PCI: Restore detection of read-only BARs

[pandora-kernel.git] / drivers / pci / probe.c

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 04e74f4..bc92c47 100644 (file)
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -175,14 +175,17 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
                res->flags |= IORESOURCE_SIZEALIGN;
                if (res->flags & IORESOURCE_IO) {
                        l &= PCI_BASE_ADDRESS_IO_MASK;
+                       sz &= PCI_BASE_ADDRESS_IO_MASK;
                        mask = PCI_BASE_ADDRESS_IO_MASK & (u32) IO_SPACE_LIMIT;
                } else {
                        l &= PCI_BASE_ADDRESS_MEM_MASK;
+                       sz &= PCI_BASE_ADDRESS_MEM_MASK;
                        mask = (u32)PCI_BASE_ADDRESS_MEM_MASK;
                }
        } else {
                res->flags |= (l & IORESOURCE_ROM_ENABLE);
                l &= PCI_ROM_ADDRESS_MASK;
+               sz &= PCI_ROM_ADDRESS_MASK;
                mask = (u32)PCI_ROM_ADDRESS_MASK;
        }
 
@@ -651,10 +654,17 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
        dev_dbg(&dev->dev, "scanning [bus %02x-%02x] behind bridge, pass %d\n",
                secondary, subordinate, pass);
 
+       if (!primary && (primary != bus->number) && secondary && subordinate) {
+               dev_warn(&dev->dev, "Primary bus is hard wired to 0\n");
+               primary = bus->number;
+       }
+
        /* Check if setup is sensible at all */
        if (!pass &&
-           (primary != bus->number || secondary <= bus->number)) {
-               dev_dbg(&dev->dev, "bus configuration invalid, reconfiguring\n");
+           (primary != bus->number || secondary <= bus->number ||
+            secondary > subordinate)) {
+               dev_info(&dev->dev, "bridge configuration invalid ([bus %02x-%02x]), reconfiguring\n",
+                        secondary, subordinate);
                broken = 1;
        }