1 files changed, 14 insertions, 1 deletions

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index a9eec8c95a1f..a18e497f1c3c 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -782,6 +782,9 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
 
         if (acpi_video_backlight_support()) {
                 struct backlight_properties props;
+                struct pci_dev *pdev;
+                acpi_handle acpi_parent;
+                struct device *parent = NULL;
                 int result;
                 static int count = 0;
                 char *name;
@@ -794,10 +797,20 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
                         return;
                 count++;
 
+                acpi_get_parent(device->dev->handle, &acpi_parent);
+
+                pdev = acpi_get_pci_dev(acpi_parent);
+                if (pdev) {
+                        parent = &pdev->dev;
+                        pci_dev_put(pdev);
+                }
+
                 memset(&props, 0, sizeof(struct backlight_properties));
                 props.type = BACKLIGHT_FIRMWARE;
                 props.max_brightness = device->brightness->count - 3;
-                device->backlight = backlight_device_register(name, NULL, device,
+                device->backlight = backlight_device_register(name,
+                                                              parent,
+                                                              device,
                                                               &acpi_backlight_ops,
                                                               &props);
                 kfree(name);