pci: track parent<->child relationship

So that PCI devices hang down from bridges and root
bridges down from the PCI host controller when
calling devinfo.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 932acf0d7c..3d0e73bf9f 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -122,6 +122,7 @@ enum {
 };
 struct pci_bus {
 	struct pci_controller *host;	/* associated host controller */
+	struct device_d *parent;
 	struct list_head node;		/* node in list of buses */
 	struct list_head children;	/* list of child buses */
 	struct list_head devices;	/* list of devices on this bus */
@@ -158,6 +159,7 @@ extern struct pci_ops *pci_ops;
  */
 struct pci_controller {
 	struct pci_controller *next;
+	struct device_d *parent;
 	struct pci_bus *bus;
 
 	struct pci_ops *pci_ops;