Return-path: Received: from mail-bk0-f45.google.com ([209.85.214.45]:56420 "EHLO mail-bk0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751767Ab3EEPm7 convert rfc822-to-8bit (ORCPT ); Sun, 5 May 2013 11:42:59 -0400 Received: by mail-bk0-f45.google.com with SMTP id je9so1279466bkc.18 for ; Sun, 05 May 2013 08:42:58 -0700 (PDT) From: Christian Lamparter To: =?iso-8859-15?q?Rub=E9n_Porras?= Subject: Re: Carl9170 is working very slow (linux 3.6.9 and WN111(v2)) Date: Sun, 5 May 2013 17:42:58 +0200 Cc: linux-wireless@vger.kernel.org References: In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-15" Message-Id: <201305051742.58822.chunkeey@googlemail.com> (sfid-20130505_174303_767117_536C42C9) Sender: linux-wireless-owner@vger.kernel.org List-ID: Hello Rub?n, On Sunday, May 05, 2013 03:20:30 PM Rub?n Porras wrote: > the module carl9170 is working very slow in linux version 3.6.9 with the > dongle WN111(v2), although I am able to transmit/receive information for a > while using it, eventually the transmission hangs and it is not possible to > send any data, and I must reset the connection (ifdown wlan0 and ifup > wlan0). Several warnings follows which are available in the kernel > messages, which probably help to track the problem. If it helps to track > the problem I can test any patches you send me. > > PD: From the post https://forum.openwrt.org/viewtopic.php?id=43243 I > suppose that I am not the only one having the problem. > > [ 25.543551] ------------[ cut here ]------------ > [ 25.543570] WARNING: at drivers/net/wireless/ath/carl9170/tx.c:992 > carl9170_op_tx+0x1f0/0x72f [carl9170]() Ah, this sounds familiar. The good news is that the interoperability problem between minstrel_ht and carl9170 was discovered and fixed back in February already [the mainline is not affected]. If you know how to apply patches and compile drivers, then you can easily fix it yourself by applying the following patch: "carl9170: fix frame drop and WARN due to minstrel_ht change" and compile the new carl9170 module. Regards, Christian BTW: I assume you are also running some version of openwrt. Is this correct? Can you tell me which one? Since if this affects a stable release, we should notify the OpenWRT folks, so they can take action.