95  * device. However, this doesn't mean that the minor is active. Minors are
114 	struct drm_minor *minor;  in drm_minor_alloc()  local
118 	minor = kzalloc(sizeof(*minor), GFP_KERNEL);  in drm_minor_alloc()
119 	if (!minor)  in drm_minor_alloc()
122 	minor->type = type;  in drm_minor_alloc()
123 	minor->dev = dev;  in drm_minor_alloc()
138 	minor->index = r;  in drm_minor_alloc()
140 	minor->kdev = drm_sysfs_minor_alloc(minor);  in drm_minor_alloc()
141 	if (IS_ERR(minor->kdev)) {  in drm_minor_alloc()
142 		r = PTR_ERR(minor->kdev);  in drm_minor_alloc()
146 	*drm_minor_get_slot(dev, type) = minor;  in drm_minor_alloc()
151 	idr_remove(&drm_minors_idr, minor->index);  in drm_minor_alloc()
154 	kfree(minor);  in drm_minor_alloc()
160 	struct drm_minor **slot, *minor;  in drm_minor_free()  local
164 	minor = *slot;  in drm_minor_free()
165 	if (!minor)  in drm_minor_free()
168 	put_device(minor->kdev);  in drm_minor_free()
171 	idr_remove(&drm_minors_idr, minor->index);  in drm_minor_free()
174 	kfree(minor);  in drm_minor_free()
180 	struct drm_minor *minor;  in drm_minor_register()  local
186 	minor = *drm_minor_get_slot(dev, type);  in drm_minor_register()
187 	if (!minor)  in drm_minor_register()
190 	ret = drm_debugfs_init(minor, minor->index, drm_debugfs_root);  in drm_minor_register()
196 	ret = device_add(minor->kdev);  in drm_minor_register()
200 	/* replace NULL with @minor so lookups will succeed from now on */  in drm_minor_register()
202 	idr_replace(&drm_minors_idr, minor, minor->index);  in drm_minor_register()
205 	DRM_DEBUG("new minor registered %d\n", minor->index);  in drm_minor_register()
209 	drm_debugfs_cleanup(minor);  in drm_minor_register()
215 	struct drm_minor *minor;  in drm_minor_unregister()  local
218 	minor = *drm_minor_get_slot(dev, type);  in drm_minor_unregister()
219 	if (!minor || !device_is_registered(minor->kdev))  in drm_minor_unregister()
222 	/* replace @minor with NULL so lookups will fail from now on */  in drm_minor_unregister()
224 	idr_replace(&drm_minors_idr, NULL, minor->index);  in drm_minor_unregister()
227 	device_del(minor->kdev);  in drm_minor_unregister()
228 	dev_set_drvdata(minor->kdev, NULL); /* safety belt */  in drm_minor_unregister()
229 	drm_debugfs_cleanup(minor);  in drm_minor_unregister()
233  * Looks up the given minor-ID and returns the respective DRM-minor object. The
237  * As long as you hold this minor, it is guaranteed that the object and the
238  * minor->dev pointer will stay valid! However, the device may get unplugged and
239  * unregistered while you hold the minor.
243 	struct drm_minor *minor;  in drm_minor_acquire()  local
247 	minor = idr_find(&drm_minors_idr, minor_id);  in drm_minor_acquire()
248 	if (minor)  in drm_minor_acquire()
249 		drm_dev_get(minor->dev);  in drm_minor_acquire()
252 	if (!minor) {  in drm_minor_acquire()
254 	} else if (drm_dev_is_unplugged(minor->dev)) {  in drm_minor_acquire()
255 		drm_dev_put(minor->dev);  in drm_minor_acquire()
259 	return minor;  in drm_minor_acquire()
262 void drm_minor_release(struct drm_minor *minor)  in drm_minor_release()  argument
264 	drm_dev_put(minor->dev);  in drm_minor_release()
886 	struct drm_minor *minor;  in create_compat_control_link()  local
893 	minor = *drm_minor_get_slot(dev, DRM_MINOR_PRIMARY);  in create_compat_control_link()
894 	if (!minor)  in create_compat_control_link()
906 	name = kasprintf(GFP_KERNEL, "controlD%d", minor->index + 64);  in create_compat_control_link()
910 	ret = sysfs_create_link(minor->kdev->kobj.parent,  in create_compat_control_link()
911 				&minor->kdev->kobj,  in create_compat_control_link()
921 	struct drm_minor *minor;  in remove_compat_control_link()  local
927 	minor = *drm_minor_get_slot(dev, DRM_MINOR_PRIMARY);  in remove_compat_control_link()
928 	if (!minor)  in remove_compat_control_link()
931 	name = kasprintf(GFP_KERNEL, "controlD%d", minor->index + 64);  in remove_compat_control_link()
935 	sysfs_remove_link(minor->kdev->kobj.parent, name);  in remove_compat_control_link()
992 	DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",  in drm_dev_register()
993 		 driver->name, driver->major, driver->minor,  in drm_dev_register()
1079  *  - DRM minor management
1084  * interface registered on a DRM device, you can request minor numbers from DRM
1087  * registered minor.
1093 	struct drm_minor *minor;  in drm_stub_open()  local
1099 	minor = drm_minor_acquire(iminor(inode));  in drm_stub_open()
1100 	if (IS_ERR(minor)) {  in drm_stub_open()
1101 		err = PTR_ERR(minor);  in drm_stub_open()
1105 	new_fops = fops_get(minor->dev->driver->fops);  in drm_stub_open()
1118 	drm_minor_release(minor);  in drm_stub_open()