From 94cc7aeaf6c0cff0b8aeb7cb3579cee46b923560 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Wed, 5 May 2021 11:19:16 +0200 Subject: 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 [ johan: amend commit message, drop unrelated comment change ] Signed-off-by: Johan Hovold --- drivers/usb/serial/usb_wwan.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/usb/serial/usb_wwan.c') diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c index 3eb72c59ede6..06212f08d9f9 100644 --- a/drivers/usb/serial/usb_wwