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    Subject[PATCH 23/24] TTY: add tty_port_register_device helper
    Date
    This will automatically assign tty_port to tty_driver's port array for
    later recall in tty_init_dev. This is intended to be called instead of
    tty_register_device.

    Signed-off-by: Jiri Slaby <jslaby@suse.cz>
    ---
    drivers/tty/tty_port.c | 9 +++++++++
    include/linux/tty.h | 3 +++
    2 files changed, 12 insertions(+)

    diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
    index 1ac8abf..4e9d2b2 100644
    --- a/drivers/tty/tty_port.c
    +++ b/drivers/tty/tty_port.c
    @@ -33,6 +33,15 @@ void tty_port_init(struct tty_port *port)
    }
    EXPORT_SYMBOL(tty_port_init);

    +struct device *tty_port_register_device(struct tty_port *port,
    + struct tty_driver *driver, unsigned index,
    + struct device *device)
    +{
    + driver->ports[index] = port;
    + return tty_register_device(driver, index, device);
    +}
    +EXPORT_SYMBOL_GPL(tty_port_register_device);
    +
    int tty_port_alloc_xmit_buf(struct tty_port *port)
    {
    /* We may sleep in get_zeroed_page() */
    diff --git a/include/linux/tty.h b/include/linux/tty.h
    index 45ef71d..40b18d7 100644
    --- a/include/linux/tty.h
    +++ b/include/linux/tty.h
    @@ -497,6 +497,9 @@ extern int tty_write_lock(struct tty_struct *tty, int ndelay);
    #define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock))

    extern void tty_port_init(struct tty_port *port);
    +extern struct device *tty_port_register_device(struct tty_port *port,
    + struct tty_driver *driver, unsigned index,
    + struct device *device);
    extern int tty_port_alloc_xmit_buf(struct tty_port *port);
    extern void tty_port_free_xmit_buf(struct tty_port *port);
    extern void tty_port_put(struct tty_port *port);
    --
    1.7.10.3



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