Otherwise may have problem later if we plug pcie cards with bridges. Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx> --- drivers/pci/probe.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 118fe5b..f66f1b1 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -811,6 +811,7 @@ static int __devinit pci_bridge_check_busn_broken(struct pci_bus *bus, static unsigned int __devinit __pci_scan_child_bus(struct pci_bus *bus, int pass); +#define HOTPLUG_BRIDGE_RESERVE_BUSNR 8 /* * If it's a bridge, configure it and scan the bus behind it. * For CardBus bridges, we don't scan behind as the devices will @@ -1019,6 +1020,11 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max, /* * Set the subordinate bus number to its real value. */ + if (dev->is_hotplug_bridge && child->busn_res.end > max && + (max - child->busn_res.start) < HOTPLUG_BRIDGE_RESERVE_BUSNR) + max = min_t(int, child->busn_res.start + + HOTPLUG_BRIDGE_RESERVE_BUSNR, + child->busn_res.end); shrink_size = (int)child->busn_res.end - max; pci_write_config_byte(dev, PCI_SUBORDINATE_BUS, max); pci_bus_update_busn_res_end(child, max); -- 1.7.7 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
