This will cause drm_atomic_helper_page_flip and drm_mode_atomic_ioctl to
fail with -EINVAL if a event is requested on a inactive crtc.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
---
diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index d719ce0b10a0..679577e8e02d 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -476,6 +476,12 @@ static int drm_atomic_crtc_check(struct drm_crtc *crtc,
return -EINVAL;
}
+ if (!state->active && state->event) {
+ DRM_DEBUG_ATOMIC("[CRTC:%d] requesting event and not active\n",
+ crtc->base.id);
+ return -EINVAL;
+ }
+
/* The state->enable vs. state->mode_blob checks can be WARN_ON,
* as this is a kernel-internal detail that userspace should never
* be able to trigger. */
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