[PATCH v1] drm/radeon: Fix a missing check bug in radeon_dp_mst_detect()

[Yingjie Wang]

My pleasure!
At 2021-04-09 04:17:36, "Alex Deucher" <alexdeucher at gmail.com> wrote:
>Applied.  Thanks!
>
>Alex
>
>On Wed, Apr 7, 2021 at 2:23 AM <wangyingjie55 at 126.com> wrote:
>>
>> From: Yingjie Wang <wangyingjie55 at 126.com>
>>
>> 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 at 126.com>
>> ---
>>  drivers/gpu/drm/radeon/radeon_dp_mst.c | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/radeon/radeon_dp_mst.c b/drivers/gpu/drm/radeon/radeon_dp_mst.c
>> index 2c32186c4acd..4e4c937c36c6 100644
>> --- a/drivers/gpu/drm/radeon/radeon_dp_mst.c
>> +++ b/drivers/gpu/drm/radeon/radeon_dp_mst.c
>> @@ -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);
>>  }
>> --
>> 2.7.4
>>
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