Introduce pci_bus_get()/pci_bus_put() to hide implementation details
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx>
---
drivers/acpi/pci_slot.c | 4 ++--
drivers/pci/bus.c | 15 +++++++++++++++
drivers/pci/hotplug/acpiphp_glue.c | 4 ++--
include/linux/pci.h | 2 ++
4 files changed, 21 insertions(+), 4 deletions(-)
diff --git a/drivers/acpi/pci_slot.c b/drivers/acpi/pci_slot.c
index e50e31a..323797a 100644
--- a/drivers/acpi/pci_slot.c
+++ b/drivers/acpi/pci_slot.c
@@ -166,7 +166,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv)
list_add(&slot->list, &slot_list);
mutex_unlock(&slot_list_lock);
- get_device(&pci_bus->dev);
+ pci_bus_get(pci_bus);
dbg("pci_slot: %p, pci_bus: %x, device: %d, name: %s\n",
pci_slot, pci_bus->number, device, name);
@@ -322,7 +322,7 @@ acpi_pci_slot_remove(acpi_handle handle)
list_del(&slot->list);
pbus = slot->pci_slot->bus;
pci_destroy_slot(slot->pci_slot);
- put_device(&pbus->dev);
+ pci_bus_put(pbus);
kfree(slot);
}
}
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 672ffc8..2803120 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -35,6 +35,21 @@ void pci_add_resource_offset(struct list_head *resources, struct resource *res,
}
EXPORT_SYMBOL(pci_add_resource_offset);
+struct pci_bus *pci_bus_get(struct pci_bus *bus)
+{
+ if (bus)
+ get_device(&bus->dev);
+ return bus;
+}
+EXPORT_SYMBOL(pci_bus_get);
+
+void pci_bus_put(struct pci_bus *bus)
+{
+ if (bus)
+ put_device(&bus->dev);
+}
+EXPORT_SYMBOL(pci_bus_put);
+
void pci_add_resource(struct list_head *resources, struct resource *res)
{
pci_add_resource_offset(resources, res, 0);
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 9d781a7..11155ef 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -397,7 +397,7 @@ static void add_p2p_bridge(acpi_handle *handle)
* removed via PCI core logical hotplug. The ref pins the bus
* (which we access during module unload).
*/
- get_device(&bridge->pci_bus->dev);
+ pci_bus_get(bridge->pci_bus);
init_bridge_misc(bridge);
return;
@@ -527,7 +527,7 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
* Only P2P bridges have a pci_dev
*/
if (bridge->pci_dev)
- put_device(&bridge->pci_bus->dev);
+ pci_bus_put(bridge->pci_bus);
pci_dev_put(bridge->pci_dev);
list_del(&bridge->list);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 161f6c0..427ea42 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -933,6 +933,8 @@ int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
void pci_release_selected_regions(struct pci_dev *, int);
/* drivers/pci/bus.c */
+struct pci_bus *pci_bus_get(struct pci_bus *bus);
+void pci_bus_put(struct pci_bus *bus);
void pci_add_resource(struct list_head *resources, struct resource *res);
void pci_add_resource_offset(struct list_head *resources, struct resource *res,
resource_size_t offset);
--
1.7.5.4
--
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