For any request that includes an associated payload, the
integrated block can signal an error in the transferred payload by asserting the
discontinue signal in the m_axis_cq_tuser bus in the last
beat of the packet (along with m_axis_cq_tlast). This occurs when the
integrated block has detected an uncorrectable error while reading data from its internal
memories. The user application must discard the entire packet when it has detected
discontinue asserted in the last beat of a packet. This condition is
considered a fatal error in the integrated block.