On Sat, Mar 18, 2023 at 09:20:05AM +0900, Takashi Sakamoto wrote: > 1. Failure at tasklet for URB completion > > It is softIRQ context. The stream lock is not acquired. It doesn't > matter to call current XRUN API. > > 2. Failure at PCM operation called by ALSA PCM application > > It is process context. The stream lock is acquired before calling driver > code. When detecting any type of failure, driver code stores the state. > Then .pointer callback should return SNDRV_PCM_IOCTL_HWSYNC refering to > the state. Oops. I did copy-and-paste mistake here... It should be SNDRV_PCM_POS_XRUN instead of SNDRV_PCM_IOCTL_HWSYNC... Regards Takashi Sakamoto
