Commit 9a33fbf9 authored by Jiri Slaby's avatar Jiri Slaby Committed by Greg Kroah-Hartman
Browse files

tty: make tty_buffer_space_avail return uint 



tty_buffer_space_avail returns values >= 0, so make it clear by the
return type.

Signed-off-by: default avatarJiri Slaby <jslaby@suse.cz>
Cc: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20210505091928.22010-25-jslaby@suse.cz


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 03b3b1a2

drivers/tty/serial/8250/8250_aspeed_vuart.c

+2 −2
Original line number Diff line number Diff line
@@ -329,7 +329,7 @@ static int aspeed_vuart_handle_irq(struct uart_port *port) 
{

	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);
@@ -353,7 +353,7 @@ static int aspeed_vuart_handle_irq(struct uart_port *port) 
					  jiffies + unthrottle_timeout);



		} else {

			count = min(space, 256);

			count = min(space, 256U);



			do {

				serial8250_read_char(up, lsr);

drivers/tty/tty_buffer.c

+1 −1
Original line number Diff line number Diff line
@@ -88,7 +88,7 @@ EXPORT_SYMBOL_GPL(tty_buffer_unlock_exclusive); 
 *	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);

include/linux/tty_flip.h

+1 −1
Original line number Diff line number Diff line
@@ -3,7 +3,7 @@ 
#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);