mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-29 23:53:32 +00:00
9f90a4ddef
put_tty_driver() is an alias for tty_driver_kref_put(). There is no need for two exported identical functions, therefore switch all users of old put_tty_driver() to new tty_driver_kref_put() and remove the former for good. Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com> Cc: Chris Zankel <chris@zankel.net> Cc: Max Filippov <jcmvbkbc@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Cc: Jens Taprogge <jens.taprogge@taprogge.org> Cc: Karsten Keil <isdn@linux-pingi.de> Cc: Scott Branden <scott.branden@broadcom.com> Cc: Ulf Hansson <ulf.hansson@linaro.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: David Lin <dtwlin@gmail.com> Cc: Johan Hovold <johan@kernel.org> Cc: Alex Elder <elder@kernel.org> Cc: Jiri Slaby <jirislaby@kernel.org> Cc: Laurentiu Tudor <laurentiu.tudor@nxp.com> Cc: Jiri Kosina <jikos@kernel.org> Cc: David Sterba <dsterba@suse.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Pengutronix Kernel Team <kernel@pengutronix.de> Cc: Fabio Estevam <festevam@gmail.com> Cc: NXP Linux Team <linux-imx@nxp.com> Cc: Oliver Neukum <oneukum@suse.com> Cc: Felipe Balbi <balbi@kernel.org> Cc: Mathias Nyman <mathias.nyman@intel.com> Cc: Marcel Holtmann <marcel@holtmann.org> Cc: Johan Hedberg <johan.hedberg@gmail.com> Cc: Luiz Augusto von Dentz <luiz.dentz@gmail.com> Acked-by: Alex Elder <elder@linaro.org> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Max Filippov <jcmvbkbc@gmail.com> Acked-by: David Sterba <dsterba@suse.com> Acked-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com> Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20210723074317.32690-8-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
109 lines
2.3 KiB
C
109 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 2019 Axis Communications AB
|
|
*
|
|
* Based on ttyprintk.c:
|
|
* Copyright (C) 2010 Samo Pogacnik
|
|
*/
|
|
|
|
#include <linux/console.h>
|
|
#include <linux/module.h>
|
|
#include <linux/tty.h>
|
|
|
|
static const struct tty_port_operations ttynull_port_ops;
|
|
static struct tty_driver *ttynull_driver;
|
|
static struct tty_port ttynull_port;
|
|
|
|
static int ttynull_open(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
return tty_port_open(&ttynull_port, tty, filp);
|
|
}
|
|
|
|
static void ttynull_close(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
tty_port_close(&ttynull_port, tty, filp);
|
|
}
|
|
|
|
static void ttynull_hangup(struct tty_struct *tty)
|
|
{
|
|
tty_port_hangup(&ttynull_port);
|
|
}
|
|
|
|
static int ttynull_write(struct tty_struct *tty, const unsigned char *buf,
|
|
int count)
|
|
{
|
|
return count;
|
|
}
|
|
|
|
static unsigned int ttynull_write_room(struct tty_struct *tty)
|
|
{
|
|
return 65536;
|
|
}
|
|
|
|
static const struct tty_operations ttynull_ops = {
|
|
.open = ttynull_open,
|
|
.close = ttynull_close,
|
|
.hangup = ttynull_hangup,
|
|
.write = ttynull_write,
|
|
.write_room = ttynull_write_room,
|
|
};
|
|
|
|
static struct tty_driver *ttynull_device(struct console *c, int *index)
|
|
{
|
|
*index = 0;
|
|
return ttynull_driver;
|
|
}
|
|
|
|
static struct console ttynull_console = {
|
|
.name = "ttynull",
|
|
.device = ttynull_device,
|
|
};
|
|
|
|
static int __init ttynull_init(void)
|
|
{
|
|
struct tty_driver *driver;
|
|
int ret;
|
|
|
|
driver = tty_alloc_driver(1,
|
|
TTY_DRIVER_RESET_TERMIOS |
|
|
TTY_DRIVER_REAL_RAW |
|
|
TTY_DRIVER_UNNUMBERED_NODE);
|
|
if (IS_ERR(driver))
|
|
return PTR_ERR(driver);
|
|
|
|
tty_port_init(&ttynull_port);
|
|
ttynull_port.ops = &ttynull_port_ops;
|
|
|
|
driver->driver_name = "ttynull";
|
|
driver->name = "ttynull";
|
|
driver->type = TTY_DRIVER_TYPE_CONSOLE;
|
|
driver->init_termios = tty_std_termios;
|
|
driver->init_termios.c_oflag = OPOST | OCRNL | ONOCR | ONLRET;
|
|
tty_set_operations(driver, &ttynull_ops);
|
|
tty_port_link_device(&ttynull_port, driver, 0);
|
|
|
|
ret = tty_register_driver(driver);
|
|
if (ret < 0) {
|
|
tty_driver_kref_put(driver);
|
|
tty_port_destroy(&ttynull_port);
|
|
return ret;
|
|
}
|
|
|
|
ttynull_driver = driver;
|
|
register_console(&ttynull_console);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit ttynull_exit(void)
|
|
{
|
|
unregister_console(&ttynull_console);
|
|
tty_unregister_driver(ttynull_driver);
|
|
tty_driver_kref_put(ttynull_driver);
|
|
tty_port_destroy(&ttynull_port);
|
|
}
|
|
|
|
module_init(ttynull_init);
|
|
module_exit(ttynull_exit);
|
|
|
|
MODULE_LICENSE("GPL v2");
|