If a DAI specifies "#sound-dai-cells = <0>" in device-tree then hdmi_of_xlate_dai_name() will be called with zero args, which it isn't implemented to cope with. The resulting use of an uninitialised variable for the id will usually result in an error like:

asoc-simple-card sound: parse error -11 asoc-simple-card: probe of sound failed with error -11

Fix this by using and id of zero if no arg is provided.

Fixes: 9731f82d6016 ("ASoC: hdmi-codec: enable multi probe for same device")

Signed-off-by: Jon Medhurst tixy@linaro.org ---

Jyri, FYI, I believe this issue broke your commit df0bd1e8f3c508 ("ARM: dts: am335x-boneblack: Add HDMI audio support")

sound/soc/codecs/hdmi-codec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/hdmi-codec.c b/sound/soc/codecs/hdmi-codec.c index b904492..6661ace 100644 --- a/sound/soc/codecs/hdmi-codec.c +++ b/sound/soc/codecs/hdmi-codec.c @@ -364,7 +364,7 @@ static int hdmi_of_xlate_dai_name(struct snd_soc_component *component, struct of_phandle_args *args, const char **dai_name) { - int id = args->args[0]; + int id = args->args_count ? args->args[0] : 0;

if (id < ARRAY_SIZE(hdmi_dai_name)) { *dai_name = hdmi_dai_name[id];