e1000: flush queue whenever can_receive can go from false to true
When the guests replenish the receive ring buffer, the network device should flush its queue of pending packets. This is done with qemu_flush_queued_packets. e1000's can_receive can go from false to true when RCTL or RDT are modified. Reported-by: Luigi Rizzo <rizzo@iet.unipi.it> Cc: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Cc: Jan Kiszka <jan.kiszka@siemens.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Amos Kong <akong@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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@ -295,6 +295,7 @@ set_rx_control(E1000State *s, int index, uint32_t val)
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s->rxbuf_min_shift = ((val / E1000_RCTL_RDMTS_QUAT) & 3) + 1;
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DBGOUT(RX, "RCTL: %d, mac_reg[RCTL] = 0x%x\n", s->mac_reg[RDT],
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s->mac_reg[RCTL]);
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qemu_flush_queued_packets(&s->nic->nc);
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}
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static void
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@ -926,6 +927,9 @@ set_rdt(E1000State *s, int index, uint32_t val)
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{
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s->check_rxov = 0;
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s->mac_reg[index] = val & 0xffff;
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if (e1000_has_rxbufs(s, 1)) {
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qemu_flush_queued_packets(&s->nic->nc);
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}
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}
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static void
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