PCI/portdrv: Add generic pcie_port_find_device()

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>

diff --git a/drivers/pci/pcie/portdrv.h b/drivers/pci/pcie/portdrv.h
index ba6c963..d82401a 100644 (file)
--- a/drivers/pci/pcie/portdrv.h
+++ b/drivers/pci/pcie/portdrv.h
@@ -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_ */

diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index 62468d2..a9c581d 100644 (file)
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -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;
                }
        }
@@ -445,6 +447,27 @@ struct pcie_port_service_driver *pcie_port_find_service(struct pci_dev *dev,
 }
 
 /**
+ * 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
  *