linux-kernel - Re: regression on quad Xeon: no SCSI-disks

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Fri, 4 May 2007 15:22:37 +0200
From:	Wolfgang Erig <Wolfgang.Erig@....de>
To:	Ivan Kokshaysky <ink@...assic.park.msu.ru>
Cc:	Chuck Ebbert <cebbert@...hat.com>, linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: regression on quad Xeon: no SCSI-disks

On Fri, May 04, 2007 at 03:18:54AM +0400, Ivan Kokshaysky wrote:
> 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);
> -
bingo, this works.
If it makes sense, please send this to Linus.

Thanks a lot,
Wolfgang
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/