if (!cs || !try_module_get(cs->driver->owner))
return -ENODEV;
- if (mutex_lock_interruptible(&cs->mutex))
+ if (mutex_lock_interruptible(&cs->mutex)) {
+ module_put(cs->driver->owner);
return -ERESTARTSYS;
+ }
tty->driver_data = cs;
++cs->open_count;