virtio-net: Keep stop() to follow mirror sequence of open()

Cited commit in fixes tag frees rxq xdp info while RQ NAPI is
still enabled and packet processing may be ongoing.

Follow the mirror sequence of open() in the stop() callback.
This ensures that when rxq info is unregistered, no rx
packet processing is ongoing.

Fixes: 754b8a21a96d ("virtio_net: setup xdp_rxq_info")
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Parav Pandit <parav@nvidia.com>
Link: https://lore.kernel.org/r/20230202163516.12559-1-parav@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 6df14dd..61e33e4 100644 (file)
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2158,8 +2158,8 @@ static int virtnet_close(struct net_device *dev)
        cancel_delayed_work_sync(&vi->refill);
 
        for (i = 0; i < vi->max_queue_pairs; i++) {
-               xdp_rxq_info_unreg(&vi->rq[i].xdp_rxq);
                napi_disable(&vi->rq[i].napi);
+               xdp_rxq_info_unreg(&vi->rq[i].xdp_rxq);
                virtnet_napi_tx_disable(&vi->sq[i].napi);
        }