From: Dmitry Fleytman <dmitry@daynix.com>
Date: Thu, 15 Sep 2016 06:14:29 +0000 (+0300)
Subject: e1000e: Fix spurious RX TCP ACK interrupts
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=4100c026b69001f774bfff30b5773a2418306f8c;p=qemu.git

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 d26b611ab9..02981364a3 100644
--- 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;
         }