There is no need to tell users when eq->cons_index is overflow, we
just set it back to zero.
Signed-off-by: Weihang Li <liweihang@hisilicon.com>
Link: https://lore.kernel.org/r/1565276034-97329-13-git-send-email-oulijun@huawei.comSigned-off-by: Doug Ledford <dledford@redhat.com>