Add a helper function to get/put the root bus's host bridge device.
Cc: Joerg Roedel <j...@8bytes.org>
Cc: Grant Likely <grant.lik...@linaro.org>
Cc: Rob Herring <robh...@kernel.org>
Cc: Will Deacon <will.dea...@arm.com>
Cc: Russell King <li...@arm.linux.org.uk>
Cc: Arnd Bergmann <a...@arndb.de>
Cc: Suravee Suthikulpanit <suravee.suthikulpa...@amd.com>
Acked-by: Bjorn Helgaas <bhelg...@google.com>
Signed-off-by: Murali Karicheri <m-kariche...@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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