From: Leon Elazar <leon.elazar@amd.com>
Date: Mon, 10 Apr 2017 09:37:11 -0400
Subject: drm/amd/display: set NULL value during removal for remoteSink
Git-commit: b64875feb18a734739929e2af8a625b186bb6ec0
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

In MST case during removal of remote sink its descriptor pointer wasn't freed corectly.

Signed-off-by: Leon Elazar <leon.elazar@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1787,7 +1787,7 @@ void dc_link_remove_remote_sink(const st
 				dc_link->remote_sinks[i] = dc_link->remote_sinks[i+1];
 				i++;
 			}
-
+			dc_link->remote_sinks[i] = NULL;
 			dc_link->sink_count--;
 			return;
 		}