[Qemu-devel] [PATCH] virtio: Register host notifier handler as external

[Fam Zheng]

This ensures the bdrv_drained_begin() in block layer is effective and
fixes launchpad bug #1570134.

Signed-off-by: Fam Zheng <f...@redhat.com>
---
 hw/virtio/virtio.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index f745c4a..002c2c6 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -1829,10 +1829,11 @@ void 
virtio_queue_set_host_notifier_fd_handler(VirtQueue *vq, bool assign,
                                                bool set_handler)
 {
     if (assign && set_handler) {
-        event_notifier_set_handler(&vq->host_notifier,
-                                   virtio_queue_host_notifier_read);
+        aio_set_event_notifier(qemu_get_aio_context(), &vq->host_notifier,
+                               true, virtio_queue_host_notifier_read);
     } else {
-        event_notifier_set_handler(&vq->host_notifier, NULL);
+        aio_set_event_notifier(qemu_get_aio_context(), &vq->host_notifier,
+                               true, NULL);
     }
     if (!assign) {
         /* Test and clear notifier before after disabling event,
-- 
2.8.0