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virtio-net: correctly transmit XDP buff after linearizing 

We should not go for the error path after successfully transmitting a
XDP buffer after linearizing. Since the error path may try to pop and
drop next packet and increase the drop counters. Fixing this by simply
drop the refcnt of original page and go for xmit path.

Fixes: 72979a6c35 ("virtio_net: xdp, add slowpath case for non contiguous buffers")
Cc: John Fastabend <john.fastabend@gmail.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Jason Wang 2018-05-22 11:44:29 +08:00 committed by David S. Miller
parent 6890418bbb
commit 5d458a13dd
1 changed files with 1 additions and 1 deletions
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2
drivers/net/virtio_net.c
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@ -775,7 +775,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
}
*xdp_xmit = true;
if (unlikely(xdp_page != page))
goto err_xdp;
put_page(page);
rcu_read_unlock();
goto xdp_xmit;
case XDP_REDIRECT: