Hi,
it seems there is a bug in soc_pcm_open. In some case [1] we are in a error path, but we don't set the ret return value.
This cause bug/crash from alsa core.
Thanks
Matthieu
[1]http://hg-mirror.alsa-project.org/alsa-kernel/file/38926de0e79c/soc/soc-core... if (!runtime->hw.rates) {
218 printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
219 codec_dai->name, cpu_dai->name);
220 goto machine_err;
221 }
222 if (!runtime->hw.formats) {
223 printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
224 codec_dai->name, cpu_dai->name);
225 goto machine_err;
226 }
227 if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
228 printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
229 codec_dai->name, cpu_dai->name);
230 goto machine_err;
231 }