[PATCH 7/8] usb: serial: Make ->set_termios() old ktermios const

From: Ilpo Järvinen
Date: Tue Aug 16 2022 - 08:09:14 EST

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/usb/serial/ark3116.c | 2 +-
drivers/usb/serial/belkin_sa.c | 6 ++++--
drivers/usb/serial/ch341.c | 5 +++--
drivers/usb/serial/cp210x.c | 13 ++++++++-----
drivers/usb/serial/cypress_m8.c | 6 ++++--
drivers/usb/serial/digi_acceleport.c | 6 ++++--
drivers/usb/serial/f81232.c | 3 ++-
drivers/usb/serial/f81534.c | 4 ++--
drivers/usb/serial/ftdi_sio.c | 6 ++++--
drivers/usb/serial/io_edgeport.c | 7 ++++---
drivers/usb/serial/io_ti.c | 8 +++++---
drivers/usb/serial/ir-usb.c | 6 ++++--
drivers/usb/serial/iuu_phoenix.c | 3 ++-
drivers/usb/serial/keyspan.c | 3 ++-
drivers/usb/serial/keyspan_pda.c | 3 ++-
drivers/usb/serial/kl5kusb105.c | 5 +++--
drivers/usb/serial/kobil_sct.c | 6 ++++--
drivers/usb/serial/mct_u232.c | 5 +++--
drivers/usb/serial/mos7720.c | 5 +++--
drivers/usb/serial/mos7840.c | 5 +++--
drivers/usb/serial/mxuport.c | 4 ++--
drivers/usb/serial/oti6858.c | 6 ++++--
drivers/usb/serial/pl2303.c | 3 ++-
drivers/usb/serial/quatech2.c | 4 ++--
drivers/usb/serial/spcp8x5.c | 3 ++-
drivers/usb/serial/ssu100.c | 4 ++--
drivers/usb/serial/ti_usb_3410_5052.c | 6 ++++--
drivers/usb/serial/upd78f0730.c | 4 ++--
drivers/usb/serial/whiteheat.c | 6 ++++--
drivers/usb/serial/xr_serial.c | 20 ++++++++++++--------
include/linux/usb/serial.h | 4 ++--
31 files changed, 105 insertions(+), 66 deletions(-)

diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c
index 39eaa7b97c40..9452291f1703 100644
--- a/drivers/usb/serial/ark3116.c
+++ b/drivers/usb/serial/ark3116.c
@@ -189,7 +189,7 @@ static void ark3116_port_remove(struct usb_serial_port *port)

static void ark3116_set_termios(struct tty_struct *tty,
struct usb_serial_port *port,
- struct ktermios *old_termios)
+ const struct ktermios *old_termios)
{
struct usb_serial *serial = port->serial;
struct ark3116_private *priv = usb_get_serial_port_data(port);
diff --git a/drivers/usb/serial/belkin_sa.c b/drivers/usb/serial/belkin_sa.c
index 8107e4b5b03b..9331a562dac0 100644
--- a/drivers/usb/serial/belkin_sa.c
+++ b/drivers/usb/serial/belkin_sa.c
@@ -44,7 +44,8 @@ static void belkin_sa_close(struct usb_serial_port *port);
static void belkin_sa_read_int_callback(struct urb *urb);
static void belkin_sa_process_read_urb(struct urb *urb);
static void belkin_sa_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios * old);
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios);
static void belkin_sa_break_ctl(struct tty_struct *tty, int break_state);
static int belkin_sa_tiocmget(struct tty_struct *tty);
static int belkin_sa_tiocmset(struct tty_struct *tty,
@@ -273,7 +274,8 @@ static void belkin_sa_process_read_urb(struct urb *urb)
}

static void belkin_sa_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct usb_serial *serial = port->serial;
struct belkin_sa_private *priv = usb_get_serial_port_data(port);
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c
index 2798fca71261..5731d69fcf18 100644
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -103,7 +103,7 @@ struct ch341_private {

static void ch341_set_termios(struct tty_struct *tty,
struct usb_serial_port *port,
- struct ktermios *old_termios);
+ const struct ktermios *old_termios);

