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Date: Sat, 9 Jan 2016 21:13:48 -0800
From: Peter Hurley <peter@...leysoftware.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Jiri Slaby <jslaby@...e.cz>, linux-kernel@...r.kernel.org,
Peter Hurley <peter@...leysoftware.com>
Subject: [PATCH v2 05/10] tty: Fix tty_init_termios() declaration
tty_init_termios() never returns an error; re-declare as void. Remove
unnecessary error handling from callers. Remove extern declarations
of tty_free_termios() and free_tty_struct() and re-declare in file
scope.
Signed-off-by: Peter Hurley <peter@...leysoftware.com>
---
drivers/tty/pty.c | 15 +++------------
drivers/tty/tty_io.c | 13 ++++---------
drivers/usb/serial/console.c | 6 +-----
include/linux/tty.h | 4 +---
4 files changed, 9 insertions(+), 29 deletions(-)
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 8cbe802..7e885a2 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -406,13 +406,8 @@ static int pty_common_install(struct tty_driver *driver, struct tty_struct *tty,
if (legacy) {
/* We always use new tty termios data so we can do this
the easy way .. */
- retval = tty_init_termios(tty);
- if (retval)
- goto err_free_tty;
-
- retval = tty_init_termios(o_tty);
- if (retval)
- goto err_free_termios;
+ tty_init_termios(tty);
+ tty_init_termios(o_tty);
driver->other->ttys[idx] = o_tty;
driver->ttys[idx] = tty;
@@ -444,11 +439,7 @@ static int pty_common_install(struct tty_driver *driver, struct tty_struct *tty,
tty->count++;
o_tty->count++;
return 0;
-err_free_termios:
- if (legacy)
- tty_free_termios(tty);
-err_free_tty:
- free_tty_struct(o_tty);
+
err_put_module:
module_put(driver->other->owner);
err:
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 17a3ffb..0894293 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -169,7 +169,7 @@ static void release_tty(struct tty_struct *tty, int idx);
* Locking: none. Must be called after tty is definitely unused
*/
-void free_tty_struct(struct tty_struct *tty)
+static void free_tty_struct(struct tty_struct *tty)
{
tty_ldisc_deinit(tty);
put_device(tty->dev);
@@ -1381,7 +1381,7 @@ static struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver,
* the tty_mutex currently so we can be relaxed about ordering.
*/
-int tty_init_termios(struct tty_struct *tty)
+void tty_init_termios(struct tty_struct *tty)
{
struct ktermios *tp;
int idx = tty->index;
@@ -1400,16 +1400,12 @@ int tty_init_termios(struct tty_struct *tty)
/* Compatibility until drivers always set this */
tty->termios.c_ispeed = tty_termios_input_baud_rate(&tty->termios);
tty->termios.c_ospeed = tty_termios_baud_rate(&tty->termios);
- return 0;
}
EXPORT_SYMBOL_GPL(tty_init_termios);
int tty_standard_install(struct tty_driver *driver, struct tty_struct *tty)
{
- int ret = tty_init_termios(tty);
- if (ret)
- return ret;
-
+ tty_init_termios(tty);
tty_driver_kref_get(driver);
tty->count++;
driver->ttys[tty->index] = tty;
@@ -1572,7 +1568,7 @@ err_release_tty:
return ERR_PTR(retval);
}
-void tty_free_termios(struct tty_struct *tty)
+static void tty_free_termios(struct tty_struct *tty)
{
struct ktermios *tp;
int idx = tty->index;
@@ -1591,7 +1587,6 @@ void tty_free_termios(struct tty_struct *tty)
}
*tp = tty->termios;
}
-EXPORT_SYMBOL(tty_free_termios);
/**
* tty_flush_works - flush all works of a tty/pty pair
diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c
index 3806e70..a66b01b 100644
--- a/drivers/usb/serial/console.c
+++ b/drivers/usb/serial/console.c
@@ -147,10 +147,7 @@ static int usb_console_setup(struct console *co, char *options)
kref_get(&tty->driver->kref);
__module_get(tty->driver->owner);
tty->ops = &usb_console_fake_tty_ops;
- if (tty_init_termios(tty)) {
- retval = -ENOMEM;
- goto put_tty;
- }
+ tty_init_termios(tty);
tty_port_tty_set(&port->port, tty);
}
@@ -185,7 +182,6 @@ static int usb_console_setup(struct console *co, char *options)
fail:
tty_port_tty_set(&port->port, NULL);
- put_tty:
tty_kref_put(tty);
reset_open_count:
port->port.count = 0;
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 9ce3dbc..1b58ead 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -448,7 +448,6 @@ extern int tty_unthrottle_safe(struct tty_struct *tty);
extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws);
extern void tty_driver_remove_tty(struct tty_driver *driver,
struct tty_struct *tty);
-extern void tty_free_termios(struct tty_struct *tty);
extern int is_current_pgrp_orphaned(void);
extern int is_ignored(int sig);
extern int tty_signal(int sig, struct tty_struct *tty);
@@ -509,10 +508,9 @@ extern struct tty_struct *alloc_tty_struct(struct tty_driver *driver, int idx);
extern int tty_alloc_file(struct file *file);
extern void tty_add_file(struct tty_struct *tty, struct file *file);
extern void tty_free_file(struct file *file);
-extern void free_tty_struct(struct tty_struct *tty);
extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx);
extern int tty_release(struct inode *inode, struct file *filp);
-extern int tty_init_termios(struct tty_struct *tty);
+extern void tty_init_termios(struct tty_struct *tty);
extern int tty_standard_install(struct tty_driver *driver,
struct tty_struct *tty);
--
2.7.0
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