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[11/20] ASoC: rsnd: tidyup rsnd_io_to_runtime() macro

Message ID 87r3wp83ud.wl%kuninori.morimoto.gx@renesas.com (mailing list archive)
State Accepted
Commit 0cf7718520dcd673d385105d92a6b1ab923ee373
Headers show

Commit Message

Kuninori Morimoto Nov. 27, 2014, 8:06 a.m. UTC 
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>

Avoid NULL pointer access

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
---
 sound/soc/sh/rcar/rsnd.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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Patch

diff --git a/sound/soc/sh/rcar/rsnd.h b/sound/soc/sh/rcar/rsnd.h
index 133ba1f..5826c8a 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);