Return-path: Received: from mx1.redhat.com ([209.132.183.28]:43179 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759185Ab3GaI4v (ORCPT ); Wed, 31 Jul 2013 04:56:51 -0400 Date: Wed, 31 Jul 2013 10:59:56 +0200 From: Stanislaw Gruszka To: Andy Isaacson Cc: Johannes Berg , linux-wireless@vger.kernel.org, netdev@vger.kernel.org, Arkadiusz Miskiewicz Subject: Re: 3.10, iwlwifi 6200AGN: AP changed bandwidth in a way we can't support - disconnect Message-ID: <20130731085956.GC1681@redhat.com> (sfid-20130731_105708_012894_093D00EA) References: <20130729163452.GA454@hexapodia.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20130729163452.GA454@hexapodia.org> Sender: linux-wireless-owner@vger.kernel.org List-ID: On Mon, Jul 29, 2013 at 09:34:52AM -0700, Andy Isaacson wrote: > After upgrading to 3.10.4 and traveling to Europe I'm often suffering > from failures to associate with the following in dmesg: > > [ 37.351621] wlan0: authenticate with 64:70:02:e6:a6:ba > [ 37.364701] wlan0: send auth to 64:70:02:e6:a6:ba (try 1/3) > [ 37.366358] wlan0: authenticated > [ 37.368543] wlan0: associate with 64:70:02:e6:a6:ba (try 1/3) > [ 37.372765] wlan0: RX AssocResp from 64:70:02:e6:a6:ba (capab=0x431 status=0 aid=8) > [ 37.380190] wlan0: associated > [ 37.438935] wlan0: AP 64:70:02:e6:a6:ba changed bandwidth, new config is 2447 MHz, width 1 (2447/0 MHz) > [ 37.438941] wlan0: AP 64:70:02:e6:a6:ba changed bandwidth in a way we can't support - disconnect > > I hacked the driver to do > > - "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n", > + "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz) flags %x/%x\n", > ifmgd->bssid, chandef.chan->center_freq, chandef.width, > - chandef.center_freq1, chandef.center_freq2); > + chandef.center_freq1, chandef.center_freq2, flags, ifmgd->flags); > > and > > - if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | > + if ((flags != 0x810 && ifmgd->flags != 0x804) && ( > + flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT | > > and the result is a working link with We have few reports about this. Johannes, proposed this patch http://p.sipsolutions.net/9d1dd0734d2c3a7a.txt Could you check if it fixes the problem for you? Stanislaw