TTY: hso, free tty_driver
Do not leak tty_driver structure on each module removal. Also do
proper frees in fail paths of module_init.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Jan Dumon <j.dumon@option.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index abe47ad..cdc589e 100644
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -3332,7 +3332,7 @@
if (result) {
printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
__func__, result);
- return result;
+ goto err_free_tty;
}
/* register this module as an usb driver */
@@ -3340,13 +3340,16 @@
if (result) {
printk(KERN_ERR "Could not register hso driver? error: %d\n",
result);
- /* cleanup serial interface */
- tty_unregister_driver(tty_drv);
- return result;
+ goto err_unreg_tty;
}
/* done */
return 0;
+err_unreg_tty:
+ tty_unregister_driver(tty_drv);
+err_free_tty:
+ put_tty_driver(tty_drv);
+ return result;
}
static void __exit hso_exit(void)
@@ -3354,6 +3357,7 @@
printk(KERN_INFO "hso: unloaded\n");
tty_unregister_driver(tty_drv);
+ put_tty_driver(tty_drv);
/* deregister the usb driver */
usb_deregister(&hso_driver);
}