diff options
Diffstat (limited to 'drivers/tty/tty_port.c')
| -rw-r--r-- | drivers/tty/tty_port.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index c2f0592bcb2c..96302f4c7079 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -34,6 +34,26 @@ void tty_port_init(struct tty_port *port) EXPORT_SYMBOL(tty_port_init); /** + * tty_port_link_device - link tty and tty_port + * @port: tty_port of the device + * @driver: tty_driver for this device + * @index: index of the tty + * + * Provide the tty layer wit ha link from a tty (specified by @index) to a + * tty_port (@port). Use this only if neither tty_port_register_device nor + * tty_port_install is used in the driver. If used, this has to be called before + * tty_register_driver. + */ +void tty_port_link_device(struct tty_port *port, + struct tty_driver *driver, unsigned index) +{ + if (WARN_ON(index >= driver->num)) + return; + driver->ports[index] = port; +} +EXPORT_SYMBOL_GPL(tty_port_link_device); + +/** * tty_port_register_device - register tty device * @port: tty_port of the device * @driver: tty_driver for this device @@ -48,7 +68,7 @@ struct device *tty_port_register_device(struct tty_port *port, struct tty_driver *driver, unsigned index, struct device *device) { - driver->ports[index] = port; + tty_port_link_device(port, driver, index); return tty_register_device(driver, index, device); } EXPORT_SYMBOL_GPL(tty_port_register_device); |