diff --git a/arch/ia64/sn/kernel/tiocx.c b/arch/ia64/sn/kernel/tiocx.c
index 14c1711238c0..e35f6485c1fd 100644
--- a/arch/ia64/sn/kernel/tiocx.c
+++ b/arch/ia64/sn/kernel/tiocx.c
@@ -490,11 +490,14 @@ static int __init tiocx_init(void)
 {
 	cnodeid_t cnodeid;
 	int found_tiocx_device = 0;
+	int err;
 
 	if (!ia64_platform_is("sn2"))
 		return 0;
 
-	bus_register(&tiocx_bus_type);
+	err = bus_register(&tiocx_bus_type);
+	if (err)
+		return err;
 
 	for (cnodeid = 0; cnodeid < num_cnodes; cnodeid++) {
 		nasid_t nasid;