diff options
| author | Andy Lutomirski <luto@kernel.org> | 2016-07-18 15:34:49 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-07-19 19:25:43 -0700 |
| commit | a725ee3e44e39dab1ec82cc745899a785d2a555e (patch) | |
| tree | f45259819d69effb4f765007173e92bbac4520f4 /drivers/net | |
| parent | cbce91cad4ee39070bf3c7873767194e4be88e16 (diff) | |
| download | lwn-a725ee3e44e39dab1ec82cc745899a785d2a555e.tar.gz lwn-a725ee3e44e39dab1ec82cc745899a785d2a555e.zip | |
virtio-net: Remove more stack DMA
VLAN and MQ control was doing DMA from the stack. Fix it.
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/virtio_net.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 1dd08d4b9c31..1b5f531eeb25 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -144,8 +144,10 @@ struct virtnet_info { /* Control VQ buffers: protected by the rtnl lock */ struct virtio_net_ctrl_hdr ctrl_hdr; virtio_net_ctrl_ack ctrl_status; + struct virtio_net_ctrl_mq ctrl_mq; u8 ctrl_promisc; u8 ctrl_allmulti; + u16 ctrl_vid; /* Ethtool settings */ u8 duplex; @@ -1058,14 +1060,13 @@ static void virtnet_ack_link_announce(struct virtnet_info *vi) static int virtnet_set_queues(struct virtnet_info *vi, u16 queue_pairs) { struct scatterlist sg; - struct virtio_net_ctrl_mq s; struct net_device *dev = vi->dev; if (!vi->has_cvq || !virtio_has_feature(vi->vdev, VIRTIO_NET_F_MQ)) return 0; - s.virtqueue_pairs = cpu_to_virtio16(vi->vdev, queue_pairs); - sg_init_one(&sg, &s, sizeof(s)); + vi->ctrl_mq.virtqueue_pairs = cpu_to_virtio16(vi->vdev, queue_pairs); + sg_init_one(&sg, &vi->ctrl_mq, sizeof(vi->ctrl_mq)); if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MQ, VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET, &sg)) { @@ -1172,7 +1173,8 @@ static int virtnet_vlan_rx_add_vid(struct net_device *dev, struct virtnet_info *vi = netdev_priv(dev); struct scatterlist sg; - sg_init_one(&sg, &vid, sizeof(vid)); + vi->ctrl_vid = vid; + sg_init_one(&sg, &vi->ctrl_vid, sizeof(vi->ctrl_vid)); if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN, VIRTIO_NET_CTRL_VLAN_ADD, &sg)) @@ -1186,7 +1188,8 @@ static int virtnet_vlan_rx_kill_vid(struct net_device *dev, struct virtnet_info *vi = netdev_priv(dev); struct scatterlist sg; - sg_init_one(&sg, &vid, sizeof(vid)); + vi->ctrl_vid = vid; + sg_init_one(&sg, &vi->ctrl_vid, sizeof(vi->ctrl_vid)); if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_VLAN, VIRTIO_NET_CTRL_VLAN_DEL, &sg)) |