Messages in this thread Patch in this message | | | From | Murali Karicheri <> | Subject | [PATCH v6 4/7] PCI: add helper functions pci_get[put]_host_bridge_device() | Date | Thu, 5 Feb 2015 16:52:56 -0500 |
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Add a helper function to get/put the root bus's host bridge device.
Cc: Joerg Roedel <joro@8bytes.org> Cc: Grant Likely <grant.likely@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Will Deacon <will.deacon@arm.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> --- drivers/pci/host-bridge.c | 14 ++++++++++++++ include/linux/pci.h | 3 +++ 2 files changed, 17 insertions(+)
diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c index 0e5f3c9..f58e05b 100644 --- a/drivers/pci/host-bridge.c +++ b/drivers/pci/host-bridge.c @@ -23,6 +23,20 @@ static struct pci_host_bridge *find_pci_host_bridge(struct pci_bus *bus) return to_pci_host_bridge(root_bus->bridge); } +struct device *pci_get_host_bridge_device(struct pci_dev *dev) +{ + struct pci_bus *root_bus = find_pci_root_bus(dev->bus); + struct device *bridge = root_bus->bridge; + + kobject_get(&bridge->kobj); + return bridge; +} + +void pci_put_host_bridge_device(struct device *dev) +{ + kobject_put(&dev->kobj); +} + void pci_set_host_bridge_release(struct pci_host_bridge *bridge, void (*release_fn)(struct pci_host_bridge *), void *release_data) diff --git a/include/linux/pci.h b/include/linux/pci.h index 9603094..d677c66 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -513,6 +513,9 @@ static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev) return dev->bus->self; } +struct device *pci_get_host_bridge_device(struct pci_dev *dev); +void pci_put_host_bridge_device(struct device *dev); + #ifdef CONFIG_PCI_MSI static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { -- 1.7.9.5
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