Return-path: Received: from foo.birdnet.se ([213.88.146.6]:59364 "HELO foo.birdnet.se" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751355Ab0KAXMW (ORCPT ); Mon, 1 Nov 2010 19:12:22 -0400 Message-ID: <20101101231220.8591.qmail@stuge.se> Date: Tue, 2 Nov 2010 00:12:20 +0100 From: Peter Stuge To: =?utf-8?B?QmrDtnJu?= Smedman Cc: Ben Gamari , ath9k-devel@lists.ath9k.org, linux-wireless Subject: Re: [ath9k-devel] ath9k: race conditions in dma References: <8762whrqvm.fsf@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 In-Reply-To: Sender: linux-wireless-owner@vger.kernel.org List-ID: Björn Smedman wrote: > >> 1. TX DMA hangs under simultaneous high RX and TX load > >> 2. TX is completely hung but chip is never reset > > > > I have also observed both of these behaviors with just a standard > > hostapd single VIF configuration. > > Thanx Ben, it's a relief to know I'm not the only one suffering > from this. Just a note to confirm that I have also seen many different failures related to this. The lasting impression is that it's a big mess. I bought my first ath9k hardware roughly a year ago. That was totally useless as STA up until kernels a few months ago. I am now using an AR9280 card and for the very first time ath9k hardware and driver is actually working at all for me, but there are still issues as I noted in the other email. Unfortunately they're the kind of issues which can't be debugged much lacking strong knowledge of device internals. //Peter