diff options
Diffstat (limited to 'drivers/pci_auto.c')
| -rw-r--r-- | drivers/pci_auto.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/pci_auto.c b/drivers/pci_auto.c index 20acc0713ef..39b7e8e33b2 100644 --- a/drivers/pci_auto.c +++ b/drivers/pci_auto.c @@ -163,7 +163,8 @@ static void pciauto_prescan_setup_bridge(struct pci_controller *hose, /* Configure bus number registers */ pci_hose_write_config_byte(hose, dev, PCI_PRIMARY_BUS, PCI_BUS(dev)); - pci_hose_write_config_byte(hose, dev, PCI_SECONDARY_BUS, sub_bus + 1); + /* TBS: passed in sub_bus is correct, removed the +1 */ + pci_hose_write_config_byte(hose, dev, PCI_SECONDARY_BUS, sub_bus); pci_hose_write_config_byte(hose, dev, PCI_SUBORDINATE_BUS, 0xff); if (pci_mem) @@ -284,6 +285,7 @@ int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev) unsigned int sub_bus = PCI_BUS(dev); unsigned short class; unsigned char prg_iface; + int n; pci_hose_read_config_word(hose, dev, PCI_CLASS_DEVICE, &class); @@ -294,11 +296,19 @@ int pciauto_config_device(struct pci_controller *hose, pci_dev_t dev) pciauto_setup_device(hose, dev, 2, hose->pci_mem, hose->pci_io); DEBUGF("PCI Autoconfig: Found P2P bridge, device %d\n", PCI_DEV(dev)); - pciauto_prescan_setup_bridge(hose, dev, sub_bus); - - pci_hose_scan_bus(hose, hose->current_busno); - + + /* TBS: Passing in current_busno allows for sibling P2P bridges */ + pciauto_prescan_setup_bridge(hose, dev, hose->current_busno); + /* + * TBS: need to figure out if this is a subordinate bridge on the bus + * to be able to properly set the pri/sec/sub bridge registers. + */ + n = pci_hose_scan_bus(hose, hose->current_busno); + + /* TBS: figure out the deepest we've gone for this leg */ + sub_bus = max(n, sub_bus); pciauto_postscan_setup_bridge(hose, dev, sub_bus); + sub_bus = hose->current_busno; break; |