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PCI/portdrv: Add generic pcie_port_find_device()

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Add generic pcie_port_find_device() routine.

Signed-off-by: Oza Pawandeep <poza@codeaurora.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
This commit is contained in:
Oza Pawandeep 2018-05-17 16:44:17 -05:00 committed by Bjorn Helgaas
parent f252d0621a
commit e76d596aef
2 changed files with 24 additions and 0 deletions
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1
drivers/pci/pcie/portdrv.h
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@ -114,4 +114,5 @@ static inline void pcie_pme_interrupt_enable(struct pci_dev *dev, bool en) {}
struct pcie_port_service_driver *pcie_port_find_service(struct pci_dev *dev,
u32 service);
struct device *pcie_port_find_device(struct pci_dev *dev, u32 service);
#endif /* _PORTDRV_H_ */

23
drivers/pci/pcie/portdrv_core.c
View file

@ -21,6 +21,7 @@
struct portdrv_service_data {
struct pcie_port_service_driver *drv;
struct device *dev;
u32 service;
};
@ -416,6 +417,7 @@ static int find_service_iter(struct device *device, void *data)
service_driver = to_service_driver(device->driver);
if (service_driver->service == service) {
pdrvs->drv = service_driver;
pdrvs->dev = device;
return 1;
}
}
@ -444,6 +446,27 @@ struct pcie_port_service_driver *pcie_port_find_service(struct pci_dev *dev,
return drv;
}
/**
* pcie_port_find_device - find the struct device
* @dev: PCI Express port the service is associated with
* @service: For the service to find
*
* Find the struct device associated with given service on a pci_dev
*/
struct device *pcie_port_find_device(struct pci_dev *dev,
u32 service)
{
struct device *device;
struct portdrv_service_data pdrvs;
pdrvs.dev = NULL;
pdrvs.service = service;
device_for_each_child(&dev->dev, &pdrvs, find_service_iter);
device = pdrvs.dev;
return device;
}
/**
* pcie_port_device_remove - unregister PCI Express port service devices
* @dev: PCI Express port the service devices to unregister are associated with