From mboxrd@z Thu Jan 1 00:00:00 1970 From: Cyril Chemparathy Subject: Re: [PATCH v3 00/10] split out emac cpdma and mdio for reuse Date: Mon, 13 Sep 2010 10:09:15 -0400 Message-ID: <4C8E308B.7020003@ti.com> References: <1283891142-15522-1-git-send-email-cyril@ti.com> <4C8950D4.9060102@criticallink.com> <201009101823.52755.caglarakyuz@gmail.com> <201009111154.42171.caglarakyuz@gmail.com> Reply-To: cyril@ti.com Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from devils.ext.ti.com ([198.47.26.153]:51097 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754608Ab0IMOJT (ORCPT ); Mon, 13 Sep 2010 10:09:19 -0400 In-Reply-To: <201009111154.42171.caglarakyuz@gmail.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: Caglar Akyuz Cc: Michael Williamson , Kevin Hilman , "netdev@vger.kernel.org" , "davinci-linux-open-source@linux.davincidsp.com" , "linux-omap@vger.kernel.org" Hi Caglar, [...] > Unfortunately emac driver is not stable after this series. I face lock-ups > time to time, followed by attached kernel trace. Could you elaborate on your test scenario so that I can try and reproduce the problem at my end? Also, did you have the contents of my commit stack in this particular kernel build? Assuming that the DMA got stuck at some point leading up to the transmit timeout, any ideas as to why a host error was not thrown? To help debug, I'll post out a set of patches that dump out the MAC (and DMA) registers on timeout. That should give us some visibility into the problem. > [ 1651.440000] nfs: server 192.168.2.34 not responding, still trying > [ 1859.010000] ------------[ cut here ]------------ > [ 1859.010000] WARNING: at net/sched/sch_generic.c:258 > dev_watchdog+0x184/0x294() > [ 1859.020000] NETDEV WATCHDOG: eth0 (davinci_emac): transmit queue 0 timed > out [...] Regards Cyril.