static int ch341_control_out(struct usb_device *dev, u8 request,
u16 value, u16 index)
@@ -470,7 +470,8 @@ static int ch341_open(struct tty_struct *tty, struct usb_serial_port *port)
* tty->termios contains the new setting to be used.
*/
static void ch341_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct ch341_private *priv = usb_get_serial_port_data(port);
unsigned baud_rate;
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index c374620a486f..bb39d40974cf 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -31,9 +31,9 @@
static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
static void cp210x_close(struct usb_serial_port *);
static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *,
- struct ktermios *);
+ const struct ktermios *);
static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
- struct ktermios*);
+ const struct ktermios *);
static bool cp210x_tx_empty(struct usb_serial_port *port);
static int cp210x_tiocmget(struct tty_struct *);
static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
@@ -1039,7 +1039,8 @@ static speed_t cp210x_get_actual_rate(speed_t baud)
* otherwise.
*/
static void cp210x_change_speed(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct usb_serial *serial = port->serial;
struct cp210x_serial_private *priv = usb_get_serial_data(serial);
@@ -1121,7 +1122,8 @@ static bool cp210x_termios_change(const struct ktermios *a, const struct ktermio
}

static void cp210x_set_flow_control(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct cp210x_serial_private *priv = usb_get_serial_data(port->serial);
struct cp210x_port_private *port_priv = usb_get_serial_port_data(port);
@@ -1231,7 +1233,8 @@ static void cp210x_set_flow_control(struct tty_struct *tty,
}

static void cp210x_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct cp210x_serial_private *priv = usb_get_serial_data(port->serial);
u16 bits;
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index 5fbcc155e8f5..1e0c028c5ec9 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -125,7 +125,8 @@ static void cypress_send(struct usb_serial_port *port);
static unsigned int cypress_write_room(struct tty_struct *tty);
static void cypress_earthmate_init_termios(struct tty_struct *tty);
static void cypress_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old);
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios);
static int cypress_tiocmget(struct tty_struct *tty);
static int cypress_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear);
@@ -859,7 +860,8 @@ static void cypress_earthmate_init_termios(struct tty_struct *tty)
}

static void cypress_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct cypress_private *priv = usb_get_serial_port_data(port);
struct device *dev = &port->dev;
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c
index af65eb863d70..45d688e9b93f 100644
--- a/drivers/usb/serial/digi_acceleport.c
+++ b/drivers/usb/serial/digi_acceleport.c
@@ -215,7 +215,8 @@ static int digi_transmit_idle(struct usb_serial_port *port,
static void digi_rx_throttle(struct tty_struct *tty);
static void digi_rx_unthrottle(struct tty_struct *tty);
static void digi_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios);
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios);
static void digi_break_ctl(struct tty_struct *tty, int break_state);
static int digi_tiocmget(struct tty_struct *tty);
static int digi_tiocmset(struct tty_struct *tty, unsigned int set,
@@ -649,7 +650,8 @@ static void digi_rx_unthrottle(struct tty_struct *tty)


static void digi_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct digi_port *priv = usb_get_serial_port_data(port);
struct device *dev = &port->dev;
diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c
index d9f20256a6a8..2dd58cd9f0cc 100644
--- a/drivers/usb/serial/f81232.c
+++ b/drivers/usb/serial/f81232.c
@@ -603,7 +603,8 @@ static int f81232_port_disable(struct usb_serial_port *port)
}

static void f81232_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct f81232_private *priv = usb_get_serial_port_data(port);
u8 new_lcr = 0;
diff --git a/drivers/usb/serial/f81534.c b/drivers/usb/serial/f81534.c
index d789c1ec87b3..ddfcd72eb0ae 100644
--- a/drivers/usb/serial/f81534.c
+++ b/drivers/usb/serial/f81534.c
@@ -944,8 +944,8 @@ static int f81534_calc_num_ports(struct usb_serial *serial,
}

static void f81534_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port,
- struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
u8 new_lcr = 0;
int status;
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index d5a3986dfee7..3173316cb06b 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1087,7 +1087,8 @@ static void ftdi_process_read_urb(struct urb *urb);
static int ftdi_prepare_write_buffer(struct usb_serial_port *port,
void *dest, size_t size);
static void ftdi_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old);
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios);
static int ftdi_tiocmget(struct tty_struct *tty);
static int ftdi_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear);
@@ -2638,7 +2639,8 @@ static bool ftdi_tx_empty(struct usb_serial_port *port)
* WARNING: set_termios calls this with old_termios in kernel space
*/
static void ftdi_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct usb_device *dev = port->serial->dev;
struct device *ddev = &port->dev;
diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c
index ffa622539a25..3a4c0febf335 100644
--- a/drivers/usb/serial/io_edgeport.c
+++ b/drivers/usb/serial/io_edgeport.c
@@ -281,7 +281,7 @@ static int send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
static int calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
static void change_port_settings(struct tty_struct *tty,
struct edgeport_port *edge_port,
- struct ktermios *old_termios);
+ const struct ktermios *old_termios);
static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
__u8 regNum, __u8 regValue);
static int write_cmd_usb(struct edgeport_port *edge_port,
@@ -1441,7 +1441,8 @@ static void edge_unthrottle(struct tty_struct *tty)
* the termios structure
*****************************************************************************/
static void edge_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct edgeport_port *edge_port = usb_get_serial_port_data(port);

@@ -2325,7 +2326,7 @@ static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
*****************************************************************************/

static void change_port_settings(struct tty_struct *tty,
- struct edgeport_port *edge_port, struct ktermios *old_termios)
+ struct edgeport_port *edge_port, const struct ktermios *old_termios)
{
struct device *dev = &edge_port->port->dev;
struct edgeport_serial *edge_serial =
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index feba2a8d1233..bc3c24ea42c1 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -221,7 +221,8 @@ static void stop_read(struct edgeport_port *edge_port);
static int restart_read(struct edgeport_port *edge_port);

static void edge_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios);
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios);
static void edge_send(struct usb_serial_port *port, struct tty_struct *tty);

static int do_download_mode(struct edgeport_serial *serial,
@@ -2210,7 +2211,7 @@ static int restart_read(struct edgeport_port *edge_port)
}

static void change_port_settings(struct tty_struct *tty,
- struct edgeport_port *edge_port, struct ktermios *old_termios)
+ struct edgeport_port *edge_port, const struct ktermios *old_termios)
{
struct device *dev = &edge_port->port->dev;
struct ump_uart_config *config;
@@ -2351,7 +2352,8 @@ static void change_port_settings(struct tty_struct *tty,
}

static void edge_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct edgeport_port *edge_port = usb_get_serial_port_data(port);

diff --git a/drivers/usb/serial/ir-usb.c b/drivers/usb/serial/ir-usb.c
index 7b44dbea95cd..82f108134e6f 100644
--- a/drivers/usb/serial/ir-usb.c
+++ b/drivers/usb/serial/ir-usb.c
@@ -51,7 +51,8 @@ static unsigned int ir_write_room(struct tty_struct *tty);
static void ir_write_bulk_callback(struct urb *urb);
static void ir_process_read_urb(struct urb *urb);
static void ir_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios);
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios);

/* Not that this lot means you can only have one per system */
static u8 ir_baud;
@@ -376,7 +377,8 @@ static void ir_process_read_urb(struct urb *urb)
}

static void ir_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct usb_device *udev = port->serial->dev;
unsigned char *transfer_buffer;
diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c
index 0be3b5e1eaf3..77cba71bcccb 100644
--- a/drivers/usb/serial/iuu_phoenix.c
+++ b/drivers/usb/serial/iuu_phoenix.c
@@ -879,7 +879,8 @@ static int iuu_uart_baud(struct usb_serial_port *port, u32 baud_base,
}

static void iuu_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
const u32 supported_mask = CMSPAR|PARENB|PARODD;
struct iuu_private *priv = usb_get_serial_port_data(port);
diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c
index 1cfcd805f286..2966e0c4941e 100644
--- a/drivers/usb/serial/keyspan.c
+++ b/drivers/usb/serial/keyspan.c
@@ -616,7 +616,8 @@ static void keyspan_break_ctl(struct tty_struct *tty, int break_state)


static void keyspan_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
int baud_rate, device_port;
struct keyspan_port_private *p_priv;
diff --git a/drivers/usb/serial/keyspan_pda.c b/drivers/usb/serial/keyspan_pda.c
index 3e7628becdcd..6fd15cd9e1eb 100644
--- a/drivers/usb/serial/keyspan_pda.c
+++ b/drivers/usb/serial/keyspan_pda.c
@@ -321,7 +321,8 @@ static void keyspan_pda_break_ctl(struct tty_struct *tty, int break_state)
}

