commit 4fa2649a01a4357a82dcc60ef8fb7b8c441e64ed
author Yinghai Lu <yinghai@kernel.org> Mon Apr 02 18:31:53 2012 -0700
committer Bjorn Helgaas <bhelgaas@google.com> Mon Apr 30 14:52:43 2012 -0600
tree dfe8dd728396fd3034f20de91bb610422a9bc4e6
parent 7b54366358008241f88228f02cc80ab352265eac

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>

drivers/pci/host-bridge.c

diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index 122df80..a68dc61 100644
--- a/drivers/pci/host-bridge.c
+++ b/drivers/pci/host-bridge.c
@@ -27,6 +27,14 @@
 	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;

drivers/pci/probe.c

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 8d291ee..4c2f226 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1137,7 +1137,8 @@
 {
 	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);
 

include/linux/pci.h

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 8f4f29d..17b7b5b 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -378,9 +378,14 @@
 	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