PCI: aerdrv: remove is_downstream

The pcie->port of port service device points the port associated
the service with.  The find_aer_service iterates over children of
given port udev.

So it is clear that the pcie->port of port service of given port
udev must always point the udev.

Therefore we can know the type of udev without checking its children.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/drivers/pci/pcie/aer/aerdrv_core.c b/drivers/pci/pcie/aer/aerdrv_core.c
index 9dcd3ae..8d458a0 100644 (file)
--- a/drivers/pci/pcie/aer/aerdrv_core.c
+++ b/drivers/pci/pcie/aer/aerdrv_core.c
@@ -375,30 +375,20 @@ static pci_ers_result_t broadcast_error_message(struct pci_dev *dev,
 
 struct find_aer_service_data {
        struct pcie_port_service_driver *aer_driver;
-       int is_downstream;
 };
 
 static int find_aer_service_iter(struct device *device, void *data)
 {
-       struct device_driver *driver;
        struct pcie_port_service_driver *service_driver;
        struct find_aer_service_data *result;
 
        result = (struct find_aer_service_data *) data;
 
-       if (device->bus == &pcie_port_bus_type) {
-               struct pcie_device *pcie = to_pcie_device(device);
-
-               if (pcie->port->pcie_type == PCI_EXP_TYPE_DOWNSTREAM)
-                       result->is_downstream = 1;
-
-               driver = device->driver;
-               if (driver) {
-                       service_driver = to_service_driver(driver);
-                       if (service_driver->service == PCIE_PORT_SERVICE_AER) {
-                               result->aer_driver = service_driver;
-                               return 1;
-                       }
+       if (device->bus == &pcie_port_bus_type && device->driver) {
+               service_driver = to_service_driver(device->driver);
+               if (service_driver->service == PCIE_PORT_SERVICE_AER) {
+                       result->aer_driver = service_driver;
+                       return 1;
                }
        }
 
@@ -424,7 +414,6 @@ static pci_ers_result_t reset_link(struct pcie_device *aerdev,
        else
                udev = dev->bus->self;
 
-       data.is_downstream = 0;
        data.aer_driver = NULL;
        find_aer_service(udev, &data);
 
@@ -433,22 +422,24 @@ static pci_ers_result_t reset_link(struct pcie_device *aerdev,
         * If it hasn't the aer driver, use the root port's
         */
        if (!data.aer_driver || !data.aer_driver->reset_link) {
-               if (data.is_downstream &&
+               if (udev->pcie_type == PCI_EXP_TYPE_DOWNSTREAM &&
                        aerdev->device.driver &&
                        to_service_driver(aerdev->device.driver)->reset_link) {
                        data.aer_driver =
                                to_service_driver(aerdev->device.driver);
                } else {
-                       dev_printk(KERN_DEBUG, &dev->dev, "no link-reset "
-                                  "support\n");
+                       dev_printk(KERN_DEBUG, &dev->dev,
+                               "no link-reset support at upstream device %s\n",
+                               pci_name(udev));
                        return PCI_ERS_RESULT_DISCONNECT;
                }
        }
 
        status = data.aer_driver->reset_link(udev);
        if (status != PCI_ERS_RESULT_RECOVERED) {
-               dev_printk(KERN_DEBUG, &dev->dev, "link reset at upstream "
-                          "device %s failed\n", pci_name(udev));
+               dev_printk(KERN_DEBUG, &dev->dev,
+                       "link reset at upstream device %s failed\n",
+                       pci_name(udev));
                return PCI_ERS_RESULT_DISCONNECT;
        }