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authorRusty Russell <rusty@rustcorp.com.au>2008-02-04 23:49:57 -0500
committerRusty Russell <rusty@rustcorp.com.au>2008-02-04 23:49:58 +1100
commit18445c4d501b9ab4336f66ef46b092661ddaf336 (patch)
tree9d23185f207d912942890cf047d1d3200806b401 /include/linux/virtio.h
parenta586d4f6016f7139d8c26df0e6927131168d3b5b (diff)
virtio: explicit enable_cb/disable_cb rather than callback return.
It seems that virtio_net wants to disable callbacks (interrupts) before calling netif_rx_schedule(), so we can't use the return value to do so. Rename "restart" to "cb_enable" and introduce "cb_disable" hook: callback now returns void, rather than a boolean. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux/virtio.h')
-rw-r--r--include/linux/virtio.h11
1 files changed, 6 insertions, 5 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 14e1379876d..951d81747b4 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -11,15 +11,13 @@
/**
* virtqueue - a queue to register buffers for sending or receiving.
* @callback: the function to call when buffers are consumed (can be NULL).
- * If this returns false, callbacks are suppressed until vq_ops->restart
- * is called.
* @vdev: the virtio device this queue was created for.
* @vq_ops: the operations for this virtqueue (see below).
* @priv: a pointer for the virtqueue implementation to use.
*/
struct virtqueue
{
- bool (*callback)(struct virtqueue *vq);
+ void (*callback)(struct virtqueue *vq);
struct virtio_device *vdev;
struct virtqueue_ops *vq_ops;
void *priv;
@@ -41,7 +39,9 @@ struct virtqueue
* vq: the struct virtqueue we're talking about.
* len: the length written into the buffer
* Returns NULL or the "data" token handed to add_buf.
- * @restart: restart callbacks after callback returned false.
+ * @disable_cb: disable callbacks
+ * vq: the struct virtqueue we're talking about.
+ * @enable_cb: restart callbacks after disable_cb.
* vq: the struct virtqueue we're talking about.
* This returns "false" (and doesn't re-enable) if there are pending
* buffers in the queue, to avoid a race.
@@ -65,7 +65,8 @@ struct virtqueue_ops {
void *(*get_buf)(struct virtqueue *vq, unsigned int *len);
- bool (*restart)(struct virtqueue *vq);
+ void (*disable_cb)(struct virtqueue *vq);
+ bool (*enable_cb)(struct virtqueue *vq);
void (*shutdown)(struct virtqueue *vq);
};