drm: Send pending vblank events before disabling vblank.

void drm_vblank_off(struct drm_device *dev, int crtc)

{

	struct drm_pending_vblank_event *e, *t;

	struct timeval now;

	unsigned long irqflags;

	unsigned int seq;

	spin_lock_irqsave(&dev->vbl_lock, irqflags);

	vblank_disable_and_save(dev, crtc);

	DRM_WAKEUP(&dev->vbl_queue[crtc]);

	/* Send any queued vblank events, lest the natives grow disquiet */

	seq = drm_vblank_count_and_time(dev, crtc, &now);

	list_for_each_entry_safe(e, t, &dev->vblank_event_list, base.link) {

		if (e->pipe != crtc)

			continue;

		DRM_DEBUG("Sending premature vblank event on disable: \

			  wanted %d, current %d\n",

			  e->event.sequence, seq);

		e->event.sequence = seq;

		e->event.tv_sec = now.tv_sec;

		e->event.tv_usec = now.tv_usec;

		drm_vblank_put(dev, e->pipe);

		list_move_tail(&e->base.link, &e->base.file_priv->event_list);

		wake_up_interruptible(&e->base.file_priv->event_wait);

		trace_drm_vblank_event_delivered(e->base.pid, e->pipe,

						 e->event.sequence);

	}

	spin_unlock_irqrestore(&dev->vbl_lock, irqflags);

}

EXPORT_SYMBOL(drm_vblank_off);