[PATCH v3 3/4] drm_vblank_get: don't WARN_ON in case vblanks are not initialized

Signed-off-by: Gerd Hoffmann kraxel@redhat.com Reviewed-by: Alex Deucher alexander.deucher@amd.com --- drivers/gpu/drm/drm_irq.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index af9662e..265793c 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c @@ -1029,6 +1029,9 @@ 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;