Since xsk's TX queue is consumed by TX NAPI, if sq is bound to xsk, then we must stop tx napi from being disabled.
Signed-off-by: Xuan Zhuo <xuanz...@linux.alibaba.com> Acked-by: Jason Wang <jasow...@redhat.com> --- drivers/net/virtio/main.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/net/virtio/main.c b/drivers/net/virtio/main.c index 3856006ac1c7..98721c7b3377 100644 --- a/drivers/net/virtio/main.c +++ b/drivers/net/virtio/main.c @@ -3475,7 +3475,7 @@ static int virtnet_set_coalesce(struct net_device *dev, struct netlink_ext_ack *extack) { struct virtnet_info *vi = netdev_priv(dev); - int ret, queue_number, napi_weight; + int ret, queue_number, napi_weight, i; bool update_napi = false; /* Can't change NAPI weight if the link is up */ @@ -3504,6 +3504,14 @@ static int virtnet_set_coalesce(struct net_device *dev, return ret; if (update_napi) { + /* xsk xmit depends on the tx napi. So if xsk is active, + * prevent modifications to tx napi. + */ + for (i = queue_number; i < vi->max_queue_pairs; i++) { + if (vi->sq[i].xsk.pool) + return -EBUSY; + } + for (; queue_number < vi->max_queue_pairs; queue_number++) vi->sq[queue_number].napi.weight = napi_weight; } -- 2.32.0.3.g01195cf9f