drm: add control node checks missing from kms merge

This line that checks the DRM_CONTROL_ALLOW flag was missed from the KMS
merge.  Re-add the check on the IOCTL, as this is currently the only use of
this flag.

Signed-off-by: Jonas Bonn <jonas@southpole.se>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index c4ada8b..f01def1 100644 (file)
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -456,7 +456,8 @@ int drm_ioctl(struct inode *inode, struct file *filp,
                retcode = -EINVAL;
        } else if (((ioctl->flags & DRM_ROOT_ONLY) && !capable(CAP_SYS_ADMIN)) ||
                   ((ioctl->flags & DRM_AUTH) && !file_priv->authenticated) ||
-                  ((ioctl->flags & DRM_MASTER) && !file_priv->is_master)) {
+                  ((ioctl->flags & DRM_MASTER) && !file_priv->is_master) ||
+                  (!(ioctl->flags & DRM_CONTROL_ALLOW) && (file_priv->minor->type == DRM_MINOR_CONTROL))) {
                retcode = -EACCES;
        } else {
                if (cmd & (IOC_IN | IOC_OUT)) {