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| author | Jiri Slaby <jslaby@suse.cz> | 2021-05-05 11:19:17 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-13 18:29:11 +0200 |
| commit | 9a33fbf9d23034d7e89849c587b0aed0e4cf794d (patch) | |
| tree | 01de10803e6c4224214136acba1c91a2004022c6 | |
| parent | 03b3b1a2405ccd71570cd5ec1fe4abd7bb4891cb (diff) | |
| download | linux-9a33fbf9d23034d7e89849c587b0aed0e4cf794d.tar.gz linux-9a33fbf9d23034d7e89849c587b0aed0e4cf794d.tar.bz2 linux-9a33fbf9d23034d7e89849c587b0aed0e4cf794d.zip | |
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: Jiri 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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/8250/8250_aspeed_vuart.c | 4 | ||||
| -rw-r--r-- | drivers/tty/tty_buffer.c | 2 | ||||
| -rw-r--r-- | include/linux/tty_flip.h | 2 |
3 files changed, 4 insertions, 4 deletions
diff --git a/drivers/tty/serial/8250/8250_aspeed_vuart.c b/drivers/tty/serial/8250/8250_aspeed_vuart.c index 2bf1d8582d9a..a28a394ba32a 100644 --- a/drivers/tty/serial/8250/8250_aspeed_vuart.c +++ b/drivers/tty/serial/8250/8250_aspeed_vuart.c @@ -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); diff --git a/drivers/tty/tty_buffer.c b/drivers/tty/tty_buffer.c index 55b1f1711341..585a19f65284 100644 --- a/drivers/tty/tty_buffer.c +++ b/drivers/tty/tty_buffer.c @@ -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); diff --git a/include/linux/tty_flip.h b/include/linux/tty_flip.h index 767f62086bd9..d6729281ec50 100644 --- a/include/linux/tty_flip.h +++ b/include/linux/tty_flip.h @@ -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); |