MDEV-28484 InnoDB encryption key rotation is not being marked completed

fil_crypt_flush_space(): Correct a condition that was refactored
incorrectly in commit aaef2e1d

mysql-test/suite/encryption/r/innodb_encrypt_key_rotation_age.result

@@ -67,13 +67,13 @@ test/t2
 test/t3
 SELECT NAME FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION = 0;
 NAME
-innodb_system
-mysql/innodb_table_stats
-mysql/innodb_index_stats
-mysql/transaction_registry
 test/t4
 SELECT NAME FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION <> 0;
 NAME
+innodb_system
+mysql/innodb_index_stats
+mysql/innodb_table_stats
+mysql/transaction_registry
 test/t1
 test/t2
 test/t3

mysql-test/suite/encryption/r/innodb_encryption.result

@@ -66,7 +66,7 @@ innodb_encryption_threads	0
 SELECT NAME FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION <> 0
 AND NAME NOT LIKE 'innodb_undo%' AND NAME NOT LIKE 'mysql/innodb_%_stats' AND NAME NOT LIKE 'mysql/transaction_registry';
 NAME
+innodb_system
 SELECT NAME FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION = 0
 AND NAME NOT LIKE 'innodb_undo%' AND NAME NOT LIKE 'mysql/innodb_%_stats' AND NAME NOT LIKE 'mysql/transaction_registry';
 NAME
-innodb_system

mysql-test/suite/encryption/t/innodb_encryption.test

@@ -90,9 +90,6 @@ AND NAME NOT LIKE 'innodb_undo%' AND NAME NOT LIKE 'mysql/innodb_%_stats' AND NA
 
 SHOW VARIABLES LIKE 'innodb_encrypt%';
 
---let $wait_condition=SELECT COUNT(*) >= $tables_count FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION = 0;
---source include/wait_condition.inc
-
 --sorted_result
 SELECT NAME FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION <> 0
 AND NAME NOT LIKE 'innodb_undo%' AND NAME NOT LIKE 'mysql/innodb_%_stats' AND NAME NOT LIKE 'mysql/transaction_registry';

storage/innobase/fil/fil0crypt.cc

 /*****************************************************************************
 Copyright (C) 2013, 2015, Google Inc. All Rights Reserved.
-Copyright (c) 2014, 2021, MariaDB Corporation.
+Copyright (c) 2014, 2022, MariaDB Corporation.
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free Software
@@ -1973,7 +1973,7 @@ fil_crypt_flush_space(
 	if (buf_block_t* block = buf_page_get_gen(
 		    page_id_t(space->id, 0), space->zip_size(),
 		    RW_X_LATCH, NULL, BUF_GET_POSSIBLY_FREED, &mtr)) {
-		if (block->page.is_freed()) {
+		if (!block->page.is_freed()) {
 			mtr.set_named_space(space);
 			crypt_data->write_page0(block, &mtr);
 		}