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Date:	Mon, 21 Apr 2014 23:11:01 +0800
From:	Amos Kong <>
Subject: [PATCH] virtio_net: return error when there is no virtqueue or MQ isn't support

Currently ethtool returns zero if there is no virtqueue or MQ isn't
support, we should return -ENOTSUPP to notice user.

Signed-off-by: Amos Kong <>
 drivers/net/virtio_net.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 8a852b5..eaf8266 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1053,7 +1053,7 @@ static int virtnet_set_queues(struct virtnet_info *vi, u16 queue_pairs)
 	struct net_device *dev = vi->dev;
 	if (!vi->has_cvq || !virtio_has_feature(vi->vdev, VIRTIO_NET_F_MQ))
-		return 0;
+		return -ENOTSUPP;
 	s.virtqueue_pairs = queue_pairs;
 	sg_init_one(&sg, &s, sizeof(s));

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