[Intel-gfx] [PATCH i-g-t] tests/kms_dp_dsc: Avoid SIGSEGV when release DRM connector.

[Lee Shawn C]

Got SIGSEGV fault while running kms_dp_dsc test but did not
connect DP DSC capable monitor on eDP/DP port. This test daemon
should "SKIP" test without any problem. We found kms_dp_dsc
can't get proper drmModeConnector and caused this SIGSEGV fault
when release it. Make sure drmModeConnector is available before
free it can avoid this issue.

Signed-off-by: Lee Shawn C <shawn.c.lee at intel.com>
---
 tests/kms_dp_dsc.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tests/kms_dp_dsc.c b/tests/kms_dp_dsc.c
index 2446fd82bba3..ea7c9f4f72ce 100644
--- a/tests/kms_dp_dsc.c
+++ b/tests/kms_dp_dsc.c
@@ -262,7 +262,7 @@ igt_main
 	data_t data = {};
 	igt_output_t *output;
 	drmModeRes *res;
-	drmModeConnector *connector;
+	drmModeConnector *connector = NULL;
 	int i, test_conn_cnt, test_cnt;
 	int tests[] = {DRM_MODE_CONNECTOR_eDP, DRM_MODE_CONNECTOR_DisplayPort};
 
@@ -311,7 +311,8 @@ igt_main
 	}
 
 	igt_fixture {
-		drmModeFreeConnector(connector);
+		if (connector)
+			drmModeFreeConnector(connector);
 		drmModeFreeResources(res);
 		close(data.debugfs_fd);
 		close(data.drm_fd);
-- 
2.17.1