static void keyspan_pda_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct usb_serial *serial = port->serial;
speed_t speed;
diff --git a/drivers/usb/serial/kl5kusb105.c b/drivers/usb/serial/kl5kusb105.c
index edcc57bd9b5e..394b3189e003 100644
--- a/drivers/usb/serial/kl5kusb105.c
+++ b/drivers/usb/serial/kl5kusb105.c
@@ -56,7 +56,8 @@ static void klsi_105_port_remove(struct usb_serial_port *port);
static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port);
static void klsi_105_close(struct usb_serial_port *port);
static void klsi_105_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old);
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios);
static int klsi_105_tiocmget(struct tty_struct *tty);
static void klsi_105_process_read_urb(struct urb *urb);
static int klsi_105_prepare_write_buffer(struct usb_serial_port *port,
@@ -366,7 +367,7 @@ static void klsi_105_process_read_urb(struct urb *urb)

static void klsi_105_set_termios(struct tty_struct *tty,
struct usb_serial_port *port,
- struct ktermios *old_termios)
+ const struct ktermios *old_termios)
{
struct klsi_105_private *priv = usb_get_serial_port_data(port);
struct device *dev = &port->dev;
diff --git a/drivers/usb/serial/kobil_sct.c b/drivers/usb/serial/kobil_sct.c
index 4ed8b8b0a361..5e775f68fcb8 100644
--- a/drivers/usb/serial/kobil_sct.c
+++ b/drivers/usb/serial/kobil_sct.c
@@ -62,7 +62,8 @@ static int kobil_tiocmset(struct tty_struct *tty,
static void kobil_read_int_callback(struct urb *urb);
static void kobil_write_int_callback(struct urb *urb);
static void kobil_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old);
+ struct usb_serial_port *port,
+ const struct ktermios *old);
static void kobil_init_termios(struct tty_struct *tty);

static const struct usb_device_id id_table[] = {
@@ -474,7 +475,8 @@ static int kobil_tiocmset(struct tty_struct *tty,
}

static void kobil_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old)
+ struct usb_serial_port *port,
+ const struct ktermios *old)
{
struct kobil_private *priv;
int result;
diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
index ecd5b921e374..d3852feb81a4 100644
--- a/drivers/usb/serial/mct_u232.c
+++ b/drivers/usb/serial/mct_u232.c
@@ -45,7 +45,8 @@ static void mct_u232_close(struct usb_serial_port *port);
static void mct_u232_dtr_rts(struct usb_serial_port *port, int on);
static void mct_u232_read_int_callback(struct urb *urb);
static void mct_u232_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old);
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios);
static void mct_u232_break_ctl(struct tty_struct *tty, int break_state);
static int mct_u232_tiocmget(struct tty_struct *tty);
static int mct_u232_tiocmset(struct tty_struct *tty,
@@ -593,7 +594,7 @@ static void mct_u232_read_int_callback(struct urb *urb)

static void mct_u232_set_termios(struct tty_struct *tty,
struct usb_serial_port *port,
- struct ktermios *old_termios)
+ const struct ktermios *old_termios)
{
struct usb_serial *serial = port->serial;
struct mct_u232_private *priv = usb_get_serial_port_data(port);
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index 23ccbba716c7..1d1f85fabc28 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -1356,7 +1356,7 @@ static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port,
*/
static void change_port_settings(struct tty_struct *tty,
struct moschip_port *mos7720_port,
- struct ktermios *old_termios)
+ const struct ktermios *old_termios)
{
struct usb_serial_port *port;
struct usb_serial *serial;
@@ -1494,7 +1494,8 @@ static void change_port_settings(struct tty_struct *tty,
* termios structure.
*/
static void mos7720_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
int status;
struct moschip_port *mos7720_port;
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index 925067a7978d..6b12bb4648b8 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -1188,7 +1188,8 @@ static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
*****************************************************************************/

