1 files changed, 30 insertions, 8 deletions

diff --git a/arch/ppc64/kernel/pci.c b/arch/ppc64/kernel/pci.c
index feec06bbafc3..b2fb6746f00b 100644
--- a/arch/ppc64/kernel/pci.c
+++ b/arch/ppc64/kernel/pci.c
@@ -880,9 +880,9 @@ static void __devinit pci_process_ISA_OF_ranges(struct device_node *isa_node,
 }
 
 void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose,
-                                            struct device_node *dev)
+                                            struct device_node *dev, int prim)
 {
-        unsigned int *ranges;
+        unsigned int *ranges, pci_space;
         unsigned long size;
         int rlen = 0;
         int memno = 0;
@@ -905,16 +905,39 @@ void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose,
         ranges = (unsigned int *) get_property(dev, "ranges", &rlen);
         while ((rlen -= np * sizeof(unsigned int)) >= 0) {
                 res = NULL;
-                pci_addr = (unsigned long)ranges[1] << 32 | ranges[2];
+                pci_space = ranges[0];
+                pci_addr = ((unsigned long)ranges[1] << 32) | ranges[2];
 
                 cpu_phys_addr = ranges[3];
-                if (na == 2)
-                        cpu_phys_addr = cpu_phys_addr << 32 | ranges[4];
+                if (na >= 2)
+                        cpu_phys_addr = (cpu_phys_addr << 32) | ranges[4];
 
-                size = (unsigned long)ranges[na+3] << 32 | ranges[na+4];
+                size = ((unsigned long)ranges[na+3] << 32) | ranges[na+4];
+                ranges += np;
                 if (size == 0)
                         continue;
-                switch ((ranges[0] >> 24) & 0x3) {
+
+                /* Now consume following elements while they are contiguous */
+                while (rlen >= np * sizeof(unsigned int)) {
+                        unsigned long addr, phys;
+
+                        if (ranges[0] != pci_space)
+                                break;
+                        addr = ((unsigned long)ranges[1] << 32) | ranges[2];
+                        phys = ranges[3];
+                        if (na >= 2)
+                                phys = (phys << 32) | ranges[4];
+                        if (addr != pci_addr + size ||
+                            phys != cpu_phys_addr + size)
+                                break;
+
+                        size += ((unsigned long)ranges[na+3] << 32)
+                                | ranges[na+4];
+                        ranges += np;
+                        rlen -= np * sizeof(unsigned int);
+                }
+
+                switch ((pci_space >> 24) & 0x3) {
                 case 1:         /* I/O space */
                         hose->io_base_phys = cpu_phys_addr;
                         hose->pci_io_size = size;
@@ -948,7 +971,6 @@ void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose,
                         res->sibling = NULL;
                         res->child = NULL;
                 }
-                ranges += np;
         }
 }