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PCI: do not enable bridges more than once

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In preparation for PCI core hotplug, we need to ensure that we do
not attempt to re-enable bridges that have already been enabled.

Reported-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Alex Chiang 2009-03-20 14:56:20 -06:00 committed by Jesse Barnes
parent b73e97d95c
commit 9dd90cafa7
1 changed files with 4 additions and 2 deletions
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6
drivers/pci/bus.c
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@ -184,8 +184,10 @@ void pci_enable_bridges(struct pci_bus *bus)
list_for_each_entry(dev, &bus->devices, bus_list) {
if (dev->subordinate) {
retval = pci_enable_device(dev);
pci_set_master(dev);
if (atomic_read(&dev->enable_cnt) == 0) {
retval = pci_enable_device(dev);
pci_set_master(dev);
}
pci_enable_bridges(dev->subordinate);
}
}