if (vq->num_free < out + in) {
pr_debug("Can't add buf len %i - avail = %i\n",
out + in, vq->num_free);
- /* We notify *even if* VRING_USED_F_NO_NOTIFY is set here. */
- vq->notify(&vq->vq);
+ /* FIXME: for historical reasons, we force a notify here if
+ * there are outgoing parts to the buffer. Presumably the
+ * host should service the ring ASAP. */
+ if (out)
+ vq->notify(&vq->vq);
END_USE(vq);
return -ENOSPC;
}