On Fri, Feb 26, 2021 at 01:40:35PM +0100, Marc Kleine-Budde wrote: > I think you cannot do (synchronous) SPI from NAPI (which is SoftIRQ context). I see. I now understand why you recommend using mcp251xfd as a template for m_can. Am I correct in saying that rx-offload requires RX timestamps to be available? They can be enabled in M_CAN, but the v3.3 manual states that the internal timestamp generation (apparently only option for tcan4x5x) cannot be used for CAN-FD. -- Regards, Torin Cooper-Bennun Software Engineer | maxiluxsystems.com