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authorJiang Liu <liuj97@gmail.com>2013-05-25 17:48:29 +0400
committerBjorn Helgaas <bhelgaas@google.com>2013-05-28 02:22:09 +0400
commitfe830ef62ac6d8814e27b7e2f632848694b0e5c7 (patch)
tree7a75eef662b6186781efb11566f3a7aa01a7cc60 /drivers/pci/bus.c
parentf722406faae2d073cc1d01063d1123c35425939e (diff)
downloadlinux-fe830ef62ac6d8814e27b7e2f632848694b0e5c7.tar.xz
PCI: Introduce pci_bus_{get|put}() to manage PCI bus reference count
Introduce helper functions pci_bus_{get|put}() to manage PCI bus reference count. Signed-off-by: Jiang Liu <jiang.liu@huawei.com> Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/bus.c')
-rw-r--r--drivers/pci/bus.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 32e66a6f12d9..b1ff02ab4f13 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -283,6 +283,21 @@ void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
}
EXPORT_SYMBOL_GPL(pci_walk_bus);
+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);
+
EXPORT_SYMBOL(pci_bus_alloc_resource);
EXPORT_SYMBOL_GPL(pci_bus_add_device);
EXPORT_SYMBOL(pci_bus_add_devices);