Commit 73a74ed3 authored May 23, 2007 by Ivan Kokshaysky Committed by Greg Kroah-Hartman May 31, 2007

PCI: i386: fixup for Siemens Nixdorf AG FSC Multiprocessor Interrupt Controllers



Wolfgang gets:

 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.

Cc: Wolfgang Erig <Wolfgang.Erig@gmx.de>
Cc: Chuck Ebbert <cebbert@redhat.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

parent 3c92c57a

arch/i386/pci/fixup.c

+11 −0

Original line number	Diff line number	Diff line
		@@ -436,3 +436,14 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY,
		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);

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