vdpa_sim: set vringh notify callback
Instead of calling the vq callback directly, we can leverage the vringh_notify() function, adding vdpasim_vq_notify() and setting it in the vringh notify callback. Suggested-by: Jason Wang <jasowang@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Link: https://lore.kernel.org/r/20201215144256.155342-15-sgarzare@redhat.comSigned-off-by: Michael S. Tsirkin <mst@redhat.com>
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