[i-g-t PATCH] tests/gem_wait_render_timeout: make sure the GPU is idle before exiting

[Imre Deak <imre.deak@intel.com>]

Leaving the GPU running after we exit can mess up timing dependent tests
we run afterwards.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=64270

Signed-off-by: Imre Deak <imre.deak@intel.com>
---
 tests/gem_wait_render_timeout.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tests/gem_wait_render_timeout.c b/tests/gem_wait_render_timeout.c
index 14482e3..9ec4e49 100644
--- a/tests/gem_wait_render_timeout.c
+++ b/tests/gem_wait_render_timeout.c
@@ -216,6 +216,11 @@ int main(int argc, char **argv)
 	assert(gem_bo_wait_timeout(fd, dst2->handle, &timeout) == -ETIME);
 	assert(timeout == 0);
 
+	/* Make sure we exit only after the GPU is idle. Apply some fuzz
+	 * to the timeout since the calibrated iteration count can be
+	 * twice the amount the GPU can execute in a second. */
+	timeout = 5 * ENOUGH_WORK_IN_SECONDS * NSEC_PER_SEC;
+	assert(gem_bo_wait_timeout(fd, dst2->handle, &timeout) == 0);
 
 	if (do_signals)
 		drmtest_stop_signal_helper();
-- 
1.8.1.2