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

stable inclusion
from stable-v5.10.168
commit 4fb430c6987817b5992e04b417755c339f72f8fe
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7URR4

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=4fb430c6987817b5992e04b417755c339f72f8fe

----------------------------------------------------

[ Upstream commit 63b11404 ]

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: 754b8a21 ("virtio_net: setup xdp_rxq_info")
Acked-by: NMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: NJiri Pirko <jiri@nvidia.com>
Signed-off-by: NParav Pandit <parav@nvidia.com>
Link: https://lore.kernel.org/r/20230202163516.12559-1-parav@nvidia.comSigned-off-by: NJakub Kicinski <kuba@kernel.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: Nzhaoxiaoqiang11 <zhaoxiaoqiang11@jd.com>

drivers/net/virtio_net.c

@@ -1928,8 +1928,8 @@ 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);
 	}