1 files changed, 22 insertions, 13 deletions

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index a3aad30d39f6..baa441929720 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -738,7 +738,8 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
                 device->cap._DSS = 1;
         }
 
-        max_level = acpi_video_init_brightness(device);
+        if (acpi_video_backlight_support())
+                max_level = acpi_video_init_brightness(device);
 
         if (device->cap._BCL && device->cap._BCM && max_level > 0) {
                 int result;
@@ -784,18 +785,21 @@ static void acpi_video_device_find_cap(struct acpi_video_device *device)
                         printk(KERN_ERR PREFIX "Create sysfs link\n");
 
         }
-        if (device->cap._DCS && device->cap._DSS){
-                static int count = 0;
-                char *name;
-                name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
-                if (!name)
-                        return;
-                sprintf(name, "acpi_video%d", count++);
-                device->output_dev = video_output_register(name,
-                                NULL, device, &acpi_output_properties);
-                kfree(name);
+
+        if (acpi_video_display_switch_support()) {
+
+                if (device->cap._DCS && device->cap._DSS) {
+                        static int count;
+                        char *name;
+                        name = kzalloc(MAX_NAME_LEN, GFP_KERNEL);
+                        if (!name)
+                                return;
+                        sprintf(name, "acpi_video%d", count++);
+                        device->output_dev = video_output_register(name,
+                                        NULL, device, &acpi_output_properties);
+                        kfree(name);
+                }
         }
-        return;
 }
 
 /*
@@ -841,11 +845,16 @@ static void acpi_video_bus_find_cap(struct acpi_video_bus *video)
 static int acpi_video_bus_check(struct acpi_video_bus *video)
 {
         acpi_status status = -ENOENT;
-
+        struct device *dev;
 
         if (!video)
                 return -EINVAL;
 
+        dev = acpi_get_physical_pci_device(video->device->handle);
+        if (!dev)
+                return -ENODEV;
+        put_device(dev);
+
         /* Since there is no HID, CID and so on for VGA driver, we have
          * to check well known required nodes.
          */