PCI: Add pci_stop_and_remove_root_bus()

[firefly-linux-kernel-4.4.55.git] / drivers / pci / remove.c

diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index 513972f3ed13631f152b4d9b3bef9d8f489db857..7c0fd9252e6f03c1b1f17f53282be0c5a1fdb57d 100644 (file)
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -111,3 +111,39 @@ void pci_stop_and_remove_bus_device(struct pci_dev *dev)
        pci_remove_bus_device(dev);
 }
 EXPORT_SYMBOL(pci_stop_and_remove_bus_device);
+
+void pci_stop_root_bus(struct pci_bus *bus)
+{
+       struct pci_dev *child, *tmp;
+       struct pci_host_bridge *host_bridge;
+
+       if (!pci_is_root_bus(bus))
+               return;
+
+       host_bridge = to_pci_host_bridge(bus->bridge);
+       list_for_each_entry_safe_reverse(child, tmp,
+                                        &bus->devices, bus_list)
+               pci_stop_bus_device(child);
+
+       /* stop the host bridge */
+       device_del(&host_bridge->dev);
+}
+
+void pci_remove_root_bus(struct pci_bus *bus)
+{
+       struct pci_dev *child, *tmp;
+       struct pci_host_bridge *host_bridge;
+
+       if (!pci_is_root_bus(bus))
+               return;
+
+       host_bridge = to_pci_host_bridge(bus->bridge);
+       list_for_each_entry_safe(child, tmp,
+                                &bus->devices, bus_list)
+               pci_remove_bus_device(child);
+       pci_remove_bus(bus);
+       host_bridge->bus = NULL;
+
+       /* remove the host bridge */
+       put_device(&host_bridge->dev);
+}