[PATCH 22/35] drm/amd/display: Clear dc_sink after it gets released

[Bhawanpreet Lakha]

From: "Jerry (Fangzhi) Zuo" <Jerry.Zuo at amd.com>

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

[How]
Clear it.

Change-Id: Ifc8d72f51b5c6600d63b88f3011aef8ffc957e66
Signed-off-by: Jerry (Fangzhi) Zuo <Jerry.Zuo at amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas at amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha at amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

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;
-- 
2.17.1