Revert "block: Merge bio before checking ->cached_rq"
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2188514
Signed-off-by: Ming Lei ming.lei@redhat.com
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2188514
Signed-off-by: Ming Lei ming.lei@redhat.com