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drm/amd/dc: Fix a missing check bug in dm_dp_mst_detect()

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[ Upstream commit 655c0ed19772d92c9665ed08bdc5202acc096dda ]

In dm_dp_mst_detect(), We should check whether or not @connector
has been unregistered from userspace. If the connector is unregistered,
we should return disconnected status.

Fixes: 4562236b3bc0 ("drm/amd/dc: Add dc display driver (v2)")
Signed-off-by: Yingjie Wang <wangyingjie55@126.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yingjie Wang 2021-04-08 17:57:20 -07:00 committed by Greg Kroah-Hartman
parent 0cd39c9657
commit 5885fce7b4
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
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@ -268,6 +268,9 @@ dm_dp_mst_detect(struct drm_connector *connector,
struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
struct amdgpu_dm_connector *master = aconnector->mst_port;
if (drm_connector_is_unregistered(connector))
return connector_status_disconnected;
return drm_dp_mst_detect_port(connector, ctx, &master->mst_mgr,
aconnector->port);
}