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


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