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authorDaniel Mack <daniel@caiaq.de>2009-06-03 17:44:49 +0200
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-06-04 13:24:08 +0100
commite3509ff0fb9df53e45cd68488e3b463a80455db7 (patch)
tree9d13f9747af6107ca194e1be142db2a7041f5c18
parentd08664fdb50795b29cf70b0269ea02f7248e76c3 (diff)
ASoC: fix NULL pointer dereference in soc_suspend()
In case the initalization of an soc_device failed, there is no codec associated with it. soc_suspend() will still dereference the pointer and cause an Ooops when entering the sleep mode. This happens on our board with a multi-target kernel image when booted on a machine without audio circuits. This patch makes the code bail out very early in this special case. Signed-off-by: Daniel Mack <daniel@caiaq.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
-rw-r--r--sound/soc/soc-core.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 4aa8e2d3506..3f44150d8e3 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -628,6 +628,12 @@ static int soc_suspend(struct platform_device *pdev, pm_message_t state)
struct snd_soc_codec *codec = card->codec;
int i;
+ /* If the initialization of this soc device failed, there is no codec
+ * associated with it. Just bail out in this case.
+ */
+ if (!codec)
+ return 0;
+
/* Due to the resume being scheduled into a workqueue we could
* suspend before that's finished - wait for it to complete.
*/