drm/i915/selftests: Skip all request selftests when wedged

If the GPU is irrecoverably wedge, we cannot submit any request and so
all of the request selftests will expectedly fail. Skip over them.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: NMatthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180706065332.15214-5-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/selftests/i915_request.c

@@ -859,5 +859,9 @@ int i915_request_live_selftests(struct drm_i915_private *i915)
 		SUBTEST(live_sequential_engines),
 		SUBTEST(live_empty_request),
 	};
+
+	if (i915_terminally_wedged(&i915->gpu_error))
+		return 0;
+
 	return i915_subtests(tests, i915);
 }