diff --git a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
index 2f46e0c..a8cd9b0 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c
@@ -328,11 +328,27 @@ static int radeon_legacy_backlight_update_status(struct backlight_device *bd)
 static int radeon_legacy_backlight_get_brightness(struct backlight_device *bd)
 {
 	struct radeon_backlight_privdata *pdata = bl_get_data(bd);
-	struct radeon_encoder *radeon_encoder = pdata->encoder;
-	struct drm_device *dev = radeon_encoder->base.dev;
-	struct radeon_device *rdev = dev->dev_private;
+	struct radeon_encoder *radeon_encoder;
+	struct drm_device *dev;
+	struct radeon_device *rdev;
 	uint8_t backlight_level;
 
+	DRM_INFO("pdata=%p\n", pdata);
+	if (!pdata)
+		return MAX_RADEON_LEVEL;
+	radeon_encoder = pdata->encoder;
+	DRM_INFO("radeon_encoder=%p\n", radeon_encoder);
+	if (!radeon_encoder)
+		return MAX_RADEON_LEVEL;
+	dev = radeon_encoder->base.dev;
+	DRM_INFO("dev=%p\n", dev);
+	if (!dev)
+		return MAX_RADEON_LEVEL;
+	rdev = dev->dev_private;
+	DRM_INFO("rdev=%p\n", rdev);
+	if (!rdev)
+		return MAX_RADEON_LEVEL;
+
 	backlight_level = (RREG32(RADEON_LVDS_GEN_CNTL) >>
 			   RADEON_LVDS_BL_MOD_LEVEL_SHIFT) & 0xff;