From: Reza Amini <reza.amini@amd.com>
Date: Fri, 3 Feb 2017 14:19:41 -0500
Subject: drm/amd/display: handle unsupported sink types
Git-commit: 67c3bd40b3b97cac40e01aaef712ccf4af5a48b1
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Signed-off-by: Reza Amini <reza.amini@amd.com>
Reviewed-by: Wesley Chalmers <Wesley.Chalmers@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@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_sink.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/gpu/drm/amd/display/dc/core/dc_sink.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_sink.c
@@ -53,6 +53,10 @@ static bool construct(struct sink *sink,
 
 	struct core_link *core_link = DC_LINK_TO_LINK(init_params->link);
 
+	if (!core_link) {
+		return false;
+	}
+
 	sink->protected.public.sink_signal = init_params->sink_signal;
 	sink->protected.link = core_link;
 	sink->protected.ctx = core_link->ctx;