Return-path: Received: from nbd.name ([46.4.11.11]:36601 "EHLO nbd.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753221Ab1HYPgH (ORCPT ); Thu, 25 Aug 2011 11:36:07 -0400 Message-ID: <4E566BE3.3080907@openwrt.org> (sfid-20110825_173620_102133_30A91475) Date: Thu, 25 Aug 2011 17:36:03 +0200 From: Felix Fietkau MIME-Version: 1.0 To: Rajkumar Manoharan CC: linville@tuxdriver.com, linux-wireless@vger.kernel.org Subject: Re: [PATCH 2/2] ath9k_hw: Fix slottime with coverage class References: <1314283522-6143-1-git-send-email-rmanohar@qca.qualcomm.com> <1314283522-6143-2-git-send-email-rmanohar@qca.qualcomm.com> In-Reply-To: <1314283522-6143-2-git-send-email-rmanohar@qca.qualcomm.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: On 2011-08-25 4:45 PM, Rajkumar Manoharan wrote: > The commit b6ba41bb27eb9810d54e2301355ce56fd0e94a1a updates > acktimeout wihout updating slottime when coverage class is defined > as per IEEE 802.11-2007 17.3.8.6. > > Signed-off-by: Rajkumar Manoharan I intentionally left the coverage class out of the hw slot time setting, because increasing slot time too much causes severe throughput issues. I've observed this even with relatively minor coverage class settings (e.g. for 2 km) on AR9160 and AR9280. I haven't tested AR9380 though. - Felix