GUC_DOORBELL_INVALID
GEM_BUG_ON(client->doorbell_id != GUC_DOORBELL_INVALID);
if (client->doorbell_id == GUC_DOORBELL_INVALID)
client->doorbell_id = GUC_DOORBELL_INVALID;
__update_doorbell_desc(client, GUC_DOORBELL_INVALID);
__update_doorbell_desc(client, GUC_DOORBELL_INVALID);
GEM_BUG_ON(db_id >= GUC_DOORBELL_INVALID);
GUC_DOORBELL_INVALID);
GUC_DOORBELL_INVALID);
client->doorbell_id = GUC_DOORBELL_INVALID;