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path: root/drivers/pci/bus.c
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Diffstat (limited to 'drivers/pci/bus.c')
-rw-r--r--drivers/pci/bus.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index dbd33605cc10..fedae89d8f7d 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -121,10 +121,13 @@ void __devinit pci_bus_add_devices(struct pci_bus *bus)
* If there is an unattached subordinate bus, attach
* it and then scan for unattached PCI devices.
*/
- if (dev->subordinate && list_empty(&dev->subordinate->node)) {
- spin_lock(&pci_bus_lock);
- list_add_tail(&dev->subordinate->node, &dev->bus->children);
- spin_unlock(&pci_bus_lock);
+ if (dev->subordinate) {
+ if (list_empty(&dev->subordinate->node)) {
+ spin_lock(&pci_bus_lock);
+ list_add_tail(&dev->subordinate->node,
+ &dev->bus->children);
+ spin_unlock(&pci_bus_lock);
+ }
pci_bus_add_devices(dev->subordinate);
sysfs_create_link(&dev->subordinate->class_dev.kobj, &dev->dev.kobj, "bridge");
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