[PATCH v2 1/2] drm: drm_vblank_cleanup: WARN when refcount > 0

Warn when refcount > 0 in drm_vblank_cleanup.

Signed-off-by: PrasannaKumar Muralidharan prasannatsmkumar@gmail.com --- No change in v2.

drivers/gpu/drm/drm_vblank.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c index 70f2b95..3e61aeb 100644 --- a/drivers/gpu/drm/drm_vblank.c +++ b/drivers/gpu/drm/drm_vblank.c @@ -405,6 +405,8 @@ void drm_vblank_cleanup(struct drm_device *dev) for (pipe = 0; pipe < dev->num_crtcs; pipe++) { struct drm_vblank_crtc *vblank = &dev->vblank[pipe];

+ WARN_ON(atomic_read(&vblank->refcount) > 0); + WARN_ON(READ_ONCE(vblank->enabled) && drm_core_check_feature(dev, DRIVER_MODESET));