[PATCH 13/34] drm/amd/display: add a NULL pointer check

From: Charlene Liu <[email protected]>

[why]
a fix for a memory crash stress test

Reviewed-by: Chris Park <[email protected]>
Signed-off-by: Charlene Liu <[email protected]>
Signed-off-by: Tom Chung <[email protected]>
---
 .../drm/amd/display/dc/dio/dcn10/dcn10_link_encoder.c  | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dio/dcn10/dcn10_link_encoder.c b/drivers/gpu/drm/amd/display/dc/dio/dcn10/dcn10_link_encoder.c
index 00e82d627d91..aee9a363e336 100644
--- a/drivers/gpu/drm/amd/display/dc/dio/dcn10/dcn10_link_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dio/dcn10/dcn10_link_encoder.c
@@ -1166,6 +1166,10 @@ void dcn10_link_encoder_dp_set_phy_pattern(
 {
 	struct dcn10_link_encoder *enc10 = TO_DCN10_LINK_ENC(enc);
 
+	if (!param) {
+		ASSERT_CRITICAL(false);
+		return;
+	}
 	switch (param->dp_phy_pattern) {
 	case DP_TEST_PATTERN_TRAINING_PATTERN1:
 		dcn10_link_encoder_set_dp_phy_pattern_training_pattern(enc, 0);
@@ -1189,8 +1193,7 @@ void dcn10_link_encoder_dp_set_phy_pattern(
 		set_dp_phy_pattern_prbs7(enc10);
 		break;
 	case DP_TEST_PATTERN_80BIT_CUSTOM:
-		if (param)
-			set_dp_phy_pattern_80bit_custom(
+		set_dp_phy_pattern_80bit_custom(
 				enc10, param->custom_pattern);
 		break;
 	case DP_TEST_PATTERN_CP2520_1:
@@ -1203,8 +1206,7 @@ void dcn10_link_encoder_dp_set_phy_pattern(
 		set_dp_phy_pattern_hbr2_compliance_cp2520_2(enc10, 3);
 		break;
 	case DP_TEST_PATTERN_VIDEO_MODE: {
-		if (param)
-			set_dp_phy_pattern_passthrough_mode(
+		set_dp_phy_pattern_passthrough_mode(
 				enc10, param->dp_panel_mode);
 		break;
 	}
-- 
2.43.0