drm/i915/display: in skl_surf_address check for dpt-vma

touch dpt_vma->node only if dpt-vma is not NULL

Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231116150225.204233-2-juhapekka.heikkila@gmail.com

diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c b/drivers/gpu/drm/i915/display/skl_universal_plane.c
index 39499a0ec6c018b926c1d162b6077466645ef110..f5c77a018e104b03975cd89df5fb5ee4e45f01aa 100644 (file)
--- a/drivers/gpu/drm/i915/display/skl_universal_plane.c
+++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c
@@ -1006,7 +1006,8 @@ static u32 skl_surf_address(const struct intel_plane_state *plane_state,
                 * The DPT object contains only one vma, so the VMA's offset
                 * within the DPT is always 0.
                 */
-               drm_WARN_ON(&i915->drm, plane_state->dpt_vma->node.start);
+               drm_WARN_ON(&i915->drm, plane_state->dpt_vma &&
+                           plane_state->dpt_vma->node.start);
                drm_WARN_ON(&i915->drm, offset & 0x1fffff);
                return offset >> 9;
        } else {