diff options
| -rw-r--r-- | hw/pcnet.c | 15 |
1 files changed, 14 insertions, 1 deletions
@@ -57,6 +57,7 @@ struct PCNetState_st { uint64_t timer; int xmit_pos, recv_pos; uint8_t buffer[4096]; + int tx_busy; }; #ifdef __GNUC__ @@ -659,6 +660,8 @@ static void pcnet_s_reset(PCNetState *s) s->csr[114] = 0x0000; s->csr[122] = 0x0000; s->csr[124] = 0x0000; + + s->tx_busy = 0; } static void pcnet_update_irq(PCNetState *s) @@ -1104,7 +1107,9 @@ static void pcnet_transmit(PCNetState *s) s->csr[0] &= ~0x0008; return; } - + + s->tx_busy = 1; + txagain: if (pcnet_tdte_poll(s)) { struct pcnet_TMD tmd; @@ -1167,6 +1172,8 @@ static void pcnet_transmit(PCNetState *s) if (count--) goto txagain; } + + s->tx_busy = 0; } static void pcnet_poll(PCNetState *s) @@ -1177,7 +1184,13 @@ static void pcnet_poll(PCNetState *s) if (CSR_TDMD(s) || (CSR_TXON(s) && !CSR_DPOLL(s) && pcnet_tdte_poll(s))) + { + /* prevent recursion */ + if (s->tx_busy) + return; + pcnet_transmit(s); + } } static void pcnet_poll_timer(void *opaque) |