[PATCH v5 4/8] PCI: add helper functions pci_get[put]_host_bridge_device()
From: Murali Karicheri <hidden>
Date: 2015-01-27 21:01:15
Also in:
linux-arm-kernel, linux-iommu, linux-pci, lkml
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
Add a helper function to get/put the root bus's host bridge device. Cc: Joerg Roedel <redacted> Cc: Grant Likely <redacted> Cc: Rob Herring <redacted> Cc: Will Deacon <redacted> Cc: Russell King <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org> Cc: Arnd Bergmann <redacted> Cc: Suravee Suthikulpanit <redacted> Acked-by: Bjorn Helgaas <redacted> Signed-off-by: Murali Karicheri <redacted> --- 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) {
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1.7.9.5