[PATCH v2 5/6] virtio: use ->handle_output() instead of ->handle_aio_output()

[Stefan Hajnoczi]

The difference between ->handle_output() and ->handle_aio_output() was
that ->handle_aio_output() returned a bool return value indicating
progress. This was needed by the old polling API but now that the bool
return value is gone, the two functions can be unified.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 hw/virtio/virtio.c | 33 +++------------------------------
 1 file changed, 3 insertions(+), 30 deletions(-)

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index c042be3935..a97a406d3c 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -125,7 +125,6 @@ struct VirtQueue
 
     uint16_t vector;
     VirtIOHandleOutput handle_output;
-    VirtIOHandleOutput handle_aio_output;
     VirtIODevice *vdev;
     EventNotifier guest_notifier;
     EventNotifier host_notifier;
@@ -2300,20 +2299,6 @@ void virtio_queue_set_align(VirtIODevice *vdev, int n, 
int align)
     }
 }
 
-static void virtio_queue_notify_aio_vq(VirtQueue *vq)
-{
-    if (vq->vring.desc && vq->handle_aio_output) {
-        VirtIODevice *vdev = vq->vdev;
-
-        trace_virtio_queue_notify(vdev, vq - vdev->vq, vq);
-        vq->handle_aio_output(vdev, vq);
-
-        if (unlikely(vdev->start_on_kick)) {
-            virtio_set_started(vdev, true);
-        }
-    }
-}
-
 static void virtio_queue_notify_vq(VirtQueue *vq)
 {
     if (vq->vring.desc && vq->handle_output) {
@@ -2392,7 +2377,6 @@ VirtQueue *virtio_add_queue(VirtIODevice *vdev, int 
queue_size,
     vdev->vq[i].vring.num_default = queue_size;
     vdev->vq[i].vring.align = VIRTIO_PCI_VRING_ALIGN;
     vdev->vq[i].handle_output = handle_output;
-    vdev->vq[i].handle_aio_output = NULL;
     vdev->vq[i].used_elems = g_malloc0(sizeof(VirtQueueElement) *
                                        queue_size);
 
@@ -2404,7 +2388,6 @@ void virtio_delete_queue(VirtQueue *vq)
     vq->vring.num = 0;
     vq->vring.num_default = 0;
     vq->handle_output = NULL;
-    vq->handle_aio_output = NULL;
     g_free(vq->used_elems);
     vq->used_elems = NULL;
     virtio_virtqueue_reset_region_cache(vq);
@@ -3509,14 +3492,6 @@ EventNotifier *virtio_queue_get_guest_notifier(VirtQueue 
*vq)
     return &vq->guest_notifier;
 }
 
-static void virtio_queue_host_notifier_aio_read(EventNotifier *n)
-{
-    VirtQueue *vq = container_of(n, VirtQueue, host_notifier);
-    if (event_notifier_test_and_clear(n)) {
-        virtio_queue_notify_aio_vq(vq);
-    }
-}
-
 static void virtio_queue_host_notifier_aio_poll_begin(EventNotifier *n)
 {
     VirtQueue *vq = container_of(n, VirtQueue, host_notifier);
@@ -3536,7 +3511,7 @@ static void 
virtio_queue_host_notifier_aio_poll_ready(EventNotifier *n)
 {
     VirtQueue *vq = container_of(n, VirtQueue, host_notifier);
 
-    virtio_queue_notify_aio_vq(vq);
+    virtio_queue_notify_vq(vq);
 }
 
 static void virtio_queue_host_notifier_aio_poll_end(EventNotifier *n)
@@ -3551,9 +3526,8 @@ void virtio_queue_aio_set_host_notifier_handler(VirtQueue 
*vq, AioContext *ctx,
         VirtIOHandleOutput handle_output)
 {
     if (handle_output) {
-        vq->handle_aio_output = handle_output;
         aio_set_event_notifier(ctx, &vq->host_notifier, true,
-                               virtio_queue_host_notifier_aio_read,
+                               virtio_queue_host_notifier_read,
                                virtio_queue_host_notifier_aio_poll,
                                virtio_queue_host_notifier_aio_poll_ready);
         aio_set_event_notifier_poll(ctx, &vq->host_notifier,
@@ -3563,8 +3537,7 @@ void virtio_queue_aio_set_host_notifier_handler(VirtQueue 
*vq, AioContext *ctx,
         aio_set_event_notifier(ctx, &vq->host_notifier, true, NULL, NULL, 
NULL);
         /* Test and clear notifier before after disabling event,
          * in case poll callback didn't have time to run. */
-        virtio_queue_host_notifier_aio_read(&vq->host_notifier);
-        vq->handle_aio_output = NULL;
+        virtio_queue_host_notifier_read(&vq->host_notifier);
     }
 }
 
-- 
2.33.1