PCI: check if a bus is added when removing it

When removing a bus, 'is_added' should be checked to make sure the
bus has been successfully added by pci_bus_add_child() who will sets
'is_added'.

Signed-off-by: Yu Zhao <yu.zhao@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index 042e08924421..caf8e1eae45e 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -71,6 +71,9 @@ void pci_remove_bus(struct pci_bus *pci_bus)
         down_write(&pci_bus_sem);
         list_del(&pci_bus->node);
         up_write(&pci_bus_sem);
+        if (!pci_bus->is_added)
+                return;
+
         pci_remove_legacy_files(pci_bus);
         device_remove_file(&pci_bus->dev, &dev_attr_cpuaffinity);
         device_remove_file(&pci_bus->dev, &dev_attr_cpulistaffinity);