[PATCH 8/8] tty: Make ->set_termios() old ktermios const

From: Ilpo Järvinen
Date: Tue Aug 16 2022 - 08:09:13 EST

Next message: Ilpo Järvinen: "[PATCH 7/8] usb: serial: Make ->set_termios() old ktermios const"
Previous message: Ilpo Järvinen: "[PATCH 6/8] serial: Make ->set_termios() old ktermios const"
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There should be no reason to adjust old ktermios which is going to get
discarded anyway.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
---
drivers/char/pcmcia/synclink_cs.c | 3 ++-
drivers/ipack/devices/ipoctal.c | 2 +-
drivers/mmc/core/sdio_uart.c | 4 ++--
drivers/net/usb/hso.c | 3 ++-
drivers/s390/char/tty3270.c | 2 +-
drivers/staging/fwserial/fwserial.c | 3 ++-
drivers/staging/greybus/uart.c | 2 +-
drivers/tty/amiserial.c | 6 +++---
drivers/tty/moxa.c | 9 +++++----
drivers/tty/mxser.c | 6 ++++--
drivers/tty/n_gsm.c | 3 ++-
drivers/tty/pty.c | 2 +-
drivers/tty/serial/serial_core.c | 6 +++---
drivers/tty/synclink_gt.c | 3 ++-
drivers/usb/class/cdc-acm.c | 4 ++--
drivers/usb/serial/usb-serial.c | 3 ++-
include/linux/tty_driver.h | 4 ++--
net/bluetooth/rfcomm/tty.c | 3 ++-
18 files changed, 39 insertions(+), 29 deletions(-)

diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c
index 8fc49b038372..b2735be81ab2 100644
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
@@ -2274,7 +2274,8 @@ static int mgslpc_ioctl(struct tty_struct *tty,
* tty pointer to tty structure
* termios pointer to buffer to hold returned old termios
*/
-static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
+static void mgslpc_set_termios(struct tty_struct *tty,
+ const struct ktermios *old_termios)
{
MGSLPC_INFO *info = (MGSLPC_INFO *)tty->driver_data;
unsigned long flags;
diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c
index 20d2b9ec1227..fc00274070b6 100644
--- a/drivers/ipack/devices/ipoctal.c
+++ b/drivers/ipack/devices/ipoctal.c
@@ -497,7 +497,7 @@ static unsigned int ipoctal_chars_in_buffer(struct tty_struct *tty)
}

static void ipoctal_set_termios(struct tty_struct *tty,
- struct ktermios *old_termios)
+ const struct ktermios *old_termios)
{
unsigned int cflag;
unsigned char mr1 = 0;
diff --git a/drivers/mmc/core/sdio_uart.c b/drivers/mmc/core/sdio_uart.c
index 414aa82abc39..ae7ef2e038be 100644
--- a/drivers/mmc/core/sdio_uart.c
+++ b/drivers/mmc/core/sdio_uart.c
@@ -246,7 +246,7 @@ static inline void sdio_uart_update_mctrl(struct sdio_uart_port *port,

static void sdio_uart_change_speed(struct sdio_uart_port *port,
struct ktermios *termios,
- struct ktermios *old)
+ const struct ktermios *old)
{
unsigned char cval, fcr = 0;
unsigned int baud, quot;
@@ -859,7 +859,7 @@ static void sdio_uart_unthrottle(struct tty_struct *tty)
}

static void sdio_uart_set_termios(struct tty_struct *tty,
- struct ktermios *old_termios)
+ const struct ktermios *old_termios)
{
struct sdio_uart_port *port = tty->driver_data;
unsigned int cflag = tty->termios.c_cflag;
diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index f8221a7acf62..ce1f6081d582 100644
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -1380,7 +1380,8 @@ static void hso_serial_cleanup(struct tty_struct *tty)
}

/* setup the term */
-static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
+static void hso_serial_set_termios(struct tty_struct *tty,
+ const struct ktermios *old)
{
struct hso_serial *serial = tty->driver_data;
unsigned long flags;
diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c
index 5c83f71c1d0e..26e3995ac062 100644
--- a/drivers/s390/char/tty3270.c
+++ b/drivers/s390/char/tty3270.c
@@ -1760,7 +1760,7 @@ tty3270_flush_chars(struct tty_struct *tty)
* Check for visible/invisible input switches
*/
static void
-tty3270_set_termios(struct tty_struct *tty, struct ktermios *old)
+tty3270_set_termios(struct tty_struct *tty, const struct ktermios *old)
{
struct tty3270 *tp;
int new;
diff --git a/drivers/staging/fwserial/fwserial.c b/drivers/staging/fwserial/fwserial.c
index e8fa7f53cd5e..81b06d88ed0d 100644
--- a/drivers/staging/fwserial/fwserial.c
+++ b/drivers/staging/fwserial/fwserial.c
@@ -1267,7 +1267,8 @@ static int fwtty_ioctl(struct tty_struct *tty, unsigned int cmd,
return err;
}

