drm/kms: allow drm_mode_group with no objects
Sometimes we could be controlling a device (such as an NVIDIA Tesla) that has no crtcs/encoders/connectors. One could argue that the driver should unset DRIVER_MODESET in this case, but that changes a whole heap of the DRM's other behaviours, and it's much easier to just be a modesetting driver without any outputs. Signed-off-by: Ben Skeggs <bskeggs@redhat.com> Signed-off-by: Dave Airlie <airlied@redhat.com>hifive-unleashed-5.1
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ccd6895d40
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d61a06862b
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@ -886,9 +886,6 @@ int drm_mode_group_init(struct drm_device *dev, struct drm_mode_group *group)
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total_objects += dev->mode_config.num_connector;
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total_objects += dev->mode_config.num_connector;
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total_objects += dev->mode_config.num_encoder;
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total_objects += dev->mode_config.num_encoder;
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if (total_objects == 0)
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return -EINVAL;
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group->id_list = kzalloc(total_objects * sizeof(uint32_t), GFP_KERNEL);
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group->id_list = kzalloc(total_objects * sizeof(uint32_t), GFP_KERNEL);
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if (!group->id_list)
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if (!group->id_list)
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return -ENOMEM;
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return -ENOMEM;
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