diff --git a/arch/sh/kernel/io_trapped.c b/arch/sh/kernel/io_trapped.c
index 69be603aa2d7..e9e5ed33ab4f 100644
--- a/arch/sh/kernel/io_trapped.c
+++ b/arch/sh/kernel/io_trapped.c
@@ -271,6 +271,8 @@ int handle_trapped_io(struct pt_regs *regs, unsigned long address)
 	insn_size_t instruction;
 	int tmp;
 
+	if (trapped_io_disable)
+		return 0;
 	if (!lookup_tiop(address))
 		return 0;