Merge following commit from 5.5:

commit ef92aaf9ece92c873ae0f3448ab2274c958ba3fe
Author: Jan Lindström <jan.lindstrom@mariadb.com>
Date:   Wed Jun 22 22:37:28 2016 +0300

    MDEV-10083: Orphan ibd file when playing with foreign keys

    Analysis: row_drop_table_for_mysql did not allow dropping
    referenced table even in case when actual creating of the
    referenced table was not successfull if foreign_key_checks=1.

    Fix: Allow dropping referenced table even if foreign_key_checks=1
    if actual table create returned error.

2 files changed, 204 insertions, 0 deletions

diff --git a/mysql-test/suite/innodb/r/innodb-fkcheck.result b/mysql-test/suite/innodb/r/innodb-fkcheck.result
new file mode 100644
index 00000000000..c6beabb0f50
--- /dev/null
+++ b/mysql-test/suite/innodb/r/innodb-fkcheck.result
@@ -0,0 +1,89 @@
+set global innodb_file_per_table = 1;
+drop table if exists b;
+drop database if exists bug_fk;
+create database bug_fk;
+use bug_fk;
+CREATE TABLE b (
+b int unsigned NOT NULL,
+d1 datetime NOT NULL,
+PRIMARY KEY (b,d1)
+) ENGINE=InnoDB;
+CREATE TABLE c (
+b int unsigned NOT NULL,
+d1 datetime NOT NULL,
+d2 datetime NOT NULL,
+PRIMARY KEY (b,d1),
+CONSTRAINT b_fk FOREIGN KEY (b) REFERENCES b (b)
+) ENGINE=InnoDB;
+show warnings;
+Level	Code	Message
+set foreign_key_checks = 0;
+DROP TABLE IF EXISTS b;
+show create table c;
+Table	Create Table
+c	CREATE TABLE `c` (
+  `b` int(10) unsigned NOT NULL,
+  `d1` datetime NOT NULL,
+  `d2` datetime NOT NULL,
+  PRIMARY KEY (`b`,`d1`),
+  CONSTRAINT `b_fk` FOREIGN KEY (`b`) REFERENCES `b` (`b`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+CREATE TABLE b (
+b bigint unsigned NOT NULL,
+d1 date NOT NULL,
+PRIMARY KEY (b,d1)
+) ENGINE=InnoDB;
+ERROR HY000: Can't create table `bug_fk`.`b` (errno: 150 "Foreign key constraint is incorrectly formed")
+show warnings;
+Level	Code	Message
+Error	1005	Can't create table `bug_fk`.`b` (errno: 150 "Foreign key constraint is incorrectly formed")
+Warning	1215	Cannot add foreign key constraint
+DROP TABLE IF EXISTS d;
+Warnings:
+Note	1051	Unknown table 'bug_fk.d'
+CREATE TABLE d (
+b bigint unsigned NOT NULL,
+d1 date NOT NULL,
+PRIMARY KEY (b,d1),
+CONSTRAINT bd_fk FOREIGN KEY (b) REFERENCES b (b)
+) ENGINE=InnoDB;
+show warnings;
+Level	Code	Message
+set foreign_key_checks = 1;
+show create table c;
+Table	Create Table
+c	CREATE TABLE `c` (
+  `b` int(10) unsigned NOT NULL,
+  `d1` datetime NOT NULL,
+  `d2` datetime NOT NULL,
+  PRIMARY KEY (`b`,`d1`),
+  CONSTRAINT `b_fk` FOREIGN KEY (`b`) REFERENCES `b` (`b`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+show create table d;
+Table	Create Table
+d	CREATE TABLE `d` (
+  `b` bigint(20) unsigned NOT NULL,
+  `d1` date NOT NULL,
+  PRIMARY KEY (`b`,`d1`),
+  CONSTRAINT `bd_fk` FOREIGN KEY (`b`) REFERENCES `b` (`b`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1
+CREATE TABLE b (
+b bigint unsigned NOT NULL,
+d1 date NOT NULL,
+PRIMARY KEY (b,d1)
+) ENGINE=InnoDB;
+ERROR HY000: Can't create table `bug_fk`.`b` (errno: 150 "Foreign key constraint is incorrectly formed")
