From owner-svn-src-head@FreeBSD.ORG Tue Nov 12 04:57:32 2013 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 72EBB3B1; Tue, 12 Nov 2013 04:57:32 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 62B4C3EE7; Tue, 12 Nov 2013 04:57:32 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.7/8.14.7) with ESMTP id rAC4vWot076349; Tue, 12 Nov 2013 04:57:32 GMT (envelope-from adrian@svn.freebsd.org) Received: (from adrian@localhost) by svn.freebsd.org (8.14.7/8.14.5/Submit) id rAC4vW1X076348; Tue, 12 Nov 2013 04:57:32 GMT (envelope-from adrian@svn.freebsd.org) Message-Id: <201311120457.rAC4vW1X076348@svn.freebsd.org> From: Adrian Chadd Date: Tue, 12 Nov 2013 04:57:32 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r258031 - head/sys/dev/iwn X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Nov 2013 04:57:32 -0000 Author: adrian Date: Tue Nov 12 04:57:31 2013 New Revision: 258031 URL: http://svnweb.freebsd.org/changeset/base/258031 Log: Comment what 'mimo' does in the link quality table. Modified: head/sys/dev/iwn/if_iwn.c Modified: head/sys/dev/iwn/if_iwn.c ============================================================================== --- head/sys/dev/iwn/if_iwn.c Tue Nov 12 04:56:00 2013 (r258030) +++ head/sys/dev/iwn/if_iwn.c Tue Nov 12 04:57:31 2013 (r258031) @@ -4368,7 +4368,17 @@ iwn_set_link_quality(struct iwn_softc *s plcp = iwn_rate_to_plcp(sc, ni, rate); linkq.retry[i] = plcp; - /* Special case for dual-stream rates? */ + /* + * The mimo field is an index into the table which + * indicates the first index where it and subsequent entries + * will not be using MIMO. + * + * Since we're filling linkq from 0..15 and we're filling + * from the higest MCS rates to the lowest rates, if we + * _are_ doing a dual-stream rate, set mimo to idx+1 (ie, + * the next entry.) That way if the next entry is a non-MIMO + * entry, we're already pointing at it. + */ if ((le32toh(plcp) & IWN_RFLAG_MCS) && RV(le32toh(plcp)) > 7) linkq.mimo = i + 1;