drm: disallow legacy sg ioctls for modesetting drivers
Only the radeon/r128/ati ums drivers use this. Furthermore the cleanup
was already only done for UMS drivers. Also a quick check of the ATI
ddx git history shows that only the UMS code ever used this facility.
So we can safely disallow these pair of ioctls for modesetting
drivers.
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/drm_scatter.c b/drivers/gpu/drm/drm_scatter.c
index dd8a648..1c78406 100644
--- a/drivers/gpu/drm/drm_scatter.c
+++ b/drivers/gpu/drm/drm_scatter.c
@@ -87,6 +87,9 @@
DRM_DEBUG("\n");
+ if (drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
if (!drm_core_check_feature(dev, DRIVER_SG))
return -EINVAL;
@@ -197,6 +200,9 @@
struct drm_scatter_gather *request = data;
struct drm_sg_mem *entry;
+ if (drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
if (!drm_core_check_feature(dev, DRIVER_SG))
return -EINVAL;
