.sipsolutions.net ([195.210.38.204]:51102 "EHLO sipsolutions.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755806AbXJIRkL (ORCPT ); Tue, 9 Oct 2007 13:40:11 -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: <200710091954.03727.IvDoorn@gmail.com> (sfid-20071009_183751_027972_F8EC7689) References: <200710052319.10600.linux@baker-net.org.uk> <200710091932.45235.IvDoorn@gmail.com> <1191950973.4013.45.camel@johannes.berg> <200710091954.03727.IvDoorn@gmail.com> (sfid-20071009_183751_027972_F8EC7689) Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-POK4cDNa5ybj4K5uKFKE" Date: Tue, 09 Oct 2007 19:40:52 +0200 Message-Id: <1191951652.4013.48.camel@johannes.berg> (sfid-20071009_184036_217304_45A6D1CA) Mime-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: --=-POK4cDNa5ybj4K5uKFKE Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Tue, 2007-10-09 at 19:54 +0200, Ivo van Doorn wrote: > > Well, it's not too strange that it has two places since there's the SIF= S > > too which is needed for ACK/CTS timing, these packets aren't sent from > > the host so you can't have those timings in a per-packet descriptor. >=20 > You mean things like ACK_TIMEOUT, those are all seperate registers in the= Ralink hardware. No, I'm not talking about the ack timeout, I'm thinking of the short interframe space (SIFS) which you wait after receiving a packet before sending the ACK. > ButI think I should be more clearer on this, rt2500pci and rt2500usb are > basically the same chipset but only the bus type is different. > What is notable is that _only_ rt2500usb has this IFS register, none of t= he > other Ralink chipsets (including rt2500pci) have it. That is indeed strange. > True, but in G mode you are compatible with B. The legacy driver doesn't > switch back to B mode when the AP is in B mode. This means that it will > be using the G timing values. That sounds wrong. johannes --=-POK4cDNa5ybj4K5uKFKE Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Comment: Johannes Berg (powerbook) iQIVAwUARwu9IqVg1VMiehFYAQLwxw/7BfQPftsCcJ9d5OS27hmO6YTEKEAUwdbb E3/2dllowOFePWoK/T0sNxyw67kW3UGc8UIDdwAFZzj53ao4YEPrHzU3EdHWHbB/ zikNLPiC/Vg+JsgqAZBysQ91ZN9E4DNqk0MuYuHDfsmGj33hcxpBV7ktEq4jvgIs m5T4bx9ESYpv8iH8kXWtNMznJ8xqCUBCfLKPv1vEF6p4fg0ndZk4AgmcJtuYEfCE B2cv6v91awc5zInFUxV7k2Cx1Q7d3jG+N/myPeV6D8ku705/PLNs3JGc72oHTF+5 3FSNXm9+0L5ls88+tunitpj0M7I0nWEZSKcBwXf5t8MW+S/FAtB7HvxxBttrx936 iRZdTtvfrubTqxuhKOvlEPBJ9uIUmvvFPnsnaS8cAvK6I27hhNvbUHMlhbBngDQU KUGemBFCjcLpb5jdAWgwtpF0Y1FSM1r2eOtQuDH3Zd0E4W3pra7/x4SyUe+wjtQn ehFP87D9ch6yHdlhLUxJJ7+1stwnrFescQJMaxBvVpNxx80Du11KwVkhOd11Ui8X zd/qO56S8Ftfwk2ZaWW52cezNS5q5ahhDaXr3rqBh9RDTmgg+KeHX2ytPwu5CmWB aTjk87TkDM2lH00Tn6KeM+NFVb/O21xRw0s0gYnEnCj4d6mzwVvBe47ic+1akY81 k84wI6jsrT8= =NFlH -----END PGP SIGNATURE----- --=-POK4cDNa5ybj4K5uKFKE--