diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c
index 44f32c1db05d9c5315b244b0c6f739ecb72d1cc2..e59dc8a461bb2d0bb20ee16fe2a70960ca8284fa 100644
--- a/sound/soc/sh/rcar/core.c
+++ b/sound/soc/sh/rcar/core.c
@@ -354,6 +354,9 @@ int rsnd_dai_connect(struct rsnd_mod *mod,
 	if (!mod)
 		return -EIO;
 
+	if (io->mod[type])
+		return -EINVAL;
+
 	priv = rsnd_mod_to_priv(mod);
 	dev = rsnd_priv_to_dev(priv);