Index: uspace/drv/block/ata_bd/main.c
===================================================================
--- uspace/drv/block/ata_bd/main.c	(revision c8ea6eca1c41df9b67e9c83a3b830bb036e10da8)
+++ uspace/drv/block/ata_bd/main.c	(revision 737ebf303532be0cc0b22233d0ef1a31b9701e5c)
@@ -162,4 +162,5 @@
 	ddf_fun_t *fun = NULL;
 	ata_fun_t *afun = NULL;
+	bool bound = false;
 
 	fun_name = ata_fun_name(disk);
@@ -202,5 +203,12 @@
 	}
 
-	ddf_fun_add_to_category(fun, "disk");
+	bound = true;
+
+	rc = ddf_fun_add_to_category(fun, "disk");
+	if (rc != EOK) {
+		ddf_msg(LVL_ERROR, "Failed adding function %s to "
+		    "category 'disk': %s", fun_name, str_error(rc));
+		goto error;
+	}
 
 	free(fun_name);
@@ -208,4 +216,6 @@
 	return EOK;
 error:
+	if (bound)
+		ddf_fun_unbind(fun);
 	if (fun != NULL)
 		ddf_fun_destroy(fun);