diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index 1967e7fc98051413cc81d83b02512464d52e183b..dd3fd125995016a4b593e5845ea12eb95f977ea4 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c @@ -1056,6 +1056,9 @@ int drm_vblank_get(struct drm_device *dev, int crtc) unsigned long irqflags; int ret = 0; + if (!dev->num_crtcs) + return -EINVAL; + if (WARN_ON(crtc >= dev->num_crtcs)) return -EINVAL;