MAX_PKTS_PER_MSG
if (off + rem > MAX_PKTS_PER_MSG * APPLESPI_PACKET_SIZE) {
if (off + len > MAX_PKTS_PER_MSG * APPLESPI_PACKET_SIZE) {
applespi->msg_buf = devm_kmalloc_array(&spi->dev, MAX_PKTS_PER_MSG,