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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>
hifive-unleashed-5.1
Jiri Slaby 2012-06-04 13:35:37 +02:00 committed by Greg Kroah-Hartman
parent 04831dc154
commit 057eb856ed
2 changed files with 12 additions and 0 deletions
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9
drivers/tty/tty_port.c
View File

@ -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() */

3
include/linux/tty.h
View File

@ -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);