diff options
| author | Murali Karicheri <m-karicheri2@ti.com> | 2015-03-03 12:52:11 -0500 |
|---|---|---|
| committer | Alex Shi <alex.shi@linaro.org> | 2015-10-26 14:07:37 +0800 |
| commit | 79be3c4d79d734750b13299d784c4ceb53a1e22b (patch) | |
| tree | a4ccf561be430d09c79c53b5b4da93d8b105de71 | |
| parent | a9e3eefb46c3763adcbff014d63512c79373ba22 (diff) | |
PCI: Add helper functions pci_get[put]_host_bridge_device()
Add helper functions to get/put the root bus's host bridge device.
Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> (AMD Seattle)
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
CC: Joerg Roedel <joro@8bytes.org>
CC: Grant Likely <grant.likely@linaro.org>
CC: Rob Herring <robh+dt@kernel.org>
CC: Russell King <linux@arm.linux.org.uk>
CC: Arnd Bergmann <arnd@arndb.de>
(cherry picked from commit 6675a601d72be408025e675599702e30a99188aa)
Signed-off-by: Alex Shi <alex.shi@linaro.org>
| -rw-r--r-- | drivers/pci/host-bridge.c | 14 | ||||
| -rw-r--r-- | include/linux/pci.h | 3 |
2 files changed, 17 insertions, 0 deletions
diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c index 0e5f3c95af5b..f58e05b0f8d5 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 e92cdad3240d..2a6b1c6a849d 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -512,6 +512,9 @@ 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) { |