drm/nvd9/disp: bail out of mode_set_base if no fb bound to crtc

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nvd0_display.c b/drivers/gpu/drm/nouveau/nvd0_display.c
index 20072fb784a5..23d63b4b3d77 100644
--- a/drivers/gpu/drm/nouveau/nvd0_display.c
+++ b/drivers/gpu/drm/nouveau/nvd0_display.c
@@ -391,6 +391,11 @@ nvd0_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
         int ret;
 
+        if (!crtc->fb) {
+                NV_DEBUG_KMS(crtc->dev, "No FB bound\n");
+                return 0;
+        }
+
         ret = nvd0_crtc_swap_fbs(crtc, old_fb);
         if (ret)
                 return ret;