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drm/amdgpu: make sure ddc_bus is valid in connector unregister

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This should only happen on boards TV connectors which do not
have a ddc bus for those connectors.  None of the asics supported
by amdgpu support tv, so we shouldn't hit this, but check
to be on the safe side (e.g., bios bug for example).

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2016-10-31 12:27:52 -04:00
parent 0a6e21056e
commit eef2b41122
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c
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@ -769,7 +769,7 @@ static void amdgpu_connector_unregister(struct drm_connector *connector)
{
struct amdgpu_connector *amdgpu_connector = to_amdgpu_connector(connector);
if (amdgpu_connector->ddc_bus->has_aux) {
if (amdgpu_connector->ddc_bus && amdgpu_connector->ddc_bus->has_aux) {
drm_dp_aux_unregister(&amdgpu_connector->ddc_bus->aux);
amdgpu_connector->ddc_bus->has_aux = false;
}