summaryrefslogtreecommitdiff
path: root/drivers/isdn/gigaset/interface.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/isdn/gigaset/interface.c')
-rw-r--r--drivers/isdn/gigaset/interface.c4
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,