-static void fwtty_set_termios(struct tty_struct *tty, struct ktermios *old)
+static void fwtty_set_termios(struct tty_struct *tty,
+ const struct ktermios *old)
{
struct fwtty_port *port = tty->driver_data;
unsigned int baud;
diff --git a/drivers/staging/greybus/uart.c b/drivers/staging/greybus/uart.c
index dc4ed0ff1ae2..90ff07f2cbf7 100644
--- a/drivers/staging/greybus/uart.c
+++ b/drivers/staging/greybus/uart.c
@@ -480,7 +480,7 @@ static int gb_tty_break_ctl(struct tty_struct *tty, int state)
}

static void gb_tty_set_termios(struct tty_struct *tty,
- struct ktermios *termios_old)
+ const struct ktermios *termios_old)
{
struct gb_uart_set_line_coding_request newline;
struct gb_tty *gb_tty = tty->driver_data;
diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index 81e7f64c1739..f52266766df9 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -94,7 +94,7 @@ static struct tty_driver *serial_driver;
static unsigned char current_ctl_bits;

static void change_speed(struct tty_struct *tty, struct serial_state *info,
- struct ktermios *old);
+ const struct ktermios *old);
static void rs_wait_until_sent(struct tty_struct *tty, int timeout);

@@ -566,7 +566,7 @@ static void shutdown(struct tty_struct *tty, struct serial_state *info)
* the specified baud rate for a serial port.
*/
static void change_speed(struct tty_struct *tty, struct serial_state *info,
- struct ktermios *old_termios)
+ const struct ktermios *old_termios)
{
struct tty_port *port = &info->tport;
int quot = 0, baud_base, baud;
@@ -1169,7 +1169,7 @@ static int rs_ioctl(struct tty_struct *tty,
return 0;
}

-static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
+static void rs_set_termios(struct tty_struct *tty, const struct ktermios *old_termios)
{
struct serial_state *info = tty->driver_data;
unsigned long flags;
diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c
index f3c72ab1476c..35b6fddf0341 100644
--- a/drivers/tty/moxa.c
+++ b/drivers/tty/moxa.c
@@ -491,7 +491,7 @@ static int moxa_write(struct tty_struct *, const unsigned char *, int);
static unsigned int moxa_write_room(struct tty_struct *);
static void moxa_flush_buffer(struct tty_struct *);
static unsigned int moxa_chars_in_buffer(struct tty_struct *);
-static void moxa_set_termios(struct tty_struct *, struct ktermios *);
+static void moxa_set_termios(struct tty_struct *, const struct ktermios *);
static void moxa_stop(struct tty_struct *);
static void moxa_start(struct tty_struct *);
static void moxa_hangup(struct tty_struct *);
@@ -499,7 +499,7 @@ static int moxa_tiocmget(struct tty_struct *tty);
static int moxa_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear);
static void moxa_poll(struct timer_list *);
-static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
+static void moxa_set_tty_param(struct tty_struct *, const struct ktermios *);
static void moxa_shutdown(struct tty_port *);
static int moxa_carrier_raised(struct tty_port *);
static void moxa_dtr_rts(struct tty_port *, int);
@@ -1602,7 +1602,7 @@ static int moxa_tiocmset(struct tty_struct *tty,
}

static void moxa_set_termios(struct tty_struct *tty,
- struct ktermios *old_termios)
+ const struct ktermios *old_termios)
{
struct moxa_port *ch = tty->driver_data;

@@ -1761,7 +1761,8 @@ static void moxa_poll(struct timer_list *unused)

/******************************************************************************/

-static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
+static void moxa_set_tty_param(struct tty_struct *tty,
+ const struct ktermios *old_termios)
{
register struct ktermios *ts = &tty->termios;
struct moxa_port *ch = tty->driver_data;
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 70b982b2c6b2..3413bd77beed 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -571,7 +571,8 @@ static void mxser_handle_cts(struct tty_struct *tty, struct mxser_port *info,
* This routine is called to set the UART divisor registers to match
* the specified baud rate for a serial port.
*/
-static void mxser_change_speed(struct tty_struct *tty, struct ktermios *old_termios)
+static void mxser_change_speed(struct tty_struct *tty,
+ const struct ktermios *old_termios)
{
struct mxser_port *info = tty->driver_data;
unsigned cflag, cval;
@@ -1348,7 +1349,8 @@ static void mxser_start(struct tty_struct *tty)
spin_unlock_irqrestore(&info->slock, flags);
}

-static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
+static void mxser_set_termios(struct tty_struct *tty,
+ const struct ktermios *old_termios)
{
struct mxser_port *info = tty->driver_data;
unsigned long flags;
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index caa5c14ed57f..97cd8d67c866 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -3647,7 +3647,8 @@ static int gsmtty_ioctl(struct tty_struct *tty,
}
}

