my_errno can not be set to EE_ error numbers

EE_ numbers occupy the same range as OS Exxx errors and
my_errno is generally for OS errors. And for HA_ERR_ handler errors
which occupy a different range, so can be freely mixed with OS errors.

mysys/mf_iocache.c

@@ -88,7 +88,7 @@ static inline my_bool tmp_file_track(IO_CACHE *info, ulonglong file_size)
                                          MY_TRACK_WITH_LIMIT))))
       {
         if (info->myflags & MY_WME)
-          my_error(my_errno, MYF(0));
+          my_error(error, MYF(0));
         info->error= -1;
         return 1;
       }

sql/mysqld.cc

@@ -3804,7 +3804,7 @@ static int temp_file_size_cb_func(struct tmp_file_tracking *track,
           global_max_tmp_space_usage)
       {
         global_tmp_space_used-= size_change;
-        error= my_errno= EE_GLOBAL_TMP_SPACE_FULL;
+        error= EE_GLOBAL_TMP_SPACE_FULL;
         goto exit;
       }
       if (thd->status_var.tmp_space_used + size_change >
@@ -3812,7 +3812,7 @@ static int temp_file_size_cb_func(struct tmp_file_tracking *track,
           thd->variables.max_tmp_space_usage)
       {
         global_tmp_space_used-= size_change;
-        error= my_errno= EE_LOCAL_TMP_SPACE_FULL;
+        error= EE_LOCAL_TMP_SPACE_FULL;
         goto exit;
       }
       set_if_bigger(global_status_var.max_tmp_space_used, cached_space);

storage/maria/ma_info.c

@@ -227,13 +227,13 @@ void _ma_set_fatal_error_with_share(MARIA_SHARE *share, int error)
 int _ma_update_tmp_file_size(struct tmp_file_tracking *track,
                              ulonglong file_size)
 {
+  int err;
   if (track->file_size != file_size)
   {
     track->file_size= file_size;
-    if (update_tmp_file_size(track, 0))
+    if ((err= update_tmp_file_size(track, 0)))
     {
-      my_errno= (HA_ERR_LOCAL_TMP_SPACE_FULL +
-                 (my_errno - EE_LOCAL_TMP_SPACE_FULL));
+      my_errno= HA_ERR_LOCAL_TMP_SPACE_FULL + (err - EE_LOCAL_TMP_SPACE_FULL);
       return 1;
     }
   }