ASoC: rsnd: rsnd_dai_connect() returns error if it connect to existing mod

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c
index 44f32c1db05d..e59dc8a461bb 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);