diff options
| author | Jiri Slaby <jslaby@suse.cz> | 2021-05-05 12:19:16 +0300 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2021-05-19 11:56:40 +0300 |
| commit | 94cc7aeaf6c0cff0b8aeb7cb3579cee46b923560 (patch) | |
| tree | 480c01d00d7ff2fd9bd25f7becd79625a8bd771b /drivers/usb/serial/cypress_m8.c | |
| parent | d07f6ca923ea0927a1024dfccafc5b53b61cfecc (diff) | |
| download | linux-94cc7aeaf6c0cff0b8aeb7cb3579cee46b923560.tar.xz | |
USB: serial: make usb_serial_driver::write_room return uint
Line disciplines expect a positive value or zero returned from
tty->ops->write_room (invoked by tty_write_room). Both of them are being
updated to return an unsigned int. Switch also
usb_serial_driver::write_room and all its users.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
[ johan: amend commit message, drop unrelated comment change ]
Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers/usb/serial/cypress_m8.c')
| -rw-r--r-- | drivers/usb/serial/cypress_m8.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c index 166ee2286fda..5e7d2f9fa0c2 100644 --- a/drivers/usb/serial/cypress_m8.c +++ b/drivers/usb/serial/cypress_m8.c @@ -122,7 +122,7 @@ static void cypress_dtr_rts(struct usb_serial_port *port, int on); static int cypress_write(struct tty_struct *tty, struct usb_serial_port *port, const unsigned char *buf, int count); static void cypress_send(struct usb_serial_port *port); -static int cypress_write_room(struct tty_struct *tty); +static unsigned int cypress_write_room(struct tty_struct *tty); static void cypress_earthmate_init_termios(struct tty_struct *tty); static void cypress_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old); @@ -789,18 +789,18 @@ send: /* returns how much space is available in the soft buffer */ -static int cypress_write_room(struct tty_struct *tty) +static unsigned int cypress_write_room(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; struct cypress_private *priv = usb_get_serial_port_data(port); - int room = 0; + unsigned int room; unsigned long flags; spin_lock_irqsave(&priv->lock, flags); room = kfifo_avail(&priv->write_fifo); spin_unlock_irqrestore(&priv->lock, flags); - dev_dbg(&port->dev, "%s - returns %d\n", __func__, room); + dev_dbg(&port->dev, "%s - returns %u\n", __func__, room); return room; } |