simplify xfs_find_handle() a bit

XFS_IOC_FD_TO_HANDLE can grab a reference to copied ->f_path and
let the file go; results in simpler control flow - cleanup is
the same for both "by descriptor" and "by pathname" cases.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

Author: Al Viro

fs/xfs/xfs_handle.c

@@ -85,22 +85,23 @@ xfs_find_handle(
 	int			hsize;
 	xfs_handle_t		handle;
 	struct inode		*inode;
-	struct fd		f = EMPTY_FD;
 	struct path		path;
 	int			error;
 	struct xfs_inode	*ip;
 
 	if (cmd == XFS_IOC_FD_TO_HANDLE) {
-		f = fdget(hreq->fd);
-		if (!fd_file(f))
+		CLASS(fd, f)(hreq->fd);
+
+		if (fd_empty(f))
 			return -EBADF;
-		inode = file_inode(fd_file(f));
+		path = fd_file(f)->f_path;
+		path_get(&path);
 	} else {
 		error = user_path_at(AT_FDCWD, hreq->path, 0, &path);
 		if (error)
 			return error;
-		inode = d_inode(path.dentry);
 	}
+	inode = d_inode(path.dentry);
 	ip = XFS_I(inode);
 
 	/*
@@ -134,10 +135,7 @@ xfs_find_handle(
 	error = 0;
 
  out_put:
-	if (cmd == XFS_IOC_FD_TO_HANDLE)
-		fdput(f);
-	else
-		path_put(&path);
+	path_put(&path);
 	return error;
 }