diff options
| -rw-r--r-- | src/device/pci_device.c | 29 |
1 files changed, 9 insertions, 20 deletions
diff --git a/src/device/pci_device.c b/src/device/pci_device.c index 7ac560b462..fe03d61e26 100644 --- a/src/device/pci_device.c +++ b/src/device/pci_device.c @@ -1174,11 +1174,16 @@ static void pci_bridge_route(struct bus *link, scan_state state) struct bus *parent = dev->bus; u32 reg, buses = 0; + if (state == PCI_ROUTE_SCAN) { + link->secondary = parent->subordinate + 1; + link->subordinate = link->secondary; + } + if (state == PCI_ROUTE_CLOSE) { buses |= 0xfeff << 8; } else if (state == PCI_ROUTE_SCAN) { buses |= ((u32) link->secondary & 0xff) << 8; - buses |= ((u32) link->subordinate & 0xff) << 16; + buses |= 0xff << 16; /* MAX PCI_BUS number here */ } else if (state == PCI_ROUTE_FINAL) { buses |= parent->secondary & 0xff; buses |= ((u32) link->secondary & 0xff) << 8; @@ -1205,10 +1210,10 @@ static void pci_bridge_route(struct bus *link, scan_state state) if (state == PCI_ROUTE_FINAL) { pci_write_config16(dev, PCI_COMMAND, link->bridge_cmd); + parent->subordinate = link->subordinate; } } - /** * Scan a PCI bridge and the buses behind the bridge. * @@ -1244,29 +1249,13 @@ unsigned int do_pci_scan_bridge(struct device *dev, unsigned int max, bus = dev->link_list; - /* - * Set up the primary, secondary and subordinate bus numbers. We have - * no idea how many buses are behind this bridge yet, so we set the - * subordinate bus number to 0xff for the moment. - */ - bus->secondary = ++max; - bus->subordinate = 0xff; - pci_bridge_route(bus, PCI_ROUTE_SCAN); - /* Now we can scan all subordinate buses (those behind the bridge). */ - max = do_scan_bus(bus, 0x00, 0xff, max); - - /* - * We know the number of buses behind this bridge. Set the subordinate - * bus number to its real value. - */ - bus->subordinate = max; + bus->subordinate = do_scan_bus(bus, 0x00, 0xff, bus->secondary); pci_bridge_route(bus, PCI_ROUTE_FINAL); - printk(BIOS_SPEW, "%s returns max %d\n", __func__, max); - return max; + return bus->subordinate; } /** |