Fix the inverted test to emit the wait on the end of the previous request if we /haven't/ already. Fixes:6a79d84840("drm/i915: Lock signaler timeline while navigating") Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> Cc: <stable@vger.kernel.org> # v5.5+ Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200305104210.2619967-1-chris@chris-wilson.co.uk (cherry picked from commit07e9c59d63) Signed-off-by: Jani Nikula <jani.nikula@intel.com>