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| author |   Heng Qi <hengqi@linux.alibaba.com> | 2024-08-01 21:23:37 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2024-08-05 11:10:22 +0100 |
| commit | b50f2af9fbc5c00103ca8b72752b15310bd77762 (patch) | |
| tree | 6c639c7fef7cfa19d92767a94cb9cc2fb5b81e2a | |
| parent | net/tcp: Disable TCP-AO static key after RCU grace period (diff) | |
| download | wireguard-linux-b50f2af9fbc5c00103ca8b72752b15310bd77762.tar.xz wireguard-linux-b50f2af9fbc5c00103ca8b72752b15310bd77762.zip | |
virtio-net: check feature before configuring the vq coalescing command
Virtio spec says:
The driver MUST have negotiated the VIRTIO_NET_F_VQ_NOTF_COAL
feature when issuing commands VIRTIO_NET_CTRL_NOTF_COAL_VQ_SET
and VIRTIO_NET_CTRL_NOTF_COAL_VQ_GET.
So we add the feature negotiation check to
virtnet_send_{r,t}x_ctrl_coal_vq_cmd as a basis for the next bugfix patch.
Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Heng Qi <hengqi@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/virtio_net.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 0383a3e136d6..b1176be8fcfd 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -3658,6 +3658,9 @@ static int virtnet_send_rx_ctrl_coal_vq_cmd(struct virtnet_info *vi, { int err; + if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_VQ_NOTF_COAL)) + return -EOPNOTSUPP; + err = virtnet_send_ctrl_coal_vq_cmd(vi, rxq2vq(queue), max_usecs, max_packets); if (err) @@ -3675,6 +3678,9 @@ static int virtnet_send_tx_ctrl_coal_vq_cmd(struct virtnet_info *vi, { int err; + if (!virtio_has_feature(vi->vdev, VIRTIO_NET_F_VQ_NOTF_COAL)) + return -EOPNOTSUPP; + err = virtnet_send_ctrl_coal_vq_cmd(vi, txq2vq(queue), max_usecs, max_packets); if (err) |