-static void gsmtty_set_termios(struct tty_struct *tty, struct ktermios *old)
+static void gsmtty_set_termios(struct tty_struct *tty,
+ const struct ktermios *old)
{
struct gsm_dlci *dlci = tty->driver_data;
if (dlci->state == DLCI_CLOSED)
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index 752dab3356d7..07394fdaf522 100644
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -240,7 +240,7 @@ static int pty_open(struct tty_struct *tty, struct file *filp)
}

static void pty_set_termios(struct tty_struct *tty,
- struct ktermios *old_termios)
+ const struct ktermios *old_termios)
{
/* See if packet mode change of state. */
if (tty->link && tty->link->ctrl.packet) {
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index c8295904b331..a8202b582bcc 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -49,7 +49,7 @@ static struct lock_class_key port_lock_key;
#define RS485_MAX_RTS_DELAY 100 /* msecs */

static void uart_change_speed(struct tty_struct *tty, struct uart_state *state,
- struct ktermios *old_termios);
+ const struct ktermios *old_termios);
static void uart_wait_until_sent(struct tty_struct *tty, int timeout);
static void uart_change_pm(struct uart_state *state,
enum uart_pm_state pm_state);
@@ -492,7 +492,7 @@ EXPORT_SYMBOL(uart_get_divisor);

/* Caller holds port mutex */
static void uart_change_speed(struct tty_struct *tty, struct uart_state *state,
- struct ktermios *old_termios)
+ const struct ktermios *old_termios)
{
struct uart_port *uport = uart_port_check(state);
struct ktermios *termios;
@@ -1619,7 +1619,7 @@ static void uart_set_ldisc(struct tty_struct *tty)
}

static void uart_set_termios(struct tty_struct *tty,
- struct ktermios *old_termios)
+ const struct ktermios *old_termios)
{
struct uart_state *state = tty->driver_data;
struct uart_port *uport;
diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c
index 9bc2a9265277..4a003e929776 100644
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -707,7 +707,8 @@ static void hangup(struct tty_struct *tty)
wake_up_interruptible(&info->port.open_wait);
}

-static void set_termios(struct tty_struct *tty, struct ktermios *old_termios)
+static void set_termios(struct tty_struct *tty,
+ const struct ktermios *old_termios)
{
struct slgt_info *info = tty->driver_data;
unsigned long flags;
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 483bcb1213f7..46dbf907e4b5 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -51,7 +51,7 @@ static DEFINE_IDR(acm_minors);
static DEFINE_MUTEX(acm_minors_lock);

static void acm_tty_set_termios(struct tty_struct *tty,
- struct ktermios *termios_old);
+ const struct ktermios *termios_old);

/*
* acm_minors accessors
@@ -1049,7 +1049,7 @@ static int acm_tty_ioctl(struct tty_struct *tty,
}

static void acm_tty_set_termios(struct tty_struct *tty,
- struct ktermios *termios_old)
+ const struct ktermios *termios_old)
{
struct acm *acm = tty->driver_data;
struct ktermios *termios = &tty->termios;
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index e35bea2235c1..164521ee10c6 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -519,7 +519,8 @@ static int serial_ioctl(struct tty_struct *tty,
return retval;
}

-static void serial_set_termios(struct tty_struct *tty, struct ktermios *old)
+static void serial_set_termios(struct tty_struct *tty,
+ const struct ktermios *old)
{
struct usb_serial_port *port = tty->driver_data;

diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index 4841d8069c07..b2456b545ba0 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -141,7 +141,7 @@ struct serial_struct;
*
* Optional.
*
- * @set_termios: ``void ()(struct tty_struct *tty, struct ktermios *old)``
+ * @set_termios: ``void ()(struct tty_struct *tty, const struct ktermios *old)``
*
* This routine allows the @tty driver to be notified when device's
* termios settings have changed. New settings are in @tty->termios.
@@ -365,7 +365,7 @@ struct tty_operations {
unsigned int cmd, unsigned long arg);
long (*compat_ioctl)(struct tty_struct *tty,
unsigned int cmd, unsigned long arg);
- void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
+ void (*set_termios)(struct tty_struct *tty, const struct ktermios *old);
void (*throttle)(struct tty_struct * tty);
void (*unthrottle)(struct tty_struct * tty);
void (*stop)(struct tty_struct *tty);
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
index ebd78fdbd6e8..b9536641161c 100644
--- a/net/bluetooth/rfcomm/tty.c
+++ b/net/bluetooth/rfcomm/tty.c
@@ -855,7 +855,8 @@ static int rfcomm_tty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned l
return -ENOIOCTLCMD;
}

-static void rfcomm_tty_set_termios(struct tty_struct *tty, struct ktermios *old)
+static void rfcomm_tty_set_termios(struct tty_struct *tty,
+ const struct ktermios *old)
{
struct ktermios *new = &tty->termios;
int old_baud_rate = tty_termios_baud_rate(old);
--
2.30.2

Next message: Ilpo Järvinen: "[PATCH 7/8] usb: serial: Make ->set_termios() old ktermios const"
Previous message: Ilpo Järvinen: "[PATCH 6/8] serial: Make ->set_termios() old ktermios const"
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