| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.1 109/267] USB: serial: Destroy serial_minors IDR on module exit | Date | Fri, 31 Jul 2015 12:39:20 -0700 |
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4.1-stable review patch. If anyone has any objections, please let me know.
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From: Johannes Thumshirn <jthumshirn@suse.de>
commit d23f47d4927fd2f61b3a754d83c7bcec215b5cfe upstream.
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: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/usb/serial/usb-serial.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -1306,6 +1306,7 @@ static void __exit usb_serial_exit(void) tty_unregister_driver(usb_serial_tty_driver); put_tty_driver(usb_serial_tty_driver); bus_unregister(&usb_serial_bus_type); + idr_destroy(&serial_minors); }
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