drm: Forbid legacy MAP functions for DRIVER_MODESET
Like in
commit 0e975980d435d58df2d430d688b8c18778b42218
Author: Peter Antoine <peter.antoine@intel.com>
Date: Tue Jun 23 08:18:49 2015 +0100
drm: Turn off Legacy Context Functions
we need to again make an exception for nouveau, but everyone else
really doesn't need this.
Dave Airlie dug out again why we need this: The problem is the legacy
dri1 open function the nouveau ddx called, and the problematic code is
actually in the X server itself. It was only fixed in
commit b1a630b48210d6a3c44994fce1b73273000ace5c
Author: Dave Airlie <airlied@redhat.com>
Date: Wed Nov 7 14:45:14 2012 +1000
nouveau: drop DRI1 device open interface.
Cc: Peter Antoine <peter.antoine@intel.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1461691808-12414-5-git-send-email-daniel.vetter@ffwll.ch
Link: http://patchwork.freedesktop.org/patch/msgid/1461691808-12414-6-git-send-email-daniel.vetter@ffwll.ch
diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c
index d92db70..e8a12a4 100644
--- a/drivers/gpu/drm/drm_bufs.c
+++ b/drivers/gpu/drm/drm_bufs.c
@@ -396,6 +396,10 @@
if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM))
return -EPERM;
+ if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+ drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
err = drm_addmap_core(dev, map->offset, map->size, map->type,
map->flags, &maplist);
@@ -438,6 +442,10 @@
int idx;
int i;
+ if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+ drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
idx = map->offset;
if (idx < 0)
return -EINVAL;
@@ -569,6 +577,10 @@
struct drm_map_list *r_list;
int ret;
+ if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) &&
+ drm_core_check_feature(dev, DRIVER_MODESET))
+ return -EINVAL;
+
mutex_lock(&dev->struct_mutex);
list_for_each_entry(r_list, &dev->maplist, head) {
if (r_list->map &&