AOSCOS: staging: sb105x: convert old ktermios to a const

Per commit a8c11c1 ("tty: Make ->set_termios() old ktermios const"),
the "old ktermios" would get discarded and there is therefore no point to
modify its value assignment.

Convert all relevant functions prototypes to adapt to this change.

Fixes: "AOSCOS: Revert "staging: sb105x: delete the driver""
Signed-off-by: Mingcong Bai <[email protected]>

Signed-off-by: Kexy Biscuit <[email protected]>

Author: MingcongBai

drivers/staging/sb105x/sb_pci_mp.c

@@ -33,7 +33,7 @@ static void mp_tasklet_action(unsigned long data);
 static inline void mp_update_mctrl(struct sb_uart_port *port, unsigned int set, unsigned int clear);
 static int mp_startup(struct sb_uart_state *state, int init_hw);
 static void mp_shutdown(struct sb_uart_state *state);
-static void mp_change_speed(struct sb_uart_state *state, struct MP_TERMIOS *old_termios);
+static void mp_change_speed(struct sb_uart_state *state, const struct MP_TERMIOS *old_termios);
 
 static inline int __mp_put_char(struct sb_uart_port *port, struct circ_buf *circ, unsigned char c);
 static int mp_put_char(struct tty_struct *tty, unsigned char ch);
@@ -57,7 +57,7 @@ static int mp_do_autoconfig(struct sb_uart_state *state);
 static int mp_wait_modem_status(struct sb_uart_state *state, unsigned long arg);
 static int mp_get_count(struct sb_uart_state *state, struct serial_icounter_struct *icnt);
 static int mp_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg);
-static void mp_set_termios(struct tty_struct *tty, struct MP_TERMIOS *old_termios);
+static void mp_set_termios(struct tty_struct *tty, const struct MP_TERMIOS *old_termios);
 static void mp_close(struct tty_struct *tty, struct file *filp);
 static void mp_wait_until_sent(struct tty_struct *tty, int timeout);
 static void mp_hangup(struct tty_struct *tty);
@@ -96,7 +96,7 @@ static void multi_break_ctl(struct sb_uart_port *port, int break_state);
 static int multi_startup(struct sb_uart_port *port);
 static void multi_shutdown(struct sb_uart_port *port);
 static unsigned int multi_get_divisor(struct sb_uart_port *port, unsigned int baud);
-static void multi_set_termios(struct sb_uart_port *port, struct MP_TERMIOS *termios, struct MP_TERMIOS *old);
+static void multi_set_termios(struct sb_uart_port *port, struct MP_TERMIOS *termios, const struct MP_TERMIOS *old);
 static void multi_pm(struct sb_uart_port *port, unsigned int state, unsigned int oldstate);
 static void multi_release_std_resource(struct mp_port *mtpt);
 static void multi_release_port(struct sb_uart_port *port);
@@ -586,7 +586,7 @@ static void mp_shutdown(struct sb_uart_state *state)
 	}
 }
 
-static void mp_change_speed(struct sb_uart_state *state, struct MP_TERMIOS *old_termios)
+static void mp_change_speed(struct sb_uart_state *state, const struct MP_TERMIOS *old_termios)
 {
 	struct tty_struct *tty = state->info->tty;
 	struct sb_uart_port *port = state->port;
@@ -1264,7 +1264,7 @@ static int mp_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg)
 	return ret;
 }
 
-static void mp_set_termios(struct tty_struct *tty, struct MP_TERMIOS *old_termios)
+static void mp_set_termios(struct tty_struct *tty, const struct MP_TERMIOS *old_termios)
 {
 	struct sb_uart_state *state = tty->driver_data;
 	unsigned long flags;
@@ -2510,7 +2510,7 @@ static unsigned int multi_get_divisor(struct sb_uart_port *port, unsigned int ba
 
 
 
-static void multi_set_termios(struct sb_uart_port *port, struct MP_TERMIOS *termios, struct MP_TERMIOS *old)
+static void multi_set_termios(struct sb_uart_port *port, struct MP_TERMIOS *termios, const struct MP_TERMIOS *old)
 {
 	struct mp_port *mtpt = (struct mp_port *)port;
 	unsigned char cval, fcr = 0;

drivers/staging/sb105x/sb_ser_core.h

@@ -77,7 +77,7 @@ struct sb_uart_ops {
 	int		(*startup)(struct sb_uart_port *);
 	void		(*shutdown)(struct sb_uart_port *);
 	void		(*set_termios)(struct sb_uart_port *, struct MP_TERMIOS *new,
-				       struct MP_TERMIOS *old);
+				       const struct MP_TERMIOS *old);
 	void		(*pm)(struct sb_uart_port *, unsigned int state,
 			      unsigned int oldstate);
 	int		(*set_wake)(struct sb_uart_port *, unsigned int state);
@@ -241,7 +241,7 @@ static void sb_uart_update_timeout(struct sb_uart_port *port, unsigned int cflag
     port->timeout = (HZ * bits) / baud + HZ/50;
 }
 static unsigned int sb_uart_get_baud_rate(struct sb_uart_port *port, struct MP_TERMIOS *termios,
-				struct MP_TERMIOS *old, unsigned int min,
+				const struct MP_TERMIOS *old, unsigned int min,
 				unsigned int max)
 {
         unsigned int try, baud, altbaud = 38400;