From: Jason Wang jasowang@redhat.com
commit 25266128fe16d5632d43ada34c847d7b8daba539 upstream.
A race were found where set_channels could be called after registering but before virtnet_set_queues() in virtnet_probe(). Fixing this by moving the virtnet_set_queues() before netdevice registering. While at it, use _virtnet_set_queues() to avoid holding rtnl as the device is not even registered at that time.
Cc: stable@vger.kernel.org Fixes: a220871be66f ("virtio-net: correctly enable multiqueue") Signed-off-by: Jason Wang jasowang@redhat.com Acked-by: Michael S. Tsirkin mst@redhat.com Reviewed-by: Xuan Zhuo xuanzhuo@linux.alibaba.com Link: https://lore.kernel.org/r/20230725072049.617289-1-jasowang@redhat.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/virtio_net.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -4110,6 +4110,8 @@ static int virtnet_probe(struct virtio_d if (vi->has_rss || vi->has_rss_hash_report) virtnet_init_default_rss(vi);
+ _virtnet_set_queues(vi, vi->curr_queue_pairs); + /* serialize netdev register + virtio_device_ready() with ndo_open() */ rtnl_lock();
@@ -4148,8 +4150,6 @@ static int virtnet_probe(struct virtio_d goto free_unregister_netdev; }
- virtnet_set_queues(vi, vi->curr_queue_pairs); - /* Assume link up if device can't report link status, otherwise get link status from config. */ netif_carrier_off(dev);