Return-path: Received: from [119.255.1.60] ([119.255.1.60]:48284 "EHLO mail.watchdata.com.cn" rhost-flags-FAIL-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1759372Ab2AGCMd (ORCPT ); Fri, 6 Jan 2012 21:12:33 -0500 Received: from localhost (mail.watchdata.com.cn [127.0.0.1]) by mail.watchdata.com.cn (Postfix) with SMTP id CDA592005F for ; Sat, 7 Jan 2012 10:01:51 +0800 (CST) From: =?gb2312?B?wO641Q==?= To: , "'Ath9k Devel List'" Subject: Question about duration of data frame in ath9k_htc Date: Sat, 7 Jan 2012 10:11:13 +0800 MIME-Version: 1.0 Content-Type: text/plain; charset="gb2312" In-Reply-To: Message-Id: <20120107020151.B53C81FFF8@mail.watchdata.com.cn> (sfid-20120107_031237_478087_7CBC738D) Sender: linux-wireless-owner@vger.kernel.org List-ID: Hi Sirs, From wireshark, I noticed that when send an data frame , the duration of frame control is fixed at 60 , no matter the frame length is 100 bytes or 1000 bytes. It seems this value is calculated in firmware and should be correct. But I don't know why. And this value can be set in mac80211? Thanks in advance! Li gang