diff options
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 21f162c5c7bb..9a641cc4275d 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -782,7 +782,7 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass) /* Check if setup is sensible at all */ if (!pass && (primary != bus->number || secondary <= bus->number || - secondary > subordinate)) { + secondary > subordinate || subordinate > bus->busn_res.end)) { dev_info(&dev->dev, "bridge configuration invalid ([bus %02x-%02x]), reconfiguring\n", secondary, subordinate); broken = 1; @@ -854,7 +854,8 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass) child = pci_add_new_bus(bus, dev, max+1); if (!child) goto out; - pci_bus_insert_busn_res(child, max+1, 0xff); + pci_bus_insert_busn_res(child, max+1, + bus->busn_res.end); } max++; buses = (buses & 0xff000000) @@ -927,6 +928,11 @@ int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, int pass) /* * Set the subordinate bus number to its real value. */ + if (max > bus->busn_res.end) { + dev_warn(&dev->dev, "max busn %02x is outside %pR\n", + max, &bus->busn_res); + max = bus->busn_res.end; + } pci_bus_update_busn_res_end(child, max); pci_write_config_byte(dev, PCI_SUBORDINATE_BUS, max); } |