From: Parav Pandit parav@nvidia.com
[ Upstream commit 63b114042d8a9c02d9939889177c36dbdb17a588 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/virtio_net.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 579df7c5411d..5212d9cb0372 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -1910,8 +1910,8 @@ 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); }