devtmpfs: remove return value of devtmpfs_delete_node()

The only caller of device_del() does not check the return value. And
there's nothing we can do when cleaning things up on a remove path.
Let's make it a void function.

Signed-off-by: Longlong Xia <xialonglong1@huawei.com>
Link: https://lore.kernel.org/r/20230210095444.4067307-4-xialonglong1@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/base.h

@@ -215,10 +215,10 @@ void device_pm_move_to_tail(struct device *dev);
 
 #ifdef CONFIG_DEVTMPFS
 int devtmpfs_create_node(struct device *dev);
-int devtmpfs_delete_node(struct device *dev);
+void devtmpfs_delete_node(struct device *dev);
 #else
 static inline int devtmpfs_create_node(struct device *dev) { return 0; }
-static inline int devtmpfs_delete_node(struct device *dev) { return 0; }
+static inline void devtmpfs_delete_node(struct device *dev) { }
 #endif
 
 void software_node_notify(struct device *dev);

drivers/base/devtmpfs.c

@@ -147,22 +147,22 @@ int devtmpfs_create_node(struct device *dev)
 	return devtmpfs_submit_req(&req, tmp);
 }
 
-int devtmpfs_delete_node(struct device *dev)
+void devtmpfs_delete_node(struct device *dev)
 {
 	const char *tmp = NULL;
 	struct req req;
 
 	if (!thread)
-		return 0;
+		return;
 
 	req.name = device_get_devnode(dev, NULL, NULL, NULL, &tmp);
 	if (!req.name)
-		return -ENOMEM;
+		return;
 
 	req.mode = 0;
 	req.dev = dev;
 
-	return devtmpfs_submit_req(&req, tmp);
+	devtmpfs_submit_req(&req, tmp);
 }
 
 static int dev_mkdir(const char *name, umode_t mode)