cxl: Destroy cxl_adapter_idr on module_exit

Destroy cxl_adapter_idr on module exit, reclaiming the allocated memory.

This was detected by the following semantic patch (written by Luis Rodriguez
<[e-mail]>)
<SmPL>
@ defines_module_init @
declarer name module_init, module_exit;
declarer name DEFINE_IDR;
identifier init;
@@

module_init(init);

@ defines_module_exit @
identifier exit;
@@

module_exit(exit);

@ declares_idr depends on defines_module_init && defines_module_exit @
identifier idr;
@@

DEFINE_IDR(idr);

@ on_exit_calls_destroy depends on declares_idr && defines_module_exit @
identifier declares_idr.idr, defines_module_exit.exit;
@@

exit(void)
{
...
idr_destroy(&idr);
...
}

@ missing_module_idr_destroy depends on declares_idr && defines_module_exit && !on_exit_calls_destroy @
identifier declares_idr.idr, defines_module_exit.exit;
@@

exit(void)
{
...
+idr_destroy(&idr);
}
</SmPL>

Signed-off-by: Johannes Thumshirn <[e-mail]>
Acked-by: Ian Munsie <[e-mail]>
Signed-off-by: Michael Ellerman <[e-mail]>

drivers/misc/cxl/main.c

···
 	cxl_debugfs_exit();
 	cxl_file_exit();
 	unregister_cxl_calls(&cxl_calls);
+	idr_destroy(&cxl_adapter_idr);
 }
 
 module_init(init_cxl);