Hi All, Request for comments if my understanding is right here. Thanks.
On 1/19/2020 7:49 PM, Sameer Pujar wrote:
Crash happens in snd_soc_dapm_new_dai() when substream->private_data access is made and substream is NULL here. This is seen for DAIs where only playback or capture stream is defined. This seems to be happening for codec2codec DAI link.
Both playback and capture are 0 during soc_new_pcm(). This is probably happening because cpu_dai and codec_dai are both validated either for SNDRV_PCM_STREAM_PLAYBACK or SNDRV_PCM_STREAM_CAPTURE.
Shouldn't be playback = 1 when,
- playback stream is available for codec_dai AND
- capture stream is available for cpu_dai
and vice-versa for capture = 1?
Signed-off-by: Sameer Pujar spujar@nvidia.com
sound/soc/soc-pcm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c index 74d340d..5aa9c0b 100644 --- a/sound/soc/soc-pcm.c +++ b/sound/soc/soc-pcm.c @@ -2855,10 +2855,10 @@ int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
for_each_rtd_codec_dai(rtd, i, codec_dai) { if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK))
snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE)) playback = 1; if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_CAPTURE) &&
snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_CAPTURE))
snd_soc_dai_stream_valid(cpu_dai, SNDRV_PCM_STREAM_PLAYBACK)) capture = 1;