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Commit 6675a601 authored by Murali Karicheri's avatar Murali Karicheri Committed by Bjorn Helgaas
Browse files

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: default avatarMurali Karicheri <m-karicheri2@ti.com>
Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Reviewed-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Acked-by: default avatarWill 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>
parent 0c79c81c

drivers/pci/host-bridge.c

+14 −0
Original line number Diff line number Diff line
@@ -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)

include/linux/pci.h

+3 −0
Original line number Diff line number Diff line
@@ -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)

{