tun: return NET_XMIT_DROP for dropped packets

After commit 5d097109257c03a71845729f8db6b5770c4bbedc
("tun: only queue packets on device"), NETDEV_TX_OK was returned for
dropped packets. This will confuse pktgen since dropped packets were
counted as sent ones.

Fixing this by returning NET_XMIT_DROP to let pktgen count it as error
packet.

Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index e3fa65a4d96c..ac53a7316ecd 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -819,7 +819,7 @@ drop:
         skb_tx_error(skb);
         kfree_skb(skb);
         rcu_read_unlock();
-        return NETDEV_TX_OK;
+        return NET_XMIT_DROP;
 }
 
 static void tun_net_mclist(struct net_device *dev)