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PCI: Add helper functions pci_get[put]_host_bridge_device()

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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>
This commit is contained in:
Murali Karicheri 2015-03-03 12:52:11 -05:00 committed by Bjorn Helgaas
parent 0c79c81c77
commit 6675a601d7
2 changed files with 17 additions and 0 deletions
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14
drivers/pci/host-bridge.c
View File

@ -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)

3
include/linux/pci.h
View File

@ -510,6 +510,9 @@ 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)
{