TXX9_SIDISR_UBRK
if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER |
if (disr & TXX9_SIDISR_UBRK) {
if (disr & TXX9_SIDISR_UBRK) {
up->read_status_mask |= TXX9_SIDISR_UBRK;
up->ignore_status_mask |= TXX9_SIDISR_UBRK;