[PATCH 08/10] drm: Forbid legacy MAP functions for DRIVER_MODESET

[Daniel Vetter]

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commit 0e975980d435d58df2d430d688b8c18778b42218
Author: Peter Antoine <peter.antoine at 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.

Cc: Peter Antoine <peter.antoine at intel.com>
Cc: Ben Skeggs <bskeggs at redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
 drivers/gpu/drm/drm_bufs.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c
index d92db7007f62..e8a12a4fd400 100644
--- a/drivers/gpu/drm/drm_bufs.c
+++ b/drivers/gpu/drm/drm_bufs.c
@@ -396,6 +396,10 @@ int drm_legacy_addmap_ioctl(struct drm_device *dev, void 
*data,
        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 drm_legacy_getmap_ioctl(struct drm_device *dev, void 
*data,
        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 @@ int drm_legacy_rmmap_ioctl(struct drm_device *dev, void 
*data,
        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 &&
-- 
2.8.0.rc3