This is a note to let you know that I've just added the patch titled
virtio-net: Keep stop() to follow mirror sequence of open()
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
virtio-net-keep-stop-to-follow-mirror-sequence-of-op.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 094e8f9f102291ad493f95810f9d1c4fce645713
Author: Parav Pandit <parav@xxxxxxxxxx>
Date: Thu Feb 2 18:35:16 2023 +0200
virtio-net: Keep stop() to follow mirror sequence of open()
[ 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@xxxxxxxxxx>
Reviewed-by: Jiri Pirko <jiri@xxxxxxxxxx>
Signed-off-by: Parav Pandit <parav@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230202163516.12559-1-parav@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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);
}
