diff --git a/sys/dev/drm/drm_file.c b/sys/dev/drm/drm_file.c
--- a/sys/dev/drm/drm_file.c
+++ b/sys/dev/drm/drm_file.c
@@ -371,7 +371,12 @@
 #endif
 	struct drm_file *file_priv = filp->private_data;
 	struct drm_minor *minor = drm_minor_acquire(iminor(inode));
-	struct drm_device *dev = minor->dev;
+	struct drm_device *dev;
+
+	if (IS_ERR(minor))
+		return;
+
+	dev = minor->dev;
 
 	mutex_lock(&drm_global_mutex);