AOSCOS: staging: sb105x: revise type of mp_write() as ssize_t

Per commit 9571396 ("tty: make tty_operations::write()'s count
size_t"), member function `write()' in `struct tty_operations' was revised
from type `int' to type `ssize_t'.

Revise driver code accordingly.

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

@@ -39,7 +39,7 @@ static inline int __mp_put_char(struct sb_uart_port *port, struct circ_buf *circ
 static int mp_put_char(struct tty_struct *tty, unsigned char ch);
 
 static void mp_put_chars(struct tty_struct *tty);
-static int mp_write(struct tty_struct *tty, const unsigned char *buf, int count);
+static ssize_t mp_write(struct tty_struct *tty, const unsigned char *buf, long unsigned int count);
 static int mp_write_room(struct tty_struct *tty);
 static int mp_chars_in_buffer(struct tty_struct *tty);
 static void mp_flush_buffer(struct tty_struct *tty);
@@ -637,7 +637,7 @@ static void mp_put_chars(struct tty_struct *tty)
 	mp_start(tty);
 }
 
-static int mp_write(struct tty_struct *tty, const unsigned char *buf, int count)
+static ssize_t mp_write(struct tty_struct *tty, const unsigned char *buf, long unsigned int count)
 {
 	struct sb_uart_state *state = tty->driver_data;
 	struct sb_uart_port *port;