Fix to return -EINVAL from the option parse error handling
case instead of 0, as done elsewhere in this function.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
                switch (optval) {
                        case 'u':
                                data->uid = make_kuid(current_user_ns(), optint);
-                               if (!uid_valid(data->uid))
+                               if (!uid_valid(data->uid)) {
+                                       ret = -EINVAL;
                                        goto err;
+                               }
                                break;
                        case 'g':
                                data->gid = make_kgid(current_user_ns(), optint);
-                               if (!gid_valid(data->gid))
+                               if (!gid_valid(data->gid)) {
+                                       ret = -EINVAL;
                                        goto err;
+                               }
                                break;
                        case 'o':
                                data->mounted_uid = make_kuid(current_user_ns(), optint);
-                               if (!uid_valid(data->mounted_uid))
+                               if (!uid_valid(data->mounted_uid)) {
+                                       ret = -EINVAL;
                                        goto err;
+                               }
                                break;
                        case 'm':
                                data->file_mode = optint;