[PATCH 2/2] drm: WARN_ON if a modeset driver uses legacy suspend/resume helpers

[Gustavo Padovan]

From: Gustavo Padovan <gustavo.pado...@collabora.co.uk>

Legacy s/r hooks are only used for shadow-attaching drivers, warn
when a KMS driver tries to use them.

Signed-off-by: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
---
 drivers/gpu/drm/drm_drv.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index b7bf4ce..4e76193 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -567,6 +567,8 @@ struct drm_device *drm_dev_alloc(struct drm_driver *driver,
                ret = drm_minor_alloc(dev, DRM_MINOR_CONTROL);
                if (ret)
                        goto err_minors;
+
+               WARN_ON(driver->suspend || driver->resume);
        }

        if (drm_core_check_feature(dev, DRIVER_RENDER)) {
-- 
2.1.0