--- a/master/cdev.c	Thu Jun 05 12:39:46 2008 +0000
+++ b/master/cdev.c	Thu Jun 05 14:33:36 2008 +0000
@@ -449,6 +449,12 @@
                 break;
             }
 
+        case EC_IOCTL_DEBUG_LEVEL:
+            if (ec_master_debug_level(master, (unsigned int) arg)) {
+                retval = -EINVAL;
+            }
+            break;
+
         default:
             retval = -ENOIOCTLCMD;
     }