[PATCH] ACL version mismatch error code fix

From: Andreas Gruenbacher <agruen@suse.de>

Return EOPNOTSUPP rather than EINVAL when we discover an ACL version
mismatch.

fs/xattr_acl.c

@@ -29,7 +29,7 @@ posix_acl_from_xattr(const void *value, size_t size)
 	if (size < sizeof(posix_acl_xattr_header))
 		 return ERR_PTR(-EINVAL);
 	if (header->a_version != cpu_to_le32(POSIX_ACL_XATTR_VERSION))
-		return ERR_PTR(-EINVAL);
+		return ERR_PTR(-EOPNOTSUPP);
 
 	count = posix_acl_xattr_count(size);
 	if (count < 0)