tegra-dc: Check ptr against NULL before access.

This fix coverity issue: 2907007

Bug 200741055

Change-Id: Ib79759e5b2dc83bdf77e659a30a0d9f891e2a899
Signed-off-by: Achal Verma <achalv@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2528297
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Dmitry Pervushin <dpervushin@nvidia.com>
Reviewed-by: Rahul Jain (SW-TEGRA) <rahuljain@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvidia/+/2575322
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Phoenix Jung <pjung@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/video/tegra/dc/of_dc.c b/drivers/video/tegra/dc/of_dc.c
index a90538156..de8acdc02 100644
--- a/drivers/video/tegra/dc/of_dc.c
+++ b/drivers/video/tegra/dc/of_dc.c
@@ -1,7 +1,7 @@
 /*
  * of_dc.c: tegra dc of interface.
  *
- * Copyright (c) 2013-2019, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2013-2021, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -2865,7 +2865,7 @@ struct tegra_dc_platform_data *of_dc_parse_platform_data(
                 case TEGRA_DC_OUT_FAKE_DP:
                 case TEGRA_DC_OUT_HDMI:
                 case TEGRA_DC_OUT_DP:
-                        if (dc->current_topology.conn_inst == 0) {
+                        if (dc && dc->current_topology.conn_inst == 0) {
                                 pdata->conn_np =
                                         of_find_node_by_path("/host1x/sor");
                         } else {