[IA64-SGI]: disable non-display ROM resources

 
This patch is needed to correctly support the new sysfs rom file.  On sn2, we
only allocate PIO space for display option ROMs since PIO space is a
relatively scarce resource (we've seen exhaustion when running with several
qla cards in the same domain).  And without this patch we won't zero out
non-display ROM resources which can lead to panics if anyone tries to use the
bogus addresses left over there from the generic PCI probing code.
Signed-off-by: Jesse Barnes <jbarnes@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/sn/io/machvec/pci_bus_cvlink.c

@@ -357,6 +357,19 @@ sn_pci_fixup_slot(struct pci_dev *dev)
                         if (dev->resource[PCI_ROM_RESOURCE].flags & IORESOURCE_MEM)
                                 cmd |= PCI_COMMAND_MEMORY;
                 }
+        } else {
+		/*
+		 * Remove other ROM resources since they don't have valid
+		 * CPU addresses.
+		 */
+                size = dev->resource[PCI_ROM_RESOURCE].end -
+                        dev->resource[PCI_ROM_RESOURCE].start;
+
+		if (size) {
+			dev->resource[PCI_ROM_RESOURCE].start = 0;
+			dev->resource[PCI_ROM_RESOURCE].end = 0;
+			dev->resource[PCI_ROM_RESOURCE].flags = 0;
+		}
 	}
 
 	/*