[Qemu-devel] [PATCH 3/3] scsi/virtio-scsi: Prevent assertion on missed events

[Eric Farman <farman@linux.vnet.ibm.com>]

In some cases, an unplug can cause events to be dropped, which
leads to an assertion failure when preparing to notify the guest
kernel.  This merely accommodates both variations of the "no event"
value that could occur in this codepath.

Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
---
 hw/scsi/virtio-scsi.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 49a9576..f8e3632 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -521,7 +521,8 @@ static void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
     evt->event = event;
     evt->reason = reason;
     if (!dev) {
-        assert(event == VIRTIO_SCSI_T_NO_EVENT);
+        assert(event == VIRTIO_SCSI_T_NO_EVENT ||
+               event == VIRTIO_SCSI_T_EVENTS_MISSED);
     } else {
         evt->lun[0] = 1;
         evt->lun[1] = dev->id;
-- 
1.7.9.5