Warn when refcount is > 0 in drm_vblank_cleanup.
Signed-off-by: PrasannaKumar Muralidharan <prasannatsmkumar@xxxxxxxxx>
---
Changes in v4:
* Print refcount value.
Changes in v3:
* Dropped i915 patch that is used for testing this.
No changes in v2.
drivers/gpu/drm/drm_vblank.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c
index 3e61aeb..062cc17 100644
--- a/drivers/gpu/drm/drm_vblank.c
+++ b/drivers/gpu/drm/drm_vblank.c
@@ -403,9 +403,15 @@ void drm_vblank_cleanup(struct drm_device *dev)
return;
for (pipe = 0; pipe < dev->num_crtcs; pipe++) {
+ unsigned int refcount;
struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
- WARN_ON(atomic_read(&vblank->refcount) > 0);
+ refcount = atomic_read(&vblank->refcount);
+ if (refcount > 0) {
+ DRM_DEBUG("vblank refcount: %u in %s\n", refcount,
+ __func__);
+ WARN_ON(refcount > 0);
+ }
WARN_ON(READ_ONCE(vblank->enabled) &&
drm_core_check_feature(dev, DRIVER_MODESET));
--
2.10.0
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