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    Subject[PATCH 5/9] virtio_config: introduce a new ready method
    Date
    Signed-off-by: Jason Wang <jasowang@redhat.com>
    ---
    include/linux/virtio_config.h | 6 ++++++
    1 file changed, 6 insertions(+)

    diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
    index 8519b3ae5d52..f2891c6221a1 100644
    --- a/include/linux/virtio_config.h
    +++ b/include/linux/virtio_config.h
    @@ -23,6 +23,8 @@ struct virtio_shm_region {
    * any of @get/@set, @get_status/@set_status, or @get_features/
    * @finalize_features are NOT safe to be called from an atomic
    * context.
    + * @ready: make the device ready
    + * vdev: the virtio_device
    * @get: read the value of a configuration field
    * vdev: the virtio_device
    * offset: the offset of the configuration field
    @@ -75,6 +77,7 @@ struct virtio_shm_region {
    */
    typedef void vq_callback_t(struct virtqueue *);
    struct virtio_config_ops {
    + void (*ready)(struct virtio_device *vdev);
    void (*get)(struct virtio_device *vdev, unsigned offset,
    void *buf, unsigned len);
    void (*set)(struct virtio_device *vdev, unsigned offset,
    @@ -229,6 +232,9 @@ void virtio_device_ready(struct virtio_device *dev)
    {
    unsigned status = dev->config->get_status(dev);

    + if (dev->config->ready)
    + dev->config->ready(dev);
    +
    BUG_ON(status & VIRTIO_CONFIG_S_DRIVER_OK);
    dev->config->set_status(dev, status | VIRTIO_CONFIG_S_DRIVER_OK);
    }
    --
    2.25.1
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