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authorAlex Chiang <achiang@hp.com>2009-03-20 14:56:20 -0600
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-03-20 14:57:36 -0700
commit9dd90cafa7a712d283e2e0c625b022e19f746762 (patch)
tree78e3dffc9174a62fac539c7c0cbae36e15b83740 /drivers/pci/bus.c
parentb73e97d95c168cbc19bd1208c894077f25931ba1 (diff)
PCI: do not enable bridges more than once
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>
Diffstat (limited to 'drivers/pci/bus.c')
-rw-r--r--drivers/pci/bus.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 118c77778d2..68f91a25259 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -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);
}
}