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fff4ef17a9
tty_operations::chars_in_buffer is another hook which is expected to return values >= 0. So make it explicit by the return type too -- use unsigned int. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com> Acked-by: David Sterba <dsterba@suse.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Cc: Jens Taprogge <jens.taprogge@taprogge.org> Cc: Karsten Keil <isdn@linux-pingi.de> 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 Kosina <jikos@kernel.org> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> 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> Link: https://lore.kernel.org/r/20210505091928.22010-27-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
98 lines
3.1 KiB
C
98 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
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*/
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#ifndef __LINE_H__
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#define __LINE_H__
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#include <linux/list.h>
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#include <linux/workqueue.h>
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#include <linux/tty.h>
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#include <linux/interrupt.h>
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#include <linux/spinlock.h>
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#include <linux/mutex.h>
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#include "chan_user.h"
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#include "mconsole_kern.h"
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/* There's only two modifiable fields in this - .mc.list and .driver */
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struct line_driver {
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const char *name;
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const char *device_name;
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const short major;
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const short minor_start;
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const short type;
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const short subtype;
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const int read_irq;
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const char *read_irq_name;
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const int write_irq;
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const char *write_irq_name;
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struct mc_device mc;
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struct tty_driver *driver;
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};
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struct line {
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struct tty_port port;
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int valid;
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char *init_str;
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struct list_head chan_list;
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struct chan *chan_in, *chan_out;
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/*This lock is actually, mostly, local to*/
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spinlock_t lock;
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int throttled;
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/* Yes, this is a real circular buffer.
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* XXX: And this should become a struct kfifo!
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*
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* buffer points to a buffer allocated on demand, of length
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* LINE_BUFSIZE, head to the start of the ring, tail to the end.*/
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char *buffer;
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char *head;
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char *tail;
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int sigio;
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struct delayed_work task;
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const struct line_driver *driver;
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};
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extern void line_close(struct tty_struct *tty, struct file * filp);
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extern int line_open(struct tty_struct *tty, struct file *filp);
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extern int line_install(struct tty_driver *driver, struct tty_struct *tty,
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struct line *line);
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extern void line_cleanup(struct tty_struct *tty);
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extern void line_hangup(struct tty_struct *tty);
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extern int line_setup(char **conf, unsigned nlines, char **def,
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char *init, char *name);
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extern int line_write(struct tty_struct *tty, const unsigned char *buf,
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int len);
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extern void line_set_termios(struct tty_struct *tty, struct ktermios * old);
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extern unsigned int line_chars_in_buffer(struct tty_struct *tty);
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extern void line_flush_buffer(struct tty_struct *tty);
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extern void line_flush_chars(struct tty_struct *tty);
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extern unsigned int line_write_room(struct tty_struct *tty);
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extern void line_throttle(struct tty_struct *tty);
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extern void line_unthrottle(struct tty_struct *tty);
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extern char *add_xterm_umid(char *base);
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extern int line_setup_irq(int fd, int input, int output, struct line *line,
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void *data);
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extern void line_close_chan(struct line *line);
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extern int register_lines(struct line_driver *line_driver,
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const struct tty_operations *driver,
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struct line *lines, int nlines);
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extern int setup_one_line(struct line *lines, int n, char *init,
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const struct chan_opts *opts, char **error_out);
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extern void close_lines(struct line *lines, int nlines);
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extern int line_config(struct line *lines, unsigned int sizeof_lines,
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char *str, const struct chan_opts *opts,
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char **error_out);
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extern int line_id(char **str, int *start_out, int *end_out);
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extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n,
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char **error_out);
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extern int line_get_config(char *dev, struct line *lines,
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unsigned int sizeof_lines, char *str,
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int size, char **error_out);
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#endif
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