[PATCH 1/2 V2] USB: Use ACPI device information

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From: Faouaz TENOUTIT <faouaz.tenoutit@xxxxxxxxx>

Use ACPI device pld information instead of calling
acpi_get_physical_device_location.

Signed-off-by: Faouaz TENOUTIT <faouaz.tenoutit@xxxxxxxxx>
Acked-by: Samuel Ortiz <samuel.ortiz@xxxxxxxxx>
---
 drivers/acpi/scan.c         | 13 +++++++++++++
 drivers/usb/core/usb-acpi.c | 14 +++++---------
 include/acpi/acpi_bus.h     |  1 +
 3 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index f775fa0..7ad6beb 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -764,6 +764,13 @@ static int acpi_device_setup_files(struct acpi_device *dev)
                             &dev_attr_real_power_state);
     }

+    /*
+     * If device has _PLD, initialize the 'pld' struct
+     */
+    if (acpi_has_method(dev->handle, "_PLD"))
+        acpi_get_physical_device_location(dev->handle,
+                    &dev->pld);
+
 end:
     return result;
 }
@@ -803,6 +810,12 @@ static void acpi_device_remove_files(struct acpi_device *dev)
         device_remove_file(&dev->dev, &dev_attr_status);
     if (dev->handle)
         device_remove_file(&dev->dev, &dev_attr_path);
+
+    /*
+     * If device has _PLD, free 'pld' struct
+     */
+    if (dev->pld)
+        ACPI_FREE(dev->pld);
 }
 /* --------------------------------------------------------------------------
             ACPI Bus operations
diff --git a/drivers/usb/core/usb-acpi.c b/drivers/usb/core/usb-acpi.c
index 2776cfe..a8cbb72 100644
--- a/drivers/usb/core/usb-acpi.c
+++ b/drivers/usb/core/usb-acpi.c
@@ -157,9 +157,6 @@ static struct acpi_device *usb_acpi_find_companion(struct device *dev)
     } else if (is_usb_port(dev)) {
         struct usb_port *port_dev = to_usb_port(dev);
         int port1 = port_dev->portnum;
-        struct acpi_pld_info *pld;
-        acpi_handle *handle;
-        acpi_status status;

         /* Get the struct usb_device point of port's hub */
         udev = to_usb_device(dev->parent->parent);
@@ -190,15 +187,14 @@ static struct acpi_device *usb_acpi_find_companion(struct device *dev)
             if (!adev)
                 return NULL;
         }
-        handle = adev->handle;
-        status = acpi_get_physical_device_location(handle, &pld);
-        if (ACPI_FAILURE(status) || !pld)
+        if (!adev->pld)
             return adev;

         port_dev->location = USB_ACPI_LOCATION_VALID
-            | pld->group_token << 8 | pld->group_position;
-        port_dev->connect_type = usb_acpi_get_connect_type(handle, pld);
-        ACPI_FREE(pld);
+            | adev->pld->group_token << 8
+            | adev->pld->group_position;
+        port_dev->connect_type = usb_acpi_get_connect_type(adev->handle,
+                adev->pld);

         return adev;
     }
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index b571458..1b05d07 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -350,6 +350,7 @@ struct acpi_device {
     struct acpi_scan_handler *handler;
     struct acpi_hotplug_context *hp;
     struct acpi_driver *driver;
+    struct acpi_pld_info *pld;
     void *driver_data;
     struct device dev;
     unsigned int physical_node_count;
--
2.0.0


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