drm: Improve on minor type helpers v3

Add a drm_is_legacy() helper, constify argument to drm_is_render_client(),
and use / change helpers where appropriate.

v2: s/drm_is_legacy/drm_is_legacy_client/ and adapt to new code context.
v3: s/legacy_client/primary_client/
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>

drivers/gpu/drm/drm_crtc.c

@@ -1492,7 +1492,7 @@ int drm_mode_getresources(struct drm_device *dev, void *data,
 	mutex_unlock(&file_priv->fbs_lock);
 
 	drm_modeset_lock_all(dev);
-	if (file_priv->minor->type != DRM_MINOR_LEGACY) {
+	if (!drm_is_primary_client(file_priv)) {
 
 		mode_group = NULL;
 		list_for_each(lh, &dev->mode_config.crtc_list)
@@ -2848,7 +2848,7 @@ int drm_mode_getfb(struct drm_device *dev,
 	r->pitch = fb->pitches[0];
 	if (fb->funcs->create_handle) {
 		if (file_priv->is_master || capable(CAP_SYS_ADMIN) ||
-		    file_priv->minor->type == DRM_MINOR_CONTROL) {
+		    drm_is_control_client(file_priv)) {
 			ret = fb->funcs->create_handle(fb, file_priv,
 						       &r->handle);
 		} else {

drivers/gpu/drm/drm_fops.c

@@ -232,8 +232,7 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
 	/* if there is no current master make this fd it, but do not create
 	 * any master object for render clients */
 	mutex_lock(&dev->struct_mutex);
-	if (!priv->minor->master && !drm_is_render_client(priv) &&
-	    !drm_is_control_client(priv)) {
+	if (drm_is_primary_client(priv) && !priv->minor->master) {
 		/* create a new master */
 		priv->minor->master = drm_master_create(priv->minor);
 		if (!priv->minor->master) {
@@ -271,8 +270,7 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
 				goto out_close;
 			}
 		}
-	} else if (!drm_is_render_client(priv) &&
-		   !drm_is_control_client(priv)) {
+	} else if (drm_is_primary_client(priv)) {
 		/* get a reference to the master */
 		priv->master = drm_master_get(priv->minor->master);
 	}

include/drm/drmP.h

@@ -1202,7 +1202,7 @@ static inline bool drm_modeset_is_locked(struct drm_device *dev)
 	return mutex_is_locked(&dev->mode_config.mutex);
 }
 
-static inline bool drm_is_render_client(struct drm_file *file_priv)
+static inline bool drm_is_render_client(const struct drm_file *file_priv)
 {
 	return file_priv->minor->type == DRM_MINOR_RENDER;
 }
@@ -1212,6 +1212,11 @@ static inline bool drm_is_control_client(const struct drm_file *file_priv)
 	return file_priv->minor->type == DRM_MINOR_CONTROL;
 }
 
+static inline bool drm_is_primary_client(const struct drm_file *file_priv)
+{
+	return file_priv->minor->type == DRM_MINOR_LEGACY;
+}
+
 /******************************************************************/
 /** \name Internal function definitions */
 /*@{*/