virtio: tools: make it clear that virtqueue_add_buf() no longer returns > 0
We simplified virtqueue_add_buf(), make it clear in the callers.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/tools/virtio/virtio_test.c b/tools/virtio/virtio_test.c
index e626fa5..a11028a 100644
--- a/tools/virtio/virtio_test.c
+++ b/tools/virtio/virtio_test.c
@@ -164,7 +164,7 @@
r = virtqueue_add_buf(vq->vq, &sl, 1, 0,
dev->buf + started,
GFP_ATOMIC);
- if (likely(r >= 0)) {
+ if (likely(r == 0)) {
++started;
virtqueue_kick(vq->vq);
}
@@ -177,7 +177,7 @@
r = 0;
}
- } while (r >= 0);
+ } while (r == 0);
if (completed == completed_before)
++spurious;
assert(completed <= bufs);