drm: Link directly from drm_master to drm_device
Master-based auth only exists for the legacy/primary drm_minor, hence
there can only be one per device. The goal here is to untangle the
epic dereference games of minor->master and master->minor which is
just massively confusing.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1465930269-7883-4-git-send-email-daniel.vetter@ffwll.ch
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 04310cb..6067fef 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -379,16 +379,19 @@
* struct drm_master - drm master structure
*
* @refcount: Refcount for this master object.
- * @minor: Link back to minor char device we are master for. Immutable.
+ * @dev: Link back to the DRM device
* @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.
* @unique_len: Length of unique field. Protected by drm_global_mutex.
* @magic_map: Map of used authentication tokens. Protected by struct_mutex.
* @lock: DRI lock information.
* @driver_priv: Pointer to driver-private information.
+ *
+ * Note that master structures are only relevant for the legacy/primary device
+ * nodes, hence there can only be one per device, not one per drm_minor.
*/
struct drm_master {
struct kref refcount;
- struct drm_minor *minor;
+ struct drm_device *dev;
char *unique;
int unique_len;
struct idr magic_map;