[PATCH -v3 05/11] PCI: Add host bridge release support

[Yinghai Lu <yinghai@kernel.org>]

We need one hook to release host bridge resource that are allocated for host
bridge during creating root bus.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
 drivers/pci/host-bridge.c |    8 ++++++++
 drivers/pci/probe.c       |    3 ++-
 include/linux/pci.h       |    5 +++++
 3 files changed, 15 insertions(+), 1 deletions(-)

diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index a55c3f8..3b2cb40 100644
--- 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 903ebe5..d30948d 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1136,7 +1136,8 @@ 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 310610e..d93d3ae 100644
--- 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
-- 
1.7.7