1 files changed, 12 insertions, 3 deletions

diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index be574fc0d92f..96edb6f8babb 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -64,7 +64,7 @@ static u32 get_int_prop(struct device_node *np, const char *name, u32 def)
         return def;
 }
 
-static unsigned int pci_parse_of_flags(u32 addr0)
+static unsigned int pci_parse_of_flags(u32 addr0, int bridge)
 {
         unsigned int flags = 0;
 
@@ -75,8 +75,17 @@ static unsigned int pci_parse_of_flags(u32 addr0)
                 if (addr0 & 0x40000000)
                         flags |= IORESOURCE_PREFETCH
                                  | PCI_BASE_ADDRESS_MEM_PREFETCH;
+                /* Note: We don't know whether the ROM has been left enabled
+                 * by the firmware or not. We mark it as disabled (ie, we do
+                 * not set the IORESOURCE_ROM_ENABLE flag) for now rather than
+                 * do a config space read, it will be force-enabled if needed
+                 */
+                if (!bridge && (addr0 & 0xff) == 0x30)
+                        flags |= IORESOURCE_READONLY;
         } else if (addr0 & 0x01000000)
                 flags = IORESOURCE_IO | PCI_BASE_ADDRESS_SPACE_IO;
+        if (flags)
+                flags |= IORESOURCE_SIZEALIGN;
         return flags;
 }
 
@@ -95,7 +104,7 @@ static void pci_parse_of_addrs(struct device_node *node, struct pci_dev *dev)
                 return;
         pr_debug("    parse addresses (%d bytes) @ %p\n", proplen, addrs);
         for (; proplen >= 20; proplen -= 20, addrs += 5) {
-                flags = pci_parse_of_flags(addrs[0]);
+                flags = pci_parse_of_flags(addrs[0], 0);
                 if (!flags)
                         continue;
                 base = of_read_number(&addrs[1], 2);
@@ -293,7 +302,7 @@ void __devinit of_scan_pci_bridge(struct device_node *node,
         }
         i = 1;
         for (; len >= 32; len -= 32, ranges += 8) {
-                flags = pci_parse_of_flags(ranges[0]);
+                flags = pci_parse_of_flags(ranges[0], 1);
                 size = of_read_number(&ranges[6], 2);
                 if (flags == 0 || size == 0)
                         continue;