The checks are misleading and not required [1].

[1] https://lkml.org/lkml/2018/3/19/1792

Addresses-Coverity-ID: 1466017
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NGustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NZhi Wang <zhi.a.wang@intel.com>