title: I2C; update DMAENGINE API to avoid deprecated functions
team: IO
key: 80032418-faad-11eb-80f4-3fc903436b31
status: New

comments:
 - "dmaengine_terminate_all() is deprecated and needs to be replaced"
 - "because we set up DMA transfers in irq context, we need dmaengine_terminate_async() instead"
 - "this needs synchronization code to avoid race conditions"