high-latency devices.

Thanks to Hans de Goede for our discussions on this topic.
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Thanks-to: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>