ACPI: video: Don't call absent methods

Signed-off-by: Ryan May <rmay@ou.edu>
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 3c9bb85..83aa41c 100644 (file)
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -409,14 +409,16 @@ acpi_video_device_lcd_query_levels(struct acpi_video_device *device,
 static int
 acpi_video_device_lcd_set_level(struct acpi_video_device *device, int level)
 {
-       int status;
+       int status = AE_OK;
        union acpi_object arg0 = { ACPI_TYPE_INTEGER };
        struct acpi_object_list args = { 1, &arg0 };
 
 
        arg0.integer.value = level;
-       status = acpi_evaluate_object(device->dev->handle, "_BCM", &args, NULL);
-
+       if (device->cap._BCM)
+               status = acpi_evaluate_object(device->dev->handle, "_BCM",
+                                             &args, NULL);
+       device->brightness->curr = level;
        printk(KERN_DEBUG "set_level status: %x\n", status);
        return status;
 }
@@ -425,11 +427,11 @@ static int
 acpi_video_device_lcd_get_level_current(struct acpi_video_device *device,
                                        unsigned long *level)
 {
-       int status;
-
-       status = acpi_evaluate_integer(device->dev->handle, "_BQC", NULL, level);
-
-       return status;
+       if (device->cap._BQC)
+               return acpi_evaluate_integer(device->dev->handle, "_BQC", NULL,
+                                            level);
+       *level = device->brightness->curr;
+       return AE_OK;
 }
 
 static int