Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1767474AbXECXST (ORCPT ); Thu, 3 May 2007 19:18:19 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1767468AbXECXST (ORCPT ); Thu, 3 May 2007 19:18:19 -0400 Received: from jurassic.park.msu.ru ([195.208.223.243]:2073 "EHLO jurassic.park.msu.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1767466AbXECXSS (ORCPT ); Thu, 3 May 2007 19:18:18 -0400 Date: Fri, 4 May 2007 03:18:54 +0400 From: Ivan Kokshaysky To: Chuck Ebbert , linux-kernel@vger.kernel.org, Greg Kroah-Hartman , Andrew Morton Subject: Re: regression on quad Xeon: no SCSI-disks Message-ID: <20070504031854.B28085@jurassic.park.msu.ru> References: <20070501142431.GA11667@erig.dyndns.org> <46376474.8090505@redhat.com> <20070502144716.GA11061@erig.dyndns.org> <20070502211215.A19444@jurassic.park.msu.ru> <20070503084141.GA22742@erig.dyndns.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20070503084141.GA22742@erig.dyndns.org>; from Wolfgang.Erig@gmx.de on Thu, May 03, 2007 at 10:41:41AM +0200 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1815 Lines: 44 On Thu, May 03, 2007 at 10:41:41AM +0200, Wolfgang Erig wrote: > I am prepared to do tweaks to your small patch, but I need your help. > My own blindly experiments failed miserably. I don't think that patch did anything wrong, most likely it just triggered a bug elsewhere. These two lines from your dmesg look very suspicious: > PCI: Cannot allocate resource region 0 of device 0000:00:04.0 > PCI: Error while updating region 0000:00:04.0/0 (a8008000 != fec08000) Note that the BAR seems to have high address bits hardwired to fec00000. And device 0000:00:04.0 is > 00:04.0 System peripheral: Siemens Nixdorf AG FSC Multiprocessor Interrupt Controller (rev 02) I'd guess that when we try to reassign this resource, PCI interrupts might just stop working. This could explain SCSI timeouts and other weird things. Maybe this patch helps? Ivan. --- 2.6.21/arch/i386/pci/fixup.c 2007-02-04 21:44:54.000000000 +0300 +++ linux/arch/i386/pci/fixup.c 2007-05-04 01:58:32.629654275 +0400 @@ -436,3 +436,14 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_CY pci_early_fixup_cyrix_5530); DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, pci_early_fixup_cyrix_5530); + +/* + * Siemens Nixdorf AG FSC Multiprocessor Interrupt Controller: + * prevent update of the BAR0, which doesn't look like a normal BAR. + */ +static void __devinit pci_siemens_interrupt_controller(struct pci_dev *dev) +{ + dev->resource[0].flags |= IORESOURCE_PCI_FIXED; +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_SIEMENS, 0x0015, + pci_siemens_interrupt_controller); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/