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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>
This commit is contained in:
Paolo Bonzini 2012-08-09 16:45:56 +02:00 committed by Stefan Hajnoczi
parent 987a9b4800
commit e8b4c680b4
1 changed files with 4 additions and 0 deletions
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4
hw/e1000.c
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@ -295,6 +295,7 @@ set_rx_control(E1000State *s, int index, uint32_t val)
s->rxbuf_min_shift = ((val / E1000_RCTL_RDMTS_QUAT) & 3) + 1; s->rxbuf_min_shift = ((val / E1000_RCTL_RDMTS_QUAT) & 3) + 1;
DBGOUT(RX, "RCTL: %d, mac_reg[RCTL] = 0x%x\n", s->mac_reg[RDT], DBGOUT(RX, "RCTL: %d, mac_reg[RCTL] = 0x%x\n", s->mac_reg[RDT],
s->mac_reg[RCTL]); s->mac_reg[RCTL]);
qemu_flush_queued_packets(&s->nic->nc);
} }
static void static void
@ -926,6 +927,9 @@ set_rdt(E1000State *s, int index, uint32_t val)
{ {
s->check_rxov = 0; s->check_rxov = 0;
s->mac_reg[index] = val & 0xffff; s->mac_reg[index] = val & 0xffff;
if (e1000_has_rxbufs(s, 1)) {
qemu_flush_queued_packets(&s->nic->nc);
}
} }
static void static void