xfs: don't call xfs_file_open from xfs_dir_open

Directories do not support direct I/O and thus no non-blocking direct
I/O either.  Open code the shutdown check and call to generic_file_open
instead.

Signed-off-by: Christoph Hellwig <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Darrick J. Wong <[email protected]>
Signed-off-by: Christian Brauner <[email protected]>

Author: Christoph Hellwig

fs/xfs/xfs_file.c

@@ -1243,7 +1243,9 @@ xfs_dir_open(
 	unsigned int	mode;
 	int		error;
 
-	error = xfs_file_open(inode, file);
+	if (xfs_is_shutdown(ip->i_mount))
+		return -EIO;
+	error = generic_file_open(inode, file);
 	if (error)
 		return error;