Revert "virtio: add support for configure interrupt"

This reverts commit 081f864f.

Fixes: 081f864f ("virtio: add support for configure interrupt")
Cc: "Cindy Lu" <lulu@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/virtio/virtio.c

@@ -3494,14 +3494,7 @@ static void virtio_queue_guest_notifier_read(EventNotifier *n)
         virtio_irq(vq);
     }
 }
-static void virtio_config_guest_notifier_read(EventNotifier *n)
-{
-    VirtIODevice *vdev = container_of(n, VirtIODevice, config_notifier);
 
-    if (event_notifier_test_and_clear(n)) {
-        virtio_notify_config(vdev);
-    }
-}
 void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign,
                                                 bool with_irqfd)
 {
@@ -3518,23 +3511,6 @@ void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign,
     }
 }
 
-void virtio_config_set_guest_notifier_fd_handler(VirtIODevice *vdev,
-                                                 bool assign, bool with_irqfd)
-{
-    EventNotifier *n;
-    n = &vdev->config_notifier;
-    if (assign && !with_irqfd) {
-        event_notifier_set_handler(n, virtio_config_guest_notifier_read);
-    } else {
-        event_notifier_set_handler(n, NULL);
-    }
-    if (!assign) {
-        /* Test and clear notifier before closing it,*/
-        /* in case poll callback didn't have time to run. */
-        virtio_config_guest_notifier_read(n);
-    }
-}
-
 EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq)
 {
     return &vq->guest_notifier;
@@ -3608,11 +3584,6 @@ EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq)
     return &vq->host_notifier;
 }
 
-EventNotifier *virtio_config_get_guest_notifier(VirtIODevice *vdev)
-{
-    return &vdev->config_notifier;
-}
-
 void virtio_queue_set_host_notifier_enabled(VirtQueue *vq, bool enabled)
 {
     vq->host_notifier_enabled = enabled;

include/hw/virtio/virtio.h

@@ -111,7 +111,6 @@ struct VirtIODevice
     bool use_guest_notifier_mask;
     AddressSpace *dma_as;
     QLIST_HEAD(, VirtQueue) *vector_queues;
-    EventNotifier config_notifier;
 };
 
 struct VirtioDeviceClass {
@@ -314,14 +313,11 @@ uint16_t virtio_get_queue_index(VirtQueue *vq);
 EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq);
 void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign,
                                                 bool with_irqfd);
-void virtio_config_set_guest_notifier_fd_handler(VirtIODevice *vdev,
-                                                 bool assign, bool with_irqfd);
 int virtio_device_start_ioeventfd(VirtIODevice *vdev);
 int virtio_device_grab_ioeventfd(VirtIODevice *vdev);
 void virtio_device_release_ioeventfd(VirtIODevice *vdev);
 bool virtio_device_ioeventfd_enabled(VirtIODevice *vdev);
 EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq);
-EventNotifier *virtio_config_get_guest_notifier(VirtIODevice *vdev);
 void virtio_queue_set_host_notifier_enabled(VirtQueue *vq, bool enabled);
 void virtio_queue_host_notifier_read(EventNotifier *n);
 void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx,