[PATCH] wsync

[Chris Wilson]

---
 drivers/gpu/drm/drm_vblank.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c
index 70f2b9593edc..6c7df06b2a1f 100644
--- a/drivers/gpu/drm/drm_vblank.c
+++ b/drivers/gpu/drm/drm_vblank.c
@@ -1572,7 +1572,8 @@ bool drm_handle_vblank(struct drm_device *dev, unsigned int pipe)
 
 	spin_unlock(&dev->vblank_time_lock);
 
-	wake_up(&vblank->queue);
+	wake_up_interruptible_sync(&vblank->queue);
+	wake_up_all(&vblank->queue);
 
 	/* With instant-off, we defer disabling the interrupt until after
 	 * we finish processing the following vblank after all events have
-- 
2.14.1