{
struct uart_8250_port *up = up_to_u8250p(port);
unsigned int iir, lsr;
- int space, count;
+ unsigned int space, count;
iir = serial_port_in(port, UART_IIR);
jiffies + unthrottle_timeout);
} else {
- count = min(space, 256);
+ count = min(space, 256U);
do {
serial8250_read_char(up, lsr);
* pre-allocate if memory guarantee is required).
*/
-int tty_buffer_space_avail(struct tty_port *port)
+unsigned int tty_buffer_space_avail(struct tty_port *port)
{
int space = port->buf.mem_limit - atomic_read(&port->buf.mem_used);
return max(space, 0);
#define _LINUX_TTY_FLIP_H
extern int tty_buffer_set_limit(struct tty_port *port, int limit);
-extern int tty_buffer_space_avail(struct tty_port *port);
+extern unsigned int tty_buffer_space_avail(struct tty_port *port);
extern int tty_buffer_request_room(struct tty_port *port, size_t size);
extern int tty_insert_flip_string_flags(struct tty_port *port,
const unsigned char *chars, const char *flags, size_t size);