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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>
This commit is contained in:
Yinghai Lu 2012-04-02 18:31:53 -07:00 committed by Bjorn Helgaas
parent 7b54366358
commit 4fa2649a01
3 changed files with 15 additions and 1 deletions
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8
drivers/pci/host-bridge.c
View File

@ -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;

3
drivers/pci/probe.c
View File

@ -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);

5
include/linux/pci.h
View File

@ -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