PCI: aerdrv: rework find_aer_service

The structure find_aer_service_data is no longer useful.

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Reviewed-by: Jin Dongming <jin.dongming@np.css.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 8d458a0..8fb14ae 100644 (file)
--- a/drivers/pci/pcie/aer/aerdrv_core.c
+++ b/drivers/pci/pcie/aer/aerdrv_core.c
@@ -373,21 +373,16 @@ static pci_ers_result_t broadcast_error_message(struct pci_dev *dev,
        return result_data.result;
 }
 
-struct find_aer_service_data {
-       struct pcie_port_service_driver *aer_driver;
-};
-
 static int find_aer_service_iter(struct device *device, void *data)
 {
-       struct pcie_port_service_driver *service_driver;
-       struct find_aer_service_data *result;
+       struct pcie_port_service_driver *service_driver, **drv;
 
-       result = (struct find_aer_service_data *) data;
+       drv = (struct pcie_port_service_driver **) data;
 
        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;
+                       *drv = service_driver;
                        return 1;
                }
        }
@@ -395,11 +390,13 @@ static int find_aer_service_iter(struct device *device, void *data)
        return 0;
 }
 
-static void find_aer_service(struct pci_dev *dev,
-               struct find_aer_service_data *data)
+static struct pcie_port_service_driver *find_aer_service(struct pci_dev *dev)
 {
-       int retval;
-       retval = device_for_each_child(&dev->dev, data, find_aer_service_iter);
+       struct pcie_port_service_driver *drv = NULL;
+
+       device_for_each_child(&dev->dev, &drv, find_aer_service_iter);
+
+       return drv;
 }
 
 static pci_ers_result_t reset_link(struct pcie_device *aerdev,
@@ -407,26 +404,24 @@ static pci_ers_result_t reset_link(struct pcie_device *aerdev,
 {
        struct pci_dev *udev;
        pci_ers_result_t status;
-       struct find_aer_service_data data;
+       struct pcie_port_service_driver *driver;
 
        if (dev->hdr_type & PCI_HEADER_TYPE_BRIDGE)
                udev = dev;
        else
                udev = dev->bus->self;
 
-       data.aer_driver = NULL;
-       find_aer_service(udev, &data);
+       /* Use the aer driver of the component firstly */
+       driver = find_aer_service(udev);
 
        /*
-        * Use the aer driver of the error agent firstly.
-        * If it hasn't the aer driver, use the root port's
+        * If it hasn't the driver and is downstream port, use the root port's
         */
-       if (!data.aer_driver || !data.aer_driver->reset_link) {
+       if (!driver || !driver->reset_link) {
                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);
+                       driver = to_service_driver(aerdev->device.driver);
                } else {
                        dev_printk(KERN_DEBUG, &dev->dev,
                                "no link-reset support at upstream device %s\n",
@@ -435,7 +430,7 @@ static pci_ers_result_t reset_link(struct pcie_device *aerdev,
                }
        }
 
-       status = data.aer_driver->reset_link(udev);
+       status = driver->reset_link(udev);
        if (status != PCI_ERS_RESULT_RECOVERED) {
                dev_printk(KERN_DEBUG, &dev->dev,
                        "link reset at upstream device %s failed\n",