diff options
| -rw-r--r-- | drivers/gpu/drm/drm_irq.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index eba6337f5860..2151ea551d3b 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c @@ -616,10 +616,18 @@ int drm_control(struct drm_device *dev, void *data, void drm_calc_timestamping_constants(struct drm_crtc *crtc, const struct drm_display_mode *mode) { - struct drm_vblank_crtc *vblank = &crtc->dev->vblank[drm_crtc_index(crtc)]; + struct drm_device *dev = crtc->dev; + unsigned int pipe = drm_crtc_index(crtc); + struct drm_vblank_crtc *vblank = &dev->vblank[pipe]; int linedur_ns = 0, framedur_ns = 0; int dotclock = mode->crtc_clock; + if (!dev->num_crtcs) + return; + + if (WARN_ON(pipe >= dev->num_crtcs)) + return; + /* Valid dotclock? */ if (dotclock > 0) { int frame_size = mode->crtc_htotal * mode->crtc_vtotal; |