PCI: rename pci_host_bridge() to find_pci_root_bridge()

pci_host_bridge() looks like a C++ constructor.  Also separate
find_pci_root_bus() out.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

1 files changed, 13 insertions, 5 deletions

diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index 28b24a5375d4..c49a1c482cfb 100644
--- a/drivers/pci/host-bridge.c
+++ b/drivers/pci/host-bridge.c
@@ -16,15 +16,22 @@ void add_to_pci_host_bridges(struct pci_host_bridge *bridge)
         list_add_tail(&bridge->list, &pci_host_bridges);
 }
 
-static struct pci_host_bridge *pci_host_bridge(struct pci_dev *dev)
+static struct pci_bus *find_pci_root_bus(struct pci_dev *dev)
 {
         struct pci_bus *bus;
-        struct pci_host_bridge *bridge;
 
         bus = dev->bus;
         while (bus->parent)
                 bus = bus->parent;
 
+        return bus;
+}
+
+static struct pci_host_bridge *find_pci_host_bridge(struct pci_dev *dev)
+{
+        struct pci_bus *bus = find_pci_root_bus(dev);
+        struct pci_host_bridge *bridge;
+
         list_for_each_entry(bridge, &pci_host_bridges, list) {
                 if (bridge->bus == bus)
                         return bridge;
@@ -41,7 +48,7 @@ static bool resource_contains(struct resource *res1, struct resource *res2)
 void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
                              struct resource *res)
 {
-        struct pci_host_bridge *bridge = pci_host_bridge(dev);
+        struct pci_host_bridge *bridge = find_pci_host_bridge(dev);
         struct pci_host_bridge_window *window;
         resource_size_t offset = 0;
 
@@ -69,12 +76,13 @@ static bool region_contains(struct pci_bus_region *region1,
 void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
                              struct pci_bus_region *region)
 {
-        struct pci_host_bridge *bridge = pci_host_bridge(dev);
+        struct pci_host_bridge *bridge = find_pci_host_bridge(dev);
         struct pci_host_bridge_window *window;
-        struct pci_bus_region bus_region;
         resource_size_t offset = 0;
 
         list_for_each_entry(window, &bridge->windows, list) {
+                struct pci_bus_region bus_region;
+
                 if (resource_type(res) != resource_type(window->res))
                         continue;