[PATCH] virtio_net: Enable MSI-X vector for ctrl queue
From: Keiichi Watanabe <hidden>
Date: 2021-06-18 07:26:37
Also in:
lkml
Subsystem:
networking drivers, the rest, virtio net driver · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, "Michael S. Tsirkin", Jason Wang
When we use vhost-user backend on the host, MSI-X vector should be set so that the vmm can get an irq FD and send it to the backend device process with vhost-user protocol. Since whether the vector is set for a queue is determined depending on the queue has a callback, this commit sets an empty callback for virtio-net's control queue. Signed-off-by: Keiichi Watanabe <redacted> --- drivers/net/virtio_net.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 11f722460513..002e3695d4b3 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c@@ -2696,6 +2696,11 @@ static void virtnet_del_vqs(struct virtnet_info *vi) virtnet_free_queues(vi); } +static void virtnet_ctrlq_done(struct virtqueue *rvq) +{ + /* Do nothing */ +} + /* How large should a single buffer be so a queue full of these can fit at * least one full packet? * Logic below assumes the mergeable buffer header is used.
@@ -2748,7 +2753,7 @@ static int virtnet_find_vqs(struct virtnet_info *vi) /* Parameters for control virtqueue, if any */ if (vi->has_cvq) { - callbacks[total_vqs - 1] = NULL; + callbacks[total_vqs - 1] = virtnet_ctrlq_done; names[total_vqs - 1] = "control"; }
--
2.32.0.288.g62a8d224e6-goog