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| author |   Jiang Liu <liuj97@gmail.com> | 2013-05-25 21:48:29 +0800 |
|---|---|---|
| committer |   Bjorn Helgaas <bhelgaas@google.com> | 2013-05-27 16:22:09 -0600 |
| commit | fe830ef62ac6d8814e27b7e2f632848694b0e5c7 (patch) | |
| tree | 7a75eef662b6186781efb11566f3a7aa01a7cc60 | |
| parent | Linux 3.10-rc1 (diff) | |
| download | linux-dev-fe830ef62ac6d8814e27b7e2f632848694b0e5c7.tar.xz linux-dev-fe830ef62ac6d8814e27b7e2f632848694b0e5c7.zip | |
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>
| -rw-r--r-- | drivers/pci/bus.c | 15 | ||||
| -rw-r--r-- | include/linux/pci.h | 2 |
2 files changed, 17 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); diff --git a/include/linux/pci.h b/include/linux/pci.h index 3a24e4ff3248..7556c590ddfd 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1018,6 +1018,8 @@ 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); |