From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.candelatech.com ([208.74.158.172]:46994 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753009Ab1L3PRv (ORCPT ); Fri, 30 Dec 2011 10:17:51 -0500 Message-ID: <4EFDD61D.6050008@candelatech.com> (sfid-20111230_161754_735863_18FD154D) Date: Fri, 30 Dec 2011 07:17:49 -0800 From: Ben Greear MIME-Version: 1.0 To: Naoyuki Tai CC: linux-wireless@vger.kernel.org Subject: Re: ath9k: Failed to stop TX DMA!, DMA failed to stop in 10 ms References: <4EFD5E40.3020606@smartfruit.com> In-Reply-To: <4EFD5E40.3020606@smartfruit.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: On 12/29/2011 10:46 PM, Naoyuki Tai wrote: > Hello, > > I've spent some time on ath9k driver getting stuck. > I set up a new system with OpenWRT, and the atheros AR922X had the problem. > I've gone through http://linuxwireless.org/en/users/Drivers/ath9k/bugs, and decided to give a go around with newer driver. > I went the route of Debian wheezy, so that I can use the updated compat-wireless more easily. > The current system is > Linux ntai11d 3.1.0-1-486 #1 Sun Dec 11 19:52:34 UTC 2011 i586 GNU/Linux Did you try any older kernels, maybe stock 3.0, to see if it's a recently added problem? The scan and off-channel optimizations that I did originally helped work around these problems in my own testing, but my optimizations were complex and had some other bugs and were removed recently. It's possible that helps expose the DMA issues again... Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com