There could be the case that the page flip operation isn't finished correctly with some abnormal condition such as panel reset. So this patch replaces wait_event() with wait_event_timeout() to avoid waiting for page flip completion infinitely. Signed-off-by: YoungJun Cho <yj44.cho@xxxxxxxxxxx> Acked-by: Inki Dae <inki.dae@xxxxxxxxxxx> Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> --- drivers/gpu/drm/exynos/exynos_drm_crtc.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c index 95c9435..485fa26 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c @@ -69,8 +69,9 @@ static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode) if (mode > DRM_MODE_DPMS_ON) { /* wait for the completion of page flip. */ - wait_event(exynos_crtc->pending_flip_queue, - atomic_read(&exynos_crtc->pending_flip) == 0); + wait_event_timeout(exynos_crtc->pending_flip_queue, + !atomic_read(&exynos_crtc->pending_flip), + HZ/20); drm_vblank_off(crtc->dev, exynos_crtc->pipe); } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html