input: utilize new cdev_device_add helper function

Replace the open coded registration of the cdev and dev with the
new device_add_cdev() helper in evdev, joydev and mousedev. The helper
replaces a common pattern by taking the proper reference against the
parent device and adding both the cdev and the device.
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/input/evdev.c

@@ -1354,8 +1354,6 @@ static void evdev_cleanup(struct evdev *evdev)
 	evdev_mark_dead(evdev);
 	evdev_hangup(evdev);
 
-	cdev_del(&evdev->cdev);
-
 	/* evdev is marked dead so no one else accesses evdev->open */
 	if (evdev->open) {
 		input_flush_device(handle, NULL);
@@ -1416,12 +1414,8 @@ static int evdev_connect(struct input_handler *handler, struct input_dev *dev,
 		goto err_free_evdev;
 
 	cdev_init(&evdev->cdev, &evdev_fops);
-	evdev->cdev.kobj.parent = &evdev->dev.kobj;
-	error = cdev_add(&evdev->cdev, evdev->dev.devt, 1);
-	if (error)
-		goto err_unregister_handle;
 
-	error = device_add(&evdev->dev);
+	error = cdev_device_add(&evdev->cdev, &evdev->dev);
 	if (error)
 		goto err_cleanup_evdev;
 
@@ -1429,7 +1423,6 @@ static int evdev_connect(struct input_handler *handler, struct input_dev *dev,
 
  err_cleanup_evdev:
 	evdev_cleanup(evdev);
- err_unregister_handle:
 	input_unregister_handle(&evdev->handle);
  err_free_evdev:
 	put_device(&evdev->dev);
@@ -1442,7 +1435,7 @@ static void evdev_disconnect(struct input_handle *handle)
 {
 	struct evdev *evdev = handle->private;
 
-	device_del(&evdev->dev);
+	cdev_device_del(&evdev->cdev, &evdev->dev);
 	evdev_cleanup(evdev);
 	input_free_minor(MINOR(evdev->dev.devt));
 	input_unregister_handle(handle);

drivers/input/joydev.c

@@ -742,8 +742,6 @@ static void joydev_cleanup(struct joydev *joydev)
 	joydev_mark_dead(joydev);
 	joydev_hangup(joydev);
 
-	cdev_del(&joydev->cdev);
-
 	/* joydev is marked dead so no one else accesses joydev->open */
 	if (joydev->open)
 		input_close_device(handle);
@@ -913,12 +911,8 @@ static int joydev_connect(struct input_handler *handler, struct input_dev *dev,
 		goto err_free_joydev;
 
 	cdev_init(&joydev->cdev, &joydev_fops);
-	joydev->cdev.kobj.parent = &joydev->dev.kobj;
-	error = cdev_add(&joydev->cdev, joydev->dev.devt, 1);
-	if (error)
-		goto err_unregister_handle;
 
-	error = device_add(&joydev->dev);
+	error = cdev_device_add(&joydev->cdev, &joydev->dev);
 	if (error)
 		goto err_cleanup_joydev;
 
@@ -926,7 +920,6 @@ static int joydev_connect(struct input_handler *handler, struct input_dev *dev,
 
  err_cleanup_joydev:
 	joydev_cleanup(joydev);
- err_unregister_handle:
 	input_unregister_handle(&joydev->handle);
  err_free_joydev:
 	put_device(&joydev->dev);
@@ -939,7 +932,7 @@ static void joydev_disconnect(struct input_handle *handle)
 {
 	struct joydev *joydev = handle->private;
 
-	device_del(&joydev->dev);
+	cdev_device_del(&joydev->cdev, &joydev->dev);
 	joydev_cleanup(joydev);
 	input_free_minor(MINOR(joydev->dev.devt));
 	input_unregister_handle(handle);

drivers/input/mousedev.c

@@ -812,8 +812,6 @@ static void mousedev_cleanup(struct mousedev *mousedev)
 	mousedev_mark_dead(mousedev);
 	mousedev_hangup(mousedev);
 
-	cdev_del(&mousedev->cdev);
-
 	/* mousedev is marked dead so no one else accesses mousedev->open */
 	if (mousedev->open)
 		input_close_device(handle);
@@ -901,12 +899,8 @@ static struct mousedev *mousedev_create(struct input_dev *dev,
 	}
 
 	cdev_init(&mousedev->cdev, &mousedev_fops);
-	mousedev->cdev.kobj.parent = &mousedev->dev.kobj;
-	error = cdev_add(&mousedev->cdev, mousedev->dev.devt, 1);
-	if (error)
-		goto err_unregister_handle;
 
-	error = device_add(&mousedev->dev);
+	error = cdev_device_add(&mousedev->cdev, &mousedev->dev);
 	if (error)
 		goto err_cleanup_mousedev;
 
@@ -914,7 +908,6 @@ static struct mousedev *mousedev_create(struct input_dev *dev,
 
  err_cleanup_mousedev:
 	mousedev_cleanup(mousedev);
- err_unregister_handle:
 	if (!mixdev)
 		input_unregister_handle(&mousedev->handle);
  err_free_mousedev:
@@ -927,7 +920,7 @@ static struct mousedev *mousedev_create(struct input_dev *dev,
 
 static void mousedev_destroy(struct mousedev *mousedev)
 {
-	device_del(&mousedev->dev);
+	cdev_device_del(&mousedev->cdev, &mousedev->dev);
 	mousedev_cleanup(mousedev);
 	input_free_minor(MINOR(mousedev->dev.devt));
 	if (mousedev != mousedev_mix)