From mboxrd@z Thu Jan 1 00:00:00 1970 From: linas@austin.ibm.com (Linas Vepstas) Subject: Re: [RFT] hpt366: reset DMA state machine on timeouts Date: Fri, 22 Jun 2007 11:03:06 -0500 Message-ID: <20070622160306.GF8840@austin.ibm.com> References: <200706212154.47398.sshtylyov@ru.mvista.com> <20070622151359.GD8840@austin.ibm.com> <20070622165431.3b4997f7@the-village.bc.nu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from e33.co.us.ibm.com ([32.97.110.151]:56515 "EHLO e33.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756279AbXFVQDI (ORCPT ); Fri, 22 Jun 2007 12:03:08 -0400 Received: from d03relay04.boulder.ibm.com (d03relay04.boulder.ibm.com [9.17.195.106]) by e33.co.us.ibm.com (8.13.8/8.13.8) with ESMTP id l5MG38nJ029579 for ; Fri, 22 Jun 2007 12:03:08 -0400 Received: from d03av04.boulder.ibm.com (d03av04.boulder.ibm.com [9.17.195.170]) by d03relay04.boulder.ibm.com (8.13.8/8.13.8/NCO v8.3) with ESMTP id l5MG371h144938 for ; Fri, 22 Jun 2007 10:03:07 -0600 Received: from d03av04.boulder.ibm.com (loopback [127.0.0.1]) by d03av04.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id l5MG373e014293 for ; Fri, 22 Jun 2007 10:03:07 -0600 Content-Disposition: inline In-Reply-To: <20070622165431.3b4997f7@the-village.bc.nu> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Alan Cox Cc: Sergei Shtylyov , linux-ide@vger.kernel.org On Fri, Jun 22, 2007 at 04:54:31PM +0100, Alan Cox wrote: > > I'm not sure what to do if this had been the only disk in the system. > > Maybe if the eror reate exceed 100/minute, then dma is turned off > > permanently? > > Turn off UDMA and you turn off cable side error protection, so if your > error is caused by noise you just did the electronic version of a long > walk off a short pier. Right. Yes. Clearly, I must be debugging with half a brain, here. --linas