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drm/radeon: Fix a missing check bug in radeon_dp_mst_detect()

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[ Upstream commit 25315ebfaefcffd126a266116b37bb8a3d1c4620 ]

In radeon_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: 9843ead08f18 ("drm/radeon: add DisplayPort MST support (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 2021-04-06 20:10:04 -07:00 committed by Greg Kroah-Hartman
parent a6d56760ea
commit c360228ecf
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/radeon/radeon_dp_mst.c
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@ -242,6 +242,9 @@ radeon_dp_mst_detect(struct drm_connector *connector,
to_radeon_connector(connector);
struct radeon_connector *master = radeon_connector->mst_port;
if (drm_connector_is_unregistered(connector))
return connector_status_disconnected;
return drm_dp_mst_detect_port(connector, ctx, &master->mst_mgr,
radeon_connector->port);
}