From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757361AbXD0VrO (ORCPT ); Fri, 27 Apr 2007 17:47:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757341AbXD0VrO (ORCPT ); Fri, 27 Apr 2007 17:47:14 -0400 Received: from gherkin.frus.com ([192.158.254.49]:59503 "EHLO gherkin.frus.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757358AbXD0VrL (ORCPT ); Fri, 27 Apr 2007 17:47:11 -0400 Subject: BAD_SG_DMA panic in aha1542 To: linux-kernel@vger.kernel.org Date: Fri, 27 Apr 2007 16:47:09 -0500 (CDT) CC: linux-scsi@vger.kernel.org X-Mailer: ELM [version 2.4ME+ PL82 (25)] MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII Message-Id: <20070427214709.DC44BDBA2@gherkin.frus.com> From: rct@gherkin.frus.com (Bob Tracy) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I previously reported an ISA DMA issue for the 2.6.12 kernel. The issue persists through at least 2.6.18. SCSI controller is an Adaptec AHA-1542B (ISA). The action "mount -t iso9660 /dev/scd0 /mnt/cdrom -r" produces (cdrom detection messages as various modules autoload, then...) sgpnt[0:1] page c1ee5af0/0x1ee5af0 length 32 Kernel panic - not syncing: Buffer at physical address > 16 Mb used for aha1542 As before, no problems using the sda hard disk (which is the boot drive): everything works reliably until I touch the cdrom drive. I'll be happy to assist with the debugging, but the system with the aha1542 has no development facilities, i.e., I'll have to build test kernels on a different system, and turnaround is going to be slow :-(. Thanks in advance for helping me get this old machine working again. No issues with 2.4 kernels. I have no idea about 2.5 kernels and 2.6 kernels prior to 2.6.12. As for why I didn't report this before now, the aha1542b was in my parts bin until I cobbled a system together approx. two weeks ago, mostly to see if a useful system could still be had using legacy hardware and modern GNU/Linux software. I'm happy to report the answer is mostly "yes". -- ----------------------------------------------------------------------- Bob Tracy WTO + WIPO = DMCA? http://www.anti-dmca.org rct@frus.com -----------------------------------------------------------------------