From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Thu, 27 Nov 2014 08:06:25 +0000 (+0000)
Subject: ASoC: rsnd: tidyup rsnd_io_to_runtime() macro
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0cf7718520dcd673d385105d92a6b1ab923ee373;p=linux-beck.git

ASoC: rsnd: tidyup rsnd_io_to_runtime() macro

Avoid NULL pointer access

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

diff --git a/sound/soc/sh/rcar/rsnd.h b/sound/soc/sh/rcar/rsnd.h
index 133ba1f44a86..5826c8abf794 100644
--- a/sound/soc/sh/rcar/rsnd.h
+++ b/sound/soc/sh/rcar/rsnd.h
@@ -303,7 +303,8 @@ struct rsnd_dai *rsnd_dai_get(struct rsnd_priv *priv, int id);
 int rsnd_dai_is_play(struct rsnd_dai *rdai, struct rsnd_dai_stream *io);
 int rsnd_dai_id(struct rsnd_priv *priv, struct rsnd_dai *rdai);
 #define rsnd_dai_get_platform_info(rdai) ((rdai)->info)
-#define rsnd_io_to_runtime(io) ((io)->substream->runtime)
+#define rsnd_io_to_runtime(io) ((io)->substream ? \
+				(io)->substream->runtime : NULL)
 
 void rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int cnt);
 int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional);