From: Jerry (Fangzhi) Zuo <Jerry.Zuo@amd.com>
Date: Thu, 24 Jan 2019 16:46:49 +0000 (-0500)
Subject: drm/amd/display: Clear dc_sink after it gets released
X-Git-Tag: v5.1-rc1~117^2~10^2~17
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=3f01f098a4e2ef30ef628497c43a3d568e720376;p=linux.git

drm/amd/display: Clear dc_sink after it gets released

[Why]
The dc_sink was released but the pointer on the aconnector was
not cleared.

[How]
Clear it.

Signed-off-by: Jerry (Fangzhi) Zuo <Jerry.Zuo@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 73f8e8fa6edb..44c1a02e6452 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -173,8 +173,10 @@ static int dm_dp_mst_get_modes(struct drm_connector *connector)
 		aconnector->edid = edid;
 	}
 
-	if (aconnector->dc_sink && aconnector->dc_sink->sink_signal == SIGNAL_TYPE_VIRTUAL)
+	if (aconnector->dc_sink && aconnector->dc_sink->sink_signal == SIGNAL_TYPE_VIRTUAL) {
 		dc_sink_release(aconnector->dc_sink);
+		aconnector->dc_sink = NULL;
+	}
 
 	if (!aconnector->dc_sink) {
 		struct dc_sink *dc_sink;