virtio: record the maximum queue num supported by the device.

[linux-2.6-microblaze.git] / include / linux / virtio.h

diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index d8fdf17..129bde7 100644 (file)
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -19,6 +19,7 @@
  * @priv: a pointer for the virtqueue implementation to use.
  * @index: the zero-based ordinal number for this queue.
  * @num_free: number of elements we expect to be able to fit.
+ * @num_max: the maximum number of elements supported by the device.
  *
  * A note on @num_free: with indirect buffers, each buffer needs one
  * element in the queue, otherwise a buffer will need one element per
@@ -31,6 +32,7 @@ struct virtqueue {
        struct virtio_device *vdev;
        unsigned int index;
        unsigned int num_free;
+       unsigned int num_max;
        void *priv;
 };