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-rw-r--r--hw/virtio-serial-bus.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
index 077c3183bc..8e611c03e0 100644
--- a/hw/virtio-serial-bus.c
+++ b/hw/virtio-serial-bus.c
@@ -117,6 +117,7 @@ static void do_flush_queued_data(VirtIOSerialPort *port, VirtQueue *vq,
VirtQueueElement elem;
assert(port || discard);
+ assert(virtio_queue_ready(vq));
while ((discard || !port->throttled) && virtqueue_pop(vq, &elem)) {
uint8_t *buf;