From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 18 May 2002 12:40:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 18 May 2002 12:40:53 -0400 Received: from elixir.e.kth.se ([130.237.48.5]:62216 "EHLO elixir.e.kth.se") by vger.kernel.org with ESMTP id ; Sat, 18 May 2002 12:40:52 -0400 To: Andre Hedrick Cc: =?iso-8859-1?q?M=E5ns_Rullg=E5rd?= , Alan Cox , linux-kernel@vger.kernel.org Subject: Re: ide cd/dvd with 2.4.19-pre8 In-Reply-To: From: mru@users.sourceforge.net (=?iso-8859-1?q?M=E5ns_Rullg=E5rd?=) Date: 18 May 2002 18:39:16 +0200 Message-ID: User-Agent: Gnus/5.0807 (Gnus v5.8.7) XEmacs/21.1 (Channel Islands) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andre Hedrick writes: > The driver pulled your system back into safe data io ranges. > Either your cable routing is poor, your power supply is marginal, possible > but not likely (hardware combination does not like the odd or even cable > grounding setup), regardless it did the correct thing. > > The problem is a feature to prevent the driver from dropping out of DMA > to PIO when it is better to down grade the transfer rate. > > The next issue is whether your ATAPI is in DMA, and it should not be. > The driver core does not use split dma engines yet. I just tried connecting it to a cmd646 controller. It runs at full speed but no dma because of cmd bugs. Is there a problem with the new pdc202xx driver in 2.4.19 or is it somehow my fault? -- Måns Rullgård mru@users.sf.net