From: Michael Strauss <michael.strauss@amd.com>
Date: Wed, 13 Jan 2021 21:33:15 +0000 (-0500)
Subject: drm/amd/display: Add null pointer check to is_dig_enabled func
X-Git-Tag: baikal/aarch64/sdk6.1~7223^2~5^2~26
X-Git-Url: https://git.baikalelectronics.ru/sdk/?a=commitdiff_plain;h=462fe9c29293ef3271af5b102f45139c51fcf1eb;p=kernel.git

drm/amd/display: Add null pointer check to is_dig_enabled func

[WHY]
Safeguarding as pointer may be null in diagnostic environment

Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Reviewed-by: Sung Lee <Sung.Lee@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/vg_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/vg_clk_mgr.c
index 991b9c5beaa30..aadb801447a7c 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/vg_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn301/vg_clk_mgr.c
@@ -75,7 +75,8 @@ int vg_get_active_display_cnt_wa(
 		const struct dc_link *link = dc->links[i];
 
 		/* abusing the fact that the dig and phy are coupled to see if the phy is enabled */
-		if (link->link_enc->funcs->is_dig_enabled(link->link_enc))
+		if (link->link_enc->funcs->is_dig_enabled &&
+				link->link_enc->funcs->is_dig_enabled(link->link_enc))
 			display_count++;
 	}