> > Is this a bugfix needed for older kernels as well? When did this issue show > up? > > thanks, > > greg k-h It happens when DMA stop moving data from host to DSP/DAI for a long time (> half of buffer time). I know host driver should do something about it. But if not, the HWSYNC will keep increasing the hw_base and hw_ptr and confuses user space program. Regards, Brent