diff options
Diffstat (limited to 'drivers/isdn/gigaset/interface.c')
| -rw-r--r-- | drivers/isdn/gigaset/interface.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/isdn/gigaset/interface.c b/drivers/isdn/gigaset/interface.c index f4731c9984f6..af195b07c191 100644 --- a/drivers/isdn/gigaset/interface.c +++ b/drivers/isdn/gigaset/interface.c @@ -161,7 +161,7 @@ static int if_open(struct tty_struct *tty, struct file *filp) tty->driver_data = NULL; cs = gigaset_get_cs_by_tty(tty); - if (!cs) + if (!cs || !try_module_get(cs->driver->owner)) return -ENODEV; if (mutex_lock_interruptible(&cs->mutex)) @@ -207,6 +207,8 @@ static void if_close(struct tty_struct *tty, struct file *filp) } mutex_unlock(&cs->mutex); + + module_put(cs->driver->owner); } static int if_ioctl(struct tty_struct *tty, struct file *file, |