[Qemu-devel] [PATCH RFC] vhost: fix vhost force with msix=off

["Michael S. Tsirkin" <mst@redhat.com>]

In response to a bug report on IRC: this should fix it I think?
Need to test properly but out of time for today,
compiled only. Hope this helps.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index 8bba0f3..d0fcc6c 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -758,6 +758,10 @@ static int virtio_pci_set_guest_notifier(DeviceState *d, int n, bool assign,
         event_notifier_cleanup(notifier);
     }
 
+    if (!msix_enabled(&proxy->pci_dev) && proxy->vdev->guest_notifier_mask) {
+        proxy->vdev->guest_notifier_mask(proxy->vdev, n, !assign);
+    }
+
     return 0;
 }