From ddef02de0d71d483ad4398393717cc0d53fc990a Mon Sep 17 00:00:00 2001
From: Wyatt Wood <wyatt.wood@amd.com>
Date: Wed, 31 Jul 2019 15:52:46 -0400
Subject: drm/amd/display: add null checks before logging
Git-commit: ddef02de0d71d483ad4398393717cc0d53fc990a
Patch-mainline: v5.4-rc1
References: bsc#1152489

Adding NULL checks to various parameters in log_tf, to avoid
nullptr errors

Signed-off-by: Wyatt Wood <wyatt.wood@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Acked-by: Nikola Cornij <Nikola.Cornij@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 .../gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c    | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index f61f59ac1e00..51c4c62b40e1 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -1503,9 +1503,12 @@ dcn10_set_output_transfer_func(struct pipe_ctx *pipe_ctx,
 	} else
 		dpp->funcs->dpp_program_regamma_pwl(dpp, NULL, OPP_REGAMMA_BYPASS);
 
-	log_tf(stream->ctx,
-			stream->out_transfer_func,
-			dpp->regamma_params.hw_points_num);
+	if (stream != NULL && stream->ctx != NULL &&
+			stream->out_transfer_func != NULL) {
+		log_tf(stream->ctx,
+				stream->out_transfer_func,
+				dpp->regamma_params.hw_points_num);
+	}
 
 	return true;
 }
-- 
2.28.0