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Diffstat (limited to 'include/linux/virtio_config.h')
-rw-r--r--include/linux/virtio_config.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 8519b3ae5d52..4d107ad31149 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.
+ * @enable_cbs: enable the callbacks
+ * 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 (*enable_cbs)(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->enable_cbs)
+ dev->config->enable_cbs(dev);
+
BUG_ON(status & VIRTIO_CONFIG_S_DRIVER_OK);
dev->config->set_status(dev, status | VIRTIO_CONFIG_S_DRIVER_OK);
}