drm/i915: Add a live dmabuf selftest

Though we have good coverage of our dmabuf interface through the mock
tests, we also want to check the heavy module unload paths of the live
i915 driver.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213171558.20942-26-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/selftests/i915_gem_dmabuf.c

@@ -292,3 +292,12 @@ int i915_gem_dmabuf_mock_selftests(void)
 	drm_dev_unref(&i915->drm);
 	return err;
 }
+
+int i915_gem_dmabuf_live_selftests(struct drm_i915_private *i915)
+{
+	static const struct i915_subtest tests[] = {
+		SUBTEST(igt_dmabuf_export),
+	};
+
+	return i915_subtests(tests, i915);
+}

drivers/gpu/drm/i915/selftests/i915_live_selftests.h

@@ -12,4 +12,5 @@ selftest(sanitycheck, i915_live_sanitycheck) /* keep first (igt selfcheck) */
 selftest(uncore, intel_uncore_live_selftests)
 selftest(requests, i915_gem_request_live_selftests)
 selftest(objects, i915_gem_object_live_selftests)
+selftest(dmabuf, i915_gem_dmabuf_live_selftests)
 selftest(coherency, i915_gem_coherency_live_selftests)