diff options
Diffstat (limited to 'drivers/gpu/drm/drm_atomic.c')
| -rw-r--r-- | drivers/gpu/drm/drm_atomic.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index c0f336d23f9c..095e87278a88 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -2039,7 +2039,7 @@ static int prepare_crtc_signaling(struct drm_device *dev, { struct drm_crtc *crtc; struct drm_crtc_state *crtc_state; - int i, ret; + int i, c = 0, ret; if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) return 0; @@ -2100,8 +2100,17 @@ static int prepare_crtc_signaling(struct drm_device *dev, crtc_state->event->base.fence = fence; } + + c++; } + /* + * Having this flag means user mode pends on event which will never + * reach due to lack of at least one CRTC for signaling + */ + if (c == 0 && (arg->flags & DRM_MODE_PAGE_FLIP_EVENT)) + return -EINVAL; + return 0; } |