drm: when queuing an event with NEXTONMISS, return queued sequence to userspace

If we queue a vblank event but miss it, we should return the actual
sequence number we queued to userspace, so its event handling function
will know which event to look for.

Acked-by: Kristian Høgsberg <krh@bitplanet.net>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 72754aca7abfc8ef22db1482cd5e58699f546d96..6b3ce6d3884883f4d02269773b12b5ddb574f4d1 100644 (file)
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -585,6 +585,7 @@ static int drm_queue_vblank_event(struct drm_device *dev, int pipe,
        if ((vblwait->request.type & _DRM_VBLANK_NEXTONMISS) &&
            (seq - vblwait->request.sequence) <= (1 << 23)) {
                vblwait->request.sequence = seq + 1;
+               vblwait->reply.sequence = vblwait->request.sequence;
        }
 
        DRM_DEBUG("event on vblank count %d, current %d, crtc %d\n",