diff options
| -rw-r--r-- | drivers/parisc/lba_pci.c | 42 |
1 files changed, 39 insertions, 3 deletions
diff --git a/drivers/parisc/lba_pci.c b/drivers/parisc/lba_pci.c index 0cc6d5cc5d66..a25fed52f7e9 100644 --- a/drivers/parisc/lba_pci.c +++ b/drivers/parisc/lba_pci.c @@ -667,6 +667,42 @@ extend_lmmio_len(unsigned long start, unsigned long end, unsigned long lba_len) #define truncate_pat_collision(r,n) (0) #endif +static void pcibios_allocate_bridge_resources(struct pci_dev *dev) +{ + int idx; + struct resource *r; + + for (idx = PCI_BRIDGE_RESOURCES; idx < PCI_NUM_RESOURCES; idx++) { + r = &dev->resource[idx]; + if (!r->flags) + continue; + if (r->parent) /* Already allocated */ + continue; + if (!r->start || pci_claim_bridge_resource(dev, idx) < 0) { + /* + * Something is wrong with the region. + * Invalidate the resource to prevent + * child resource allocations in this + * range. + */ + r->start = r->end = 0; + r->flags = 0; + } + } +} + +static void pcibios_allocate_bus_resources(struct pci_bus *bus) +{ + struct pci_bus *child; + + /* Depth-First Search on bus tree */ + if (bus->self) + pcibios_allocate_bridge_resources(bus->self); + list_for_each_entry(child, &bus->children, node) + pcibios_allocate_bus_resources(child); +} + + /* ** The algorithm is generic code. ** But it needs to access local data structures to get the IRQ base. @@ -693,11 +729,11 @@ lba_fixup_bus(struct pci_bus *bus) ** pci_alloc_primary_bus() mangles this. */ if (bus->parent) { - int i; /* PCI-PCI Bridge */ pci_read_bridge_bases(bus); - for (i = PCI_BRIDGE_RESOURCES; i < PCI_NUM_RESOURCES; i++) - pci_claim_bridge_resource(bus->self, i); + + /* check and allocate bridge resources */ + pcibios_allocate_bus_resources(bus); } else { /* Host-PCI Bridge */ int err; |