vfs: clean up vfs_rename_other

Simplify control flow to match vfs_rename_dir.
Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/namei.c

@@ -3006,7 +3006,7 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
 static int vfs_rename_other(struct inode *old_dir, struct dentry *old_dentry,
 			    struct inode *new_dir, struct dentry *new_dentry)
 {
-	struct inode *target;
+	struct inode *target = new_dentry->d_inode;
 	int error;
 
 	error = security_inode_rename(old_dir, old_dentry, new_dir, new_dentry);
@@ -3014,19 +3014,22 @@ static int vfs_rename_other(struct inode *old_dir, struct dentry *old_dentry,
 		return error;
 
 	dget(new_dentry);
-	target = new_dentry->d_inode;
 	if (target)
 		mutex_lock(&target->i_mutex);
+
+	error = -EBUSY;
 	if (d_mountpoint(old_dentry)||d_mountpoint(new_dentry))
-		error = -EBUSY;
-	else
-		error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry);
-	if (!error) {
-		if (target)
-			dont_mount(new_dentry);
-		if (!(old_dir->i_sb->s_type->fs_flags & FS_RENAME_DOES_D_MOVE))
-			d_move(old_dentry, new_dentry);
-	}
+		goto out;
+
+	error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry);
+	if (error)
+		goto out;
+
+	if (target)
+		dont_mount(new_dentry);
+	if (!(old_dir->i_sb->s_type->fs_flags & FS_RENAME_DOES_D_MOVE))
+		d_move(old_dentry, new_dentry);
+out:
 	if (target)
 		mutex_unlock(&target->i_mutex);
 	dput(new_dentry);