1 files changed, 15 insertions, 3 deletions

diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 97a8194063b5..cef28a79103f 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -41,9 +41,14 @@ pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
                 void *alignf_data)
 {
         int i, ret = -ENOMEM;
+        resource_size_t max = -1;
 
         type_mask |= IORESOURCE_IO | IORESOURCE_MEM;
 
+        /* don't allocate too high if the pref mem doesn't support 64bit*/
+        if (!(res->flags & IORESOURCE_MEM_64))
+                max = PCIBIOS_MAX_MEM_32;
+
         for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
                 struct resource *r = bus->resource[i];
                 if (!r)
@@ -62,7 +67,7 @@ pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
                 /* Ok, try it out.. */
                 ret = allocate_resource(r, res, size,
                                         r->start ? : min,
-                                        -1, align,
+                                        max, align,
                                         alignf, alignf_data);
                 if (ret == 0)
                         break;
@@ -201,13 +206,18 @@ void pci_enable_bridges(struct pci_bus *bus)
  *  Walk the given bus, including any bridged devices
  *  on buses under this bus.  Call the provided callback
  *  on each device found.
+ *
+ *  We check the return of @cb each time. If it returns anything
+ *  other than 0, we break out.
+ *
  */
-void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
+void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
                   void *userdata)
 {
         struct pci_dev *dev;
         struct pci_bus *bus;
         struct list_head *next;
+        int retval;
 
         bus = top;
         down_read(&pci_bus_sem);
@@ -231,8 +241,10 @@ void pci_walk_bus(struct pci_bus *top, void (*cb)(struct pci_dev *, void *),
 
                 /* Run device routines with the device locked */
                 down(&dev->dev.sem);
-                cb(dev, userdata);
+                retval = cb(dev, userdata);
                 up(&dev->dev.sem);
+                if (retval)
+                        break;
         }
         up_read(&pci_bus_sem);
 }