From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 12 Jun 2001 20:47:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 12 Jun 2001 20:47:02 -0400 Received: from cr545978-a.nmkt1.on.wave.home.com ([24.112.25.43]:18181 "HELO saturn.tlug.org") by vger.kernel.org with SMTP id ; Tue, 12 Jun 2001 20:46:49 -0400 Date: Tue, 12 Jun 2001 20:46:47 -0400 From: Mike Frisch To: linux-kernel@vger.kernel.org Subject: IRQ problems w/VIA Apollo VP2/97 & NCR 53c875 Message-ID: <20010612204647.A14088@saturn.tlug.org> Mail-Followup-To: Mike Frisch , linux-kernel@vger.kernel.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Summary: IRQ conflict on VIA Apollo VP2/97-based motherboard between dual controllers on NCR 53c875 (Diamond Fireport 40). Kernel version is 2.4.5-ac9. --- cut here --- 00:00.0 Host bridge: VIA Technologies, Inc. VT82C595/97 [Apollo VP2/97] (rev 04) Flags: bus master, 66Mhz, medium devsel, latency 64 00:07.0 ISA bridge: VIA Technologies, Inc. VT82C586/A/B PCI-to-ISA [Apollo VP] (rev 25) Flags: bus master, medium devsel, latency 0 00:07.1 IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 06) (prog-if 8a [Master SecP PriP]) Flags: bus master, medium devsel, latency 64 I/O ports at 6000 [size=16] --- cut here --- When I attempt to mobprobe the ncr53c8xx module, I get the following output: SCSI subsystem driver Revision: 1.00 PCI: Found IRQ 11 for device 00:0b.0 IRQ routing conflict in pirq table for device 00:0b.0 IRQ routing conflict in pirq table for device 00:0b.1 It appears that something is getting confused and doesn't want to allow the two controllers of this card to share the same IRQ. Here is the relevent output from 'lspci -v': --- cut here --- 00:0b.0 SCSI storage controller: Symbios Logic Inc. (formerly NCR) 53c875 (rev 14) Subsystem: Diamond Multimedia Systems FirePort 40 Dual SCSI Controller Flags: bus master, medium devsel, latency 144, IRQ 10 I/O ports at 6c00 [size=256] Memory at e2001000 (32-bit, non-prefetchable) [size=256] Memory at e2002000 (32-bit, non-prefetchable) [size=4K] Expansion ROM at [disabled] [size=64K] 00:0b.1 SCSI storage controller: Symbios Logic Inc. (formerly NCR) 53c875 (rev 14) Subsystem: Diamond Multimedia Systems FirePort 40 Dual SCSI Controller Flags: bus master, medium devsel, latency 144, IRQ 10 I/O ports at 7000 [size=256] Memory at e2003000 (32-bit, non-prefetchable) [size=256] Memory at e2004000 (32-bit, non-prefetchable) [size=4K] Expansion ROM at [disabled] [size=64K] --- cut here -- There are no other devices using IRQ10. Is this a lost cause? This controller and drives in their current configuration can be moved to an Intel based machine and works flawlessly. I have yet to see this controller work on this VIA motherboard. Any assistance is appreciated. Thanks, Mike.