static void mos7840_change_port_settings(struct tty_struct *tty,
- struct moschip_port *mos7840_port, struct ktermios *old_termios)
+ struct moschip_port *mos7840_port,
+ const struct ktermios *old_termios)
{
struct usb_serial_port *port = mos7840_port->port;
int baud;
@@ -1330,7 +1331,7 @@ static void mos7840_change_port_settings(struct tty_struct *tty,

static void mos7840_set_termios(struct tty_struct *tty,
struct usb_serial_port *port,
- struct ktermios *old_termios)
+ const struct ktermios *old_termios)
{
struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
int status;
diff --git a/drivers/usb/serial/mxuport.c b/drivers/usb/serial/mxuport.c
index eb45a9b0005c..faa0eedfe245 100644
--- a/drivers/usb/serial/mxuport.c
+++ b/drivers/usb/serial/mxuport.c
@@ -760,7 +760,7 @@ static int mxuport_tiocmget(struct tty_struct *tty)
}

static int mxuport_set_termios_flow(struct tty_struct *tty,
- struct ktermios *old_termios,
+ const struct ktermios *old_termios,
struct usb_serial_port *port,
struct usb_serial *serial)
{
@@ -834,7 +834,7 @@ static int mxuport_set_termios_flow(struct tty_struct *tty,

static void mxuport_set_termios(struct tty_struct *tty,
struct usb_serial_port *port,
- struct ktermios *old_termios)
+ const struct ktermios *old_termios)
{
struct usb_serial *serial = port->serial;
u8 *buf;
diff --git a/drivers/usb/serial/oti6858.c b/drivers/usb/serial/oti6858.c
index a5caedbe72e2..6365cfe5402c 100644
--- a/drivers/usb/serial/oti6858.c
+++ b/drivers/usb/serial/oti6858.c
@@ -119,7 +119,8 @@ struct oti6858_control_pkt {
static int oti6858_open(struct tty_struct *tty, struct usb_serial_port *port);
static void oti6858_close(struct usb_serial_port *port);
static void oti6858_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old);
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios);
static void oti6858_init_termios(struct tty_struct *tty);
static void oti6858_read_int_callback(struct urb *urb);
static void oti6858_read_bulk_callback(struct urb *urb);
@@ -395,7 +396,8 @@ static void oti6858_init_termios(struct tty_struct *tty)
}

static void oti6858_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct oti6858_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 40b1ab3d284d..8949c1891164 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -789,7 +789,8 @@ static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_ty
}

static void pl2303_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct usb_serial *serial = port->serial;
struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
diff --git a/drivers/usb/serial/quatech2.c b/drivers/usb/serial/quatech2.c
index 36b1e064e51f..6fca40ace83a 100644
--- a/drivers/usb/serial/quatech2.c
+++ b/drivers/usb/serial/quatech2.c
@@ -261,8 +261,8 @@ static int qt2_calc_num_ports(struct usb_serial *serial,
}

static void qt2_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port,
- struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct usb_device *dev = port->serial->dev;
struct qt2_port_private *port_priv;
diff --git a/drivers/usb/serial/spcp8x5.c b/drivers/usb/serial/spcp8x5.c
index 7039dc918827..09a972a838ee 100644
--- a/drivers/usb/serial/spcp8x5.c
+++ b/drivers/usb/serial/spcp8x5.c
@@ -283,7 +283,8 @@ static void spcp8x5_init_termios(struct tty_struct *tty)
}

static void spcp8x5_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct usb_serial *serial = port->serial;
struct spcp8x5_private *priv = usb_get_serial_port_data(port);
diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c
index 181e302136a5..1e1888b66305 100644
--- a/drivers/usb/serial/ssu100.c
+++ b/drivers/usb/serial/ssu100.c
@@ -214,8 +214,8 @@ out: kfree(data);


static void ssu100_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port,
- struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct usb_device *dev = port->serial->dev;
struct ktermios *termios = &tty->termios;
diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c
index 18c0bd853392..b99f78224846 100644
--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -314,7 +314,8 @@ static bool ti_tx_empty(struct usb_serial_port *port);
static void ti_throttle(struct tty_struct *tty);
static void ti_unthrottle(struct tty_struct *tty);
static void ti_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios);
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios);
static int ti_tiocmget(struct tty_struct *tty);
static int ti_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear);
@@ -892,7 +893,8 @@ static void ti_unthrottle(struct tty_struct *tty)
}

