diff options
| -rw-r--r-- | hw/serial.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/hw/serial.c b/hw/serial.c index c0ee55d20c..b499bca659 100644 --- a/hw/serial.c +++ b/hw/serial.c @@ -327,6 +327,8 @@ static void serial_xmit(void *opaque) s->tsr = fifo_get(s,XMIT_FIFO); if (!s->xmit_fifo.count) s->lsr |= UART_LSR_THRE; + } else if ((s->lsr & UART_LSR_THRE)) { + return; } else { s->tsr = s->thr; s->lsr |= UART_LSR_THRE; @@ -337,7 +339,7 @@ static void serial_xmit(void *opaque) /* in loopback mode, say that we just received a char */ serial_receive1(s, &s->tsr, 1); } else if (qemu_chr_fe_write(s->chr, &s->tsr, 1) != 1) { - if ((s->tsr_retry > 0) && (s->tsr_retry <= MAX_XMIT_RETRY)) { + if ((s->tsr_retry >= 0) && (s->tsr_retry <= MAX_XMIT_RETRY)) { s->tsr_retry++; qemu_mod_timer(s->transmit_timer, new_xmit_ts + s->char_transmit_time); return; |