[PATCH part3 08/11] PCI: Make pci_rescan_bus_bridge_resize() use pci_scan_bridge
From: Yinghai Lu <yinghai@kernel.org>
Date: 2012-09-02 21:52:47
Also in:
linux-acpi, lkml
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
So after remove all children and then using setpci change bus register and rescan bridge could use new set bus number. Otherwise need to rescan parent bus, it would have too much overhead. also need to use pci_bus_add_single_device to make sure new change bus have directory /sys/../.../pci_bus. Signed-off-by: Yinghai Lu <yinghai@kernel.org> --- drivers/pci/probe.c | 10 ++++++---- 1 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index d1796fe..59345ac 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c@@ -1879,14 +1879,16 @@ EXPORT_SYMBOL(pci_scan_bus); */ unsigned int __ref pci_rescan_bus_bridge_resize(struct pci_dev *bridge) { - unsigned int max; - struct pci_bus *bus = bridge->subordinate; + unsigned int max = 0; + int pass; + struct pci_bus *bus = bridge->bus; - max = pci_scan_child_bus(bus); + for (pass = 0; pass < 2; pass++) + max = pci_scan_bridge(bus, bridge, max, pass); pci_assign_unassigned_bridge_resources(bridge); - pci_bus_add_devices(bus); + pci_bus_add_single_device(bridge); return max; }
--
1.7.7