92  * device. However, this doesn't mean that the minor is active. Minors are
111 	struct drm_minor *minor;  in drm_minor_alloc()  local
115 	minor = kzalloc(sizeof(*minor), GFP_KERNEL);  in drm_minor_alloc()
116 	if (!minor)  in drm_minor_alloc()
119 	minor->type = type;  in drm_minor_alloc()
120 	minor->dev = dev;  in drm_minor_alloc()
135 	minor->index = r;  in drm_minor_alloc()
137 	minor->kdev = drm_sysfs_minor_alloc(minor);  in drm_minor_alloc()
138 	if (IS_ERR(minor->kdev)) {  in drm_minor_alloc()
139 		r = PTR_ERR(minor->kdev);  in drm_minor_alloc()
143 	*drm_minor_get_slot(dev, type) = minor;  in drm_minor_alloc()
148 	idr_remove(&drm_minors_idr, minor->index);  in drm_minor_alloc()
151 	kfree(minor);  in drm_minor_alloc()
157 	struct drm_minor **slot, *minor;  in drm_minor_free()  local
161 	minor = *slot;  in drm_minor_free()
162 	if (!minor)  in drm_minor_free()
165 	put_device(minor->kdev);  in drm_minor_free()
168 	idr_remove(&drm_minors_idr, minor->index);  in drm_minor_free()
171 	kfree(minor);  in drm_minor_free()
177 	struct drm_minor *minor;  in drm_minor_register()  local
183 	minor = *drm_minor_get_slot(dev, type);  in drm_minor_register()
184 	if (!minor)  in drm_minor_register()
187 	ret = drm_debugfs_init(minor, minor->index, drm_debugfs_root);  in drm_minor_register()
193 	ret = device_add(minor->kdev);  in drm_minor_register()
197 	/* replace NULL with @minor so lookups will succeed from now on */  in drm_minor_register()
199 	idr_replace(&drm_minors_idr, minor, minor->index);  in drm_minor_register()
202 	DRM_DEBUG("new minor registered %d\n", minor->index);  in drm_minor_register()
206 	drm_debugfs_cleanup(minor);  in drm_minor_register()
212 	struct drm_minor *minor;  in drm_minor_unregister()  local
215 	minor = *drm_minor_get_slot(dev, type);  in drm_minor_unregister()
216 	if (!minor || !device_is_registered(minor->kdev))  in drm_minor_unregister()
219 	/* replace @minor with NULL so lookups will fail from now on */  in drm_minor_unregister()
221 	idr_replace(&drm_minors_idr, NULL, minor->index);  in drm_minor_unregister()
224 	device_del(minor->kdev);  in drm_minor_unregister()
225 	dev_set_drvdata(minor->kdev, NULL); /* safety belt */  in drm_minor_unregister()
226 	drm_debugfs_cleanup(minor);  in drm_minor_unregister()
230  * Looks up the given minor-ID and returns the respective DRM-minor object. The
234  * As long as you hold this minor, it is guaranteed that the object and the
235  * minor->dev pointer will stay valid! However, the device may get unplugged and
236  * unregistered while you hold the minor.
240 	struct drm_minor *minor;  in drm_minor_acquire()  local
244 	minor = idr_find(&drm_minors_idr, minor_id);  in drm_minor_acquire()
245 	if (minor)  in drm_minor_acquire()
246 		drm_dev_get(minor->dev);  in drm_minor_acquire()
249 	if (!minor) {  in drm_minor_acquire()
251 	} else if (drm_dev_is_unplugged(minor->dev)) {  in drm_minor_acquire()
252 		drm_dev_put(minor->dev);  in drm_minor_acquire()
256 	return minor;  in drm_minor_acquire()
259 void drm_minor_release(struct drm_minor *minor)  in drm_minor_release()  argument
261 	drm_dev_put(minor->dev);  in drm_minor_release()
720 	struct drm_minor *minor;  in create_compat_control_link()  local
727 	minor = *drm_minor_get_slot(dev, DRM_MINOR_PRIMARY);  in create_compat_control_link()
728 	if (!minor)  in create_compat_control_link()
740 	name = kasprintf(GFP_KERNEL, "controlD%d", minor->index + 64);  in create_compat_control_link()
744 	ret = sysfs_create_link(minor->kdev->kobj.parent,  in create_compat_control_link()
745 				&minor->kdev->kobj,  in create_compat_control_link()
755 	struct drm_minor *minor;  in remove_compat_control_link()  local
761 	minor = *drm_minor_get_slot(dev, DRM_MINOR_PRIMARY);  in remove_compat_control_link()
762 	if (!minor)  in remove_compat_control_link()
765 	name = kasprintf(GFP_KERNEL, "controlD%d", minor->index + 64);  in remove_compat_control_link()
769 	sysfs_remove_link(minor->kdev->kobj.parent, name);  in remove_compat_control_link()
826 	DRM_INFO("Initialized %s %d.%d.%d %s for %s on minor %d\n",  in drm_dev_register()
827 		 driver->name, driver->major, driver->minor,  in drm_dev_register()
916  *  - DRM minor management
921  * interface registered on a DRM device, you can request minor numbers from DRM
924  * registered minor.
930 	struct drm_minor *minor;  in drm_stub_open()  local
936 	minor = drm_minor_acquire(iminor(inode));  in drm_stub_open()
937 	if (IS_ERR(minor)) {  in drm_stub_open()
938 		err = PTR_ERR(minor);  in drm_stub_open()
942 	new_fops = fops_get(minor->dev->driver->fops);  in drm_stub_open()
955 	drm_minor_release(minor);  in drm_stub_open()