Revert "drm: drop redundant drm_file->is_master"
This reverts commit 48ba813701eb14b3008edefef4a0789b328e278c.
Thanks to Chris:
"drm_file->is_master is not synomous with having drm_file->master ==
drm_file->minor->master. This is because drm_file->master is the same
for all drm_files of the same generation and so when there is a master,
every drm_file believes itself to be the master. Confusion ensues and
things go pear shaped when one file is closed and there is no master
anymore."
Conflicts:
drivers/gpu/drm/drm_drv.c
drivers/gpu/drm/drm_stub.c
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
index d3d1a8c..40be746 100644
--- a/drivers/gpu/drm/drm_ioctl.c
+++ b/drivers/gpu/drm/drm_ioctl.c
@@ -607,7 +607,7 @@
return -EACCES;
/* MASTER is only for master or control clients */
- if (unlikely((flags & DRM_MASTER) && !drm_is_master(file_priv) &&
+ if (unlikely((flags & DRM_MASTER) && !file_priv->is_master &&
!drm_is_control_client(file_priv)))
return -EACCES;