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TTY: add tty_port_register_device helper
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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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2 changed files with 12 additions and 0 deletions
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@ -33,6 +33,15 @@ void tty_port_init(struct tty_port *port)
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}
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EXPORT_SYMBOL(tty_port_init);
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struct device *tty_port_register_device(struct tty_port *port,
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struct tty_driver *driver, unsigned index,
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struct device *device)
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{
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driver->ports[index] = port;
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return tty_register_device(driver, index, device);
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}
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EXPORT_SYMBOL_GPL(tty_port_register_device);
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int tty_port_alloc_xmit_buf(struct tty_port *port)
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{
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/* We may sleep in get_zeroed_page() */
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@ -497,6 +497,9 @@ extern int tty_write_lock(struct tty_struct *tty, int ndelay);
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#define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock))
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extern void tty_port_init(struct tty_port *port);
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extern struct device *tty_port_register_device(struct tty_port *port,
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struct tty_driver *driver, unsigned index,
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struct device *device);
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extern int tty_port_alloc_xmit_buf(struct tty_port *port);
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extern void tty_port_free_xmit_buf(struct tty_port *port);
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extern void tty_port_put(struct tty_port *port);
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