+show warnings;
+Level	Code	Message
+Error	1005	Can't create table `bug_fk`.`b` (errno: 150 "Foreign key constraint is incorrectly formed")
+Warning	1215	Cannot add foreign key constraint
+set foreign_key_checks=0;
+drop table c;
+drop table d;
+create table b(id int) engine=innodb;
+show warnings;
+Level	Code	Message
+b.frm
+b.ibd
+drop table if exists b;
+drop database if exists bug_fk;
diff --git a/mysql-test/suite/innodb/t/innodb-fkcheck.test b/mysql-test/suite/innodb/t/innodb-fkcheck.test
new file mode 100644
index 00000000000..51e36ae6984
--- /dev/null
+++ b/mysql-test/suite/innodb/t/innodb-fkcheck.test
@@ -0,0 +1,115 @@
+--source include/have_innodb.inc
+
+#
+# MDEV-10083: Orphan ibd file when playing with foreign keys
+#
+--disable_query_log
+SET @start_global_fpt = @@global.innodb_file_per_table;
+SET @start_global_fkc = @@global.foreign_key_checks;
+--enable_query_log
+
+set global innodb_file_per_table = 1;
+
+--disable_warnings
+drop table if exists b;
+drop database if exists bug_fk;
+--enable_warnings
+
+let $MYSQLD_DATADIR = `select @@datadir`;
+
+create database bug_fk;
+use bug_fk;
+
+CREATE TABLE b (
+  b int unsigned NOT NULL,
+  d1 datetime NOT NULL,
+  PRIMARY KEY (b,d1)
+) ENGINE=InnoDB;
+
+CREATE TABLE c (
+  b int unsigned NOT NULL,
+  d1 datetime NOT NULL,
+  d2 datetime NOT NULL,
+  PRIMARY KEY (b,d1),
+  CONSTRAINT b_fk FOREIGN KEY (b) REFERENCES b (b)
+) ENGINE=InnoDB;
+
+show warnings;
+
+set foreign_key_checks = 0;
+
+DROP TABLE IF EXISTS b;
+
+show create table c;
+
+#
+# Note that column b has different type in parent table
+#
+--error 1005
+CREATE TABLE b (
+  b bigint unsigned NOT NULL,
+  d1 date NOT NULL,
+  PRIMARY KEY (b,d1)
+) ENGINE=InnoDB;
+
+show warnings;
+
+DROP TABLE IF EXISTS d;
+
+CREATE TABLE d (
+  b bigint unsigned NOT NULL,
+  d1 date NOT NULL,
+  PRIMARY KEY (b,d1),
+  CONSTRAINT bd_fk FOREIGN KEY (b) REFERENCES b (b)
+) ENGINE=InnoDB;
+
+show warnings; 
+
+set foreign_key_checks = 1;
+
+show create table c;
+show create table d;
+
+#
+# Table c column b used on foreign key has different type
+# compared referenced column b in table b, but this
+# create still produced b.ibd file. This is because
+# we row_drop_table_for_mysql was called and referenced
+# table is not allowed to be dropped even in case
+# when actual create is not successfull.
+#
+--error 1005
+CREATE TABLE b (
+  b bigint unsigned NOT NULL,
+  d1 date NOT NULL,
+  PRIMARY KEY (b,d1)
+) ENGINE=InnoDB;
+
+show warnings;
+
+--list_files $MYSQLD_DATADIR/bug_fk b*
+
+set foreign_key_checks=0;
+
+drop table c;
+drop table d;
+
+--list_files $MYSQLD_DATADIR/bug_fk b*
+
+create table b(id int) engine=innodb;
+show warnings;
+
+--list_files $MYSQLD_DATADIR/bug_fk b*
+
+#
+# Cleanup
+#
+--disable_query_log
+SET @@global.innodb_file_per_table = @start_global_fpt;
+SET @@global.foreign_key_checks = @start_global_fkc;
+--enable_query_log
+
+--disable_warnings
+drop table if exists b;
+drop database if exists bug_fk;
+--enable_warnings