PCI: add struct pci_host_bridge and a list of all bridges found

This adds a list of all PCI host bridges we find and a way to look up
the host bridge from a pci_dev.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/pci.h b/include/linux/pci.h
index bcaa51ca7858..2c946b3bbf77 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -368,6 +368,11 @@ static inline int pci_channel_offline(struct pci_dev *pdev)
         return (pdev->error_state != pci_channel_io_normal);
 }
 
+struct pci_host_bridge {
+        struct list_head list;
+        struct pci_bus *bus;            /* root bus */
+};
+
 /*
  * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
  * to P2P or CardBus bridge windows) go in a table.  Additional ones (for