e1000e: Fix spurious RX TCP ACK interrupts

Do not raise ACK interrupts when
RFCTL.ACKDIS bit is set (see spec. 10.2.5.16).

Signed-off-by: Dmitry Fleytman <dmitry@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

diff --git a/hw/net/e1000e_core.c b/hw/net/e1000e_core.c
index d26b611ab96795a6c824131b351fa963ddbda013..02981364a3bfed4df8eacbd73c38651923b58743 100644 (file)
--- a/hw/net/e1000e_core.c
+++ b/hw/net/e1000e_core.c
@@ -1710,7 +1710,8 @@ e1000e_receive_iov(E1000ECore *core, const struct iovec *iov, int iovcnt)
         }
 
         /* Perform ACK receive detection */
-        if (e1000e_is_tcp_ack(core, core->rx_pkt)) {
+        if  (!(core->mac[RFCTL] & E1000_RFCTL_ACK_DIS) &&
+             (e1000e_is_tcp_ack(core, core->rx_pkt))) {
             n |= E1000_ICS_ACK;
         }