Commit d23f47d4 authored by Johannes Thumshirn's avatar Johannes Thumshirn Committed by Johan Hovold

USB: serial: Destroy serial_minors IDR on module exit

Destroy serial_minors IDR on module exit, reclaiming the allocated memory.

This was detected by the following semantic patch (written by Luis
Rodriguez <mcgrof@suse.com>)

<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: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Cc: stable <stable@vger.kernel.org>	# v3.11
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
parent f98a7aa8
...@@ -1306,6 +1306,7 @@ static void __exit usb_serial_exit(void) ...@@ -1306,6 +1306,7 @@ static void __exit usb_serial_exit(void)
tty_unregister_driver(usb_serial_tty_driver); tty_unregister_driver(usb_serial_tty_driver);
put_tty_driver(usb_serial_tty_driver); put_tty_driver(usb_serial_tty_driver);
bus_unregister(&usb_serial_bus_type); bus_unregister(&usb_serial_bus_type);
idr_destroy(&serial_minors);
} }
......
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