diff options
Diffstat (limited to 'drivers/gpu/drm/drm_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index d8d65f4..4c68f76 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -2617,6 +2617,15 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev, goto out; crtc = obj_to_crtc(obj); + if (crtc->fb == NULL) { + /* The framebuffer is currently unbound, presumably + * due to a hotplug event, that userspace has not + * yet discovered. + */ + ret = -EBUSY; + goto out; + } + if (crtc->funcs->page_flip == NULL) goto out; |