[PATCH 4.4.y] ASoC: rsnd: don't call update callback if it was NULL

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From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>

commit d7289565483c65094d0473555625a4acd89567d3 upstream.

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Thong Ho <thong.ho.px@xxxxxxxxxxxxxxx>
Signed-off-by: Nhan Nguyen <nhan.nguyen.yb@xxxxxxxxxxx>
---
 sound/soc/sh/rcar/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/sh/rcar/core.c b/sound/soc/sh/rcar/core.c
index ba37b0d..3a3dc2f 100644
--- a/sound/soc/sh/rcar/core.c
+++ b/sound/soc/sh/rcar/core.c
@@ -927,7 +927,7 @@ static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
 		}
 	}
 
-	if (change)
+	if (change && cfg->update)
 		cfg->update(cfg->io, mod);
 
 	return change;
-- 
1.9.1




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