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Commit 057eb856 authored Jun 04, 2012 by Jiri Slaby Committed by Greg Kroah-Hartman Jun 13, 2012

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>

parent 04831dc1

drivers/tty/tty_port.c

+9 −0

Original line number	Original line	Diff line number	Diff line
	@@ -33,6 +33,15 @@ void tty_port_init(struct tty_port *port)
	}		}
	EXPORT_SYMBOL(tty_port_init);		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)		int tty_port_alloc_xmit_buf(struct tty_port *port)
	{		{
	/* We may sleep in get_zeroed_page() */		/* We may sleep in get_zeroed_page() */

include/linux/tty.h

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -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))		#define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock))

	extern void tty_port_init(struct tty_port *port);		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 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_free_xmit_buf(struct tty_port *port);
	extern void tty_port_put(struct tty_port *port);		extern void tty_port_put(struct tty_port *port);