[PATCH] INPUT: Create symlinks for backwards compatibility

This creates symlinks in /sys/class/input/ to the nested class devices
to help userspace cope with the nesting.

Unfortunatly udev still needs to be updated as it can't handle symlinks
properly here :(
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/input/evdev.c

@@ -661,6 +661,7 @@ static struct file_operations evdev_fops = {
 static struct input_handle *evdev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
 {
 	struct evdev *evdev;
+	struct class_device *cdev;
 	int minor;
 
 	for (minor = 0; minor < EVDEV_MINORS && evdev_table[minor]; minor++);
@@ -686,9 +687,13 @@ static struct input_handle *evdev_connect(struct input_handler *handler, struct
 
 	evdev_table[minor] = evdev;
 
-	class_device_create(&input_class, &dev->cdev,
+	cdev = class_device_create(&input_class, &dev->cdev,
 			MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + minor),
-			dev->cdev.dev, "event%d", minor);
+			dev->cdev.dev, evdev->name);
+
+	/* temporary symlink to keep userspace happy */
+	sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
+			  evdev->name);
 
 	return &evdev->handle;
 }
@@ -698,6 +703,7 @@ static void evdev_disconnect(struct input_handle *handle)
 	struct evdev *evdev = handle->private;
 	struct evdev_list *list;
 
+	sysfs_remove_link(&input_class.subsys.kset.kobj, evdev->name);
 	class_device_destroy(&input_class,
 			MKDEV(INPUT_MAJOR, EVDEV_MINOR_BASE + evdev->minor));
 	evdev->exist = 0;

drivers/input/joydev.c

@@ -448,6 +448,7 @@ static struct file_operations joydev_fops = {
 static struct input_handle *joydev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
 {
 	struct joydev *joydev;
+	struct class_device *cdev;
 	int i, j, t, minor;
 
 	for (minor = 0; minor < JOYDEV_MINORS && joydev_table[minor]; minor++);
@@ -513,9 +514,13 @@ static struct input_handle *joydev_connect(struct input_handler *handler, struct
 
 	joydev_table[minor] = joydev;
 
-	class_device_create(&input_class, &dev->cdev,
+	cdev = class_device_create(&input_class, &dev->cdev,
 			MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + minor),
-			dev->cdev.dev, "js%d", minor);
+			dev->cdev.dev, joydev->name);
+
+	/* temporary symlink to keep userspace happy */
+	sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
+			  joydev->name);
 
 	return &joydev->handle;
 }
@@ -525,6 +530,7 @@ static void joydev_disconnect(struct input_handle *handle)
 	struct joydev *joydev = handle->private;
 	struct joydev_list *list;
 
+	sysfs_remove_link(&input_class.subsys.kset.kobj, joydev->name);
 	class_device_destroy(&input_class, MKDEV(INPUT_MAJOR, JOYDEV_MINOR_BASE + joydev->minor));
 	joydev->exist = 0;
 

drivers/input/mousedev.c

@@ -620,6 +620,7 @@ static struct file_operations mousedev_fops = {
 static struct input_handle *mousedev_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id)
 {
 	struct mousedev *mousedev;
+	struct class_device *cdev;
 	int minor = 0;
 
 	for (minor = 0; minor < MOUSEDEV_MINORS && mousedev_table[minor]; minor++);
@@ -648,9 +649,13 @@ static struct input_handle *mousedev_connect(struct input_handler *handler, stru
 
 	mousedev_table[minor] = mousedev;
 
-	class_device_create(&input_class, &dev->cdev,
+	cdev = class_device_create(&input_class, &dev->cdev,
 			MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + minor),
-			dev->cdev.dev, "mouse%d", minor);
+			dev->cdev.dev, mousedev->name);
+
+	/* temporary symlink to keep userspace happy */
+	sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
+			  mousedev->name);
 
 	return &mousedev->handle;
 }
@@ -660,6 +665,7 @@ static void mousedev_disconnect(struct input_handle *handle)
 	struct mousedev *mousedev = handle->private;
 	struct mousedev_list *list;
 
+	sysfs_remove_link(&input_class.subsys.kset.kobj, mousedev->name);
 	class_device_destroy(&input_class,
 			MKDEV(INPUT_MAJOR, MOUSEDEV_MINOR_BASE + mousedev->minor));
 	mousedev->exist = 0;

drivers/input/tsdev.c

@@ -368,6 +368,7 @@ static struct input_handle *tsdev_connect(struct input_handler *handler,
 					  struct input_device_id *id)
 {
 	struct tsdev *tsdev;
+	struct class_device *cdev;
 	int minor, delta;
 
 	for (minor = 0; minor < TSDEV_MINORS/2 && tsdev_table[minor];
@@ -409,9 +410,13 @@ static struct input_handle *tsdev_connect(struct input_handler *handler,
 
 	tsdev_table[minor] = tsdev;
 
-	class_device_create(&input_class, &dev->cdev,
+	cdev = class_device_create(&input_class, &dev->cdev,
 			MKDEV(INPUT_MAJOR, TSDEV_MINOR_BASE + minor),
-			dev->cdev.dev, "ts%d", minor);
+			dev->cdev.dev, tsdev->name);
+
+	/* temporary symlink to keep userspace happy */
+	sysfs_create_link(&input_class.subsys.kset.kobj, &cdev->kobj,
+			  tsdev->name);
 
 	return &tsdev->handle;
 }
@@ -421,6 +426,7 @@ static void tsdev_disconnect(struct input_handle *handle)
 	struct tsdev *tsdev = handle->private;
 	struct tsdev_list *list;
 
+	sysfs_remove_link(&input_class.subsys.kset.kobj, tsdev->name);
 	class_device_destroy(&input_class,
 			MKDEV(INPUT_MAJOR, TSDEV_MINOR_BASE + tsdev->minor));
 	tsdev->exist = 0;