virtio-net: fix race between ndo_open() and virtio_device_ready()
We currently call virtio_device_ready() after netdev registration. Since ndo_open() can be called immediately after register_netdev, this means there exists a race between ndo_open() and virtio_device_ready(): the driver may start to use the device before DRIVER_OK which violates the spec. Fix this by switching to use register_netdevice() and protect the virtio_device_ready() with rtnl_lock() to make sure ndo_open() can only be called after virtio_device_ready(). Fixes: 4baf1e33 ("virtio_net: enable VQs early") Signed-off-by:Jason Wang <jasowang@redhat.com> Message-Id: <20220617072949.30734-1-jasowang@redhat.com> Signed-off-by:
Michael S. Tsirkin <mst@redhat.com>
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c346dae4