vsock/virtio: add support for device suspend/resume
Implement .freeze and .restore callbacks of struct virtio_driver to support device suspend/resume. During suspension all connected sockets are reset and VQs deleted. During resume the VQs are re-initialized. Reported by: Vilas R K <vilas.r.k@intel.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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