From mboxrd@z Thu Jan 1 00:00:00 1970 From: m-karicheri2@ti.com (Murali Karicheri) Date: Thu, 5 Feb 2015 16:52:56 -0500 Subject: [PATCH v6 4/7] PCI: add helper functions pci_get[put]_host_bridge_device() In-Reply-To: <1423173179-10227-1-git-send-email-m-karicheri2@ti.com> References: <1423173179-10227-1-git-send-email-m-karicheri2@ti.com> Message-ID: <1423173179-10227-5-git-send-email-m-karicheri2@ti.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Add a helper function to get/put the root bus's host bridge device. Cc: Joerg Roedel Cc: Grant Likely Cc: Rob Herring Cc: Will Deacon Cc: Russell King Cc: Arnd Bergmann Cc: Suravee Suthikulpanit Acked-by: Bjorn Helgaas Signed-off-by: Murali Karicheri --- 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