Commit 
0b0b0893d49b "of/pci: Fix the conversion of IO ranges into IO
resources" changed the behaviour of of_pci_range_to_resource().
The issue is described here:
"powerpc/pci: Fix IO space breakage after of_pci_range_to_resource()
change"
(sha1: 
aeba3731b150188685225b510886f1370d8814de)
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
 
                        res = &hose->mem_resources[memno++];
                        break;
                }
-               if (res != NULL)
-                       of_pci_range_to_resource(&range, dev, res);
+               if (res != NULL) {
+                       res->name = dev->full_name;
+                       res->flags = range.flags;
+                       res->start = range.cpu_addr;
+                       res->end = range.cpu_addr + range.size - 1;
+                       res->parent = res->child = res->sibling = NULL;
+               }
        }
 
        /* If there's an ISA hole and the pci_mem_offset is -not- matching