drm/exynos: drop DRM_AUTH from DRM_RENDER_ALLOW ioctls

The authentication can be circumvented, by design, by using the render
node.

From the driver POV there is no distinction between primary and render
nodes, thus we can drop the token.

Cc: Inki Dae <inki.dae@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: NEmil Velikov <emil.velikov@collabora.com>
Acked-by: NInki Dae <inki.dae@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190527081741.14235-4-emil.l.velikov@gmail.com

drivers/gpu/drm/exynos/exynos_drm_drv.c

@@ -77,29 +77,29 @@ static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
 
 static const struct drm_ioctl_desc exynos_ioctls[] = {
 	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
-			DRM_AUTH | DRM_RENDER_ALLOW),
+			DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP, exynos_drm_gem_map_ioctl,
-			DRM_AUTH | DRM_RENDER_ALLOW),
+			DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET, exynos_drm_gem_get_ioctl,
 			DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION, vidi_connection_ioctl,
 			DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER, exynos_g2d_get_ver_ioctl,
-			DRM_AUTH | DRM_RENDER_ALLOW),
+			DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST, exynos_g2d_set_cmdlist_ioctl,
-			DRM_AUTH | DRM_RENDER_ALLOW),
+			DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC, exynos_g2d_exec_ioctl,
-			DRM_AUTH | DRM_RENDER_ALLOW),
+			DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_RESOURCES,
 			exynos_drm_ipp_get_res_ioctl,
-			DRM_AUTH | DRM_RENDER_ALLOW),
+			DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_CAPS, exynos_drm_ipp_get_caps_ioctl,
-			DRM_AUTH | DRM_RENDER_ALLOW),
+			DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_LIMITS,
 			exynos_drm_ipp_get_limits_ioctl,
-			DRM_AUTH | DRM_RENDER_ALLOW),
+			DRM_RENDER_ALLOW),
 	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_COMMIT, exynos_drm_ipp_commit_ioctl,
-			DRM_AUTH | DRM_RENDER_ALLOW),
+			DRM_RENDER_ALLOW),
 };
 
 static const struct file_operations exynos_drm_driver_fops = {