IR_RF0N
if (irqstatus & IR_RF0N) {
if (cdev->rx_coalesce_usecs_irq > 0 && (ir & (IR_RF0N | IR_RF0W))) {
new_interrupts &= ~IR_RF0N;
new_interrupts |= IR_RF0N;
if (ir & (IR_RF0N | IR_RF0W | IR_ERR_ALL_30X)) {
m_can_write(cdev, M_CAN_IE, IR_RF0N);
cdev->active_interrupts |= IR_RF0N | IR_TEFN;
u32 new_interrupts = cdev->active_interrupts | IR_RF0N | IR_TEFN;