Separate find_pci_root_bus out.
-v2: according to Bjorn, remove extra null checking.
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
---
drivers/pci/host-bridge.c | 18 +++++++++++++-----
1 files changed, 13 insertions(+), 5 deletions(-)
diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index 5ca4220..78adcc0 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;
--
1.7.7
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