drm/i915/selftests: Use GT engines in igt_live_test

Frees up two call sites from passing i915 to for_each_engine.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191022094726.3001-11-tvrtko.ursulin@linux.intel.com

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

@@ -16,6 +16,7 @@ int igt_live_test_begin(struct igt_live_test *t,
 			const char *func,
 			const char *name)
 {
+	struct intel_gt *gt = &i915->gt;
 	struct intel_engine_cs *engine;
 	enum intel_engine_id id;
 	int err;
@@ -24,7 +25,7 @@ int igt_live_test_begin(struct igt_live_test *t,
 	t->func = func;
 	t->name = name;
 
-	err = intel_gt_wait_for_idle(&i915->gt, MAX_SCHEDULE_TIMEOUT);
+	err = intel_gt_wait_for_idle(gt, MAX_SCHEDULE_TIMEOUT);
 	if (err) {
 		pr_err("%s(%s): failed to idle before, with err=%d!",
 		       func, name, err);
@@ -33,7 +34,7 @@ int igt_live_test_begin(struct igt_live_test *t,
 
 	t->reset_global = i915_reset_count(&i915->gpu_error);
 
-	for_each_engine(engine, i915, id)
+	for_each_engine(engine, gt, id)
 		t->reset_engine[id] =
 			i915_reset_engine_count(&i915->gpu_error, engine);
 
@@ -56,7 +57,7 @@ int igt_live_test_end(struct igt_live_test *t)
 		return -EIO;
 	}
 
-	for_each_engine(engine, i915, id) {
+	for_each_engine(engine, &i915->gt, id) {
 		if (t->reset_engine[id] ==
 		    i915_reset_engine_count(&i915->gpu_error, engine))
 			continue;