PCI: add host bridge release support

We need a hook to release host bridge resources allocated when creating
root bus.

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

diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index 122df80..a68dc61 100644 (file)
--- a/drivers/pci/host-bridge.c
+++ b/drivers/pci/host-bridge.c
@@ -27,6 +27,14 @@ static struct pci_host_bridge *find_pci_host_bridge(struct pci_dev *dev)
        return to_pci_host_bridge(bus->bridge);
 }
 
+void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
+                                void (*release_fn)(struct pci_host_bridge *),
+                                void *release_data)
+{
+       bridge->release_fn = release_fn;
+       bridge->release_data = release_data;
+}
+
 static bool resource_contains(struct resource *res1, struct resource *res2)
 {
        return res1->start <= res2->start && res1->end >= res2->end;

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 8d291ee..4c2f226 100644 (file)
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1137,7 +1137,8 @@ static void pci_release_bus_bridge_dev(struct device *dev)
 {
        struct pci_host_bridge *bridge = to_pci_host_bridge(dev);
 
-       /* TODO: need to free window->res */
+       if (bridge->release_fn)
+               bridge->release_fn(bridge);
 
        pci_free_resource_list(&bridge->windows);
 

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 8f4f29d..17b7b5b 100644 (file)
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -378,9 +378,14 @@ struct pci_host_bridge {
        struct device dev;
        struct pci_bus *bus;            /* root bus */
        struct list_head windows;       /* pci_host_bridge_windows */
+       void (*release_fn)(struct pci_host_bridge *);
+       void *release_data;
 };
 
 #define        to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
+void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
+                    void (*release_fn)(struct pci_host_bridge *),
+                    void *release_data);
 
 /*
  * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond