Return-path: Received: from mail-we0-f178.google.com ([74.125.82.178]:38084 "EHLO mail-we0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753246AbbBSV27 (ORCPT ); Thu, 19 Feb 2015 16:28:59 -0500 Received: by wesw55 with SMTP id w55so2240001wes.5 for ; Thu, 19 Feb 2015 13:28:58 -0800 (PST) MIME-Version: 1.0 In-Reply-To: References: From: Krishna Chaitanya Date: Fri, 20 Feb 2015 02:58:38 +0530 Message-ID: (sfid-20150219_222907_540544_14913882) Subject: Re: Connection issues with BW Tracking in mac80211 To: linux-wireless , Johannes Berg Content-Type: text/plain; charset=UTF-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Fri, Feb 20, 2015 at 1:00 AM, Krishna Chaitanya wrote: > Hi Johannes, > > The BW tracking feature in mac80211 is causing connection problems and > operating mode/bw problems when switching b/w modes and bw's in AP. > > For Eg. Initially if AP is operating in VHT-80MHz, and then we changed > in to HT-40MHz, mac80211 cannot handle it because the VHT capability > is mismatched b/w stored info (ifmgd->flags). > > I have tried your DISABLE_BW_TRACK patch, that helps making the > connection but it doesn't update the chipset causing issues. > > Ideally we should be able to handle all the config changes right? Before that i have a basic question? Should we reset our tracking after the connection is lost, in my case above the connection was lost (Config change in A triggers a reboot), still mac80211 is tracking the BW changes?