Messages in this thread Patch in this message | | | From | Jiang Liu <> | Subject | [PATCH v2, part 1 1/9] PCI: introduce pci_bus_{get|put}() to manage PCI bus reference count | Date | Tue, 14 May 2013 00:08:25 +0800 |
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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> Cc: linux-pci@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- drivers/pci/bus.c | 15 +++++++++++++++ include/linux/pci.h | 2 ++ 2 files changed, 17 insertions(+)
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index 748f8f3..f7e1f76 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -282,6 +282,21 @@ 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 e19d864..f5e13f0 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1017,6 +1017,8 @@ 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); -- 1.8.1.2
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