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

From: Gustavo Padovan gustavo.padovan@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@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)) {