static void ti_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct ti_port *tport = usb_get_serial_port_data(port);
struct ti_uart_config *config;
diff --git a/drivers/usb/serial/upd78f0730.c b/drivers/usb/serial/upd78f0730.c
index 63d4a784ae45..c47439bd90fa 100644
--- a/drivers/usb/serial/upd78f0730.c
+++ b/drivers/usb/serial/upd78f0730.c
@@ -296,8 +296,8 @@ static speed_t upd78f0730_get_baud_rate(struct tty_struct *tty)
}

static void upd78f0730_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port,
- struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct device *dev = &port->dev;
struct upd78f0730_line_control request;
diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c
index 332fb92ae575..7f82d40753ee 100644
--- a/drivers/usb/serial/whiteheat.c
+++ b/drivers/usb/serial/whiteheat.c
@@ -82,7 +82,8 @@ static void whiteheat_close(struct usb_serial_port *port);
static void whiteheat_get_serial(struct tty_struct *tty,
struct serial_struct *ss);
static void whiteheat_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old);
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios);
static int whiteheat_tiocmget(struct tty_struct *tty);
static int whiteheat_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear);
@@ -442,7 +443,8 @@ static void whiteheat_get_serial(struct tty_struct *tty, struct serial_struct *s


static void whiteheat_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
firm_setup_port(tty);
}
diff --git a/drivers/usb/serial/xr_serial.c b/drivers/usb/serial/xr_serial.c
index 6853cd56d8dc..f3811e060a44 100644
--- a/drivers/usb/serial/xr_serial.c
+++ b/drivers/usb/serial/xr_serial.c
@@ -104,7 +104,8 @@ static int xr21v141x_uart_enable(struct usb_serial_port *port);
static int xr21v141x_uart_disable(struct usb_serial_port *port);
static int xr21v141x_fifo_reset(struct usb_serial_port *port);
static void xr21v141x_set_line_settings(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios);
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios);

struct xr_type {
int reg_width;
@@ -133,8 +134,8 @@ struct xr_type {
int (*disable)(struct usb_serial_port *port);
int (*fifo_reset)(struct usb_serial_port *port);
void (*set_line_settings)(struct tty_struct *tty,
- struct usb_serial_port *port,
- struct ktermios *old_termios);
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios);
};

enum xr_type_id {
@@ -622,8 +623,8 @@ static int xr21v141x_set_baudrate(struct tty_struct *tty, struct usb_serial_port
}

static void xr_set_flow_mode(struct tty_struct *tty,
- struct usb_serial_port *port,
- struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct xr_data *data = usb_get_serial_port_data(port);
const struct xr_type *type = data->type;
@@ -674,7 +675,8 @@ static void xr_set_flow_mode(struct tty_struct *tty,
}

static void xr21v141x_set_line_settings(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct ktermios *termios = &tty->termios;
u8 bits = 0;
@@ -732,7 +734,8 @@ static void xr21v141x_set_line_settings(struct tty_struct *tty,
}

static void xr_cdc_set_line_coding(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct xr_data *data = usb_get_serial_port_data(port);
struct usb_host_interface *alt = port->serial->interface->cur_altsetting;
@@ -809,7 +812,8 @@ static void xr_cdc_set_line_coding(struct tty_struct *tty,
}

static void xr_set_termios(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old_termios)
+ struct usb_serial_port *port,
+ const struct ktermios *old_termios)
{
struct xr_data *data = usb_get_serial_port_data(port);

diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index 8ea319f89e1f..f7bfedb740f5 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -276,8 +276,8 @@ struct usb_serial_driver {
unsigned int cmd, unsigned long arg);
void (*get_serial)(struct tty_struct *tty, struct serial_struct *ss);
int (*set_serial)(struct tty_struct *tty, struct serial_struct *ss);
- void (*set_termios)(struct tty_struct *tty,
- struct usb_serial_port *port, struct ktermios *old);
+ void (*set_termios)(struct tty_struct *tty, struct usb_serial_port *port,
+ const struct ktermios *old);
void (*break_ctl)(struct tty_struct *tty, int break_state);
unsigned int (*chars_in_buffer)(struct tty_struct *tty);
void (*wait_until_sent)(struct tty_struct *tty, long timeout);
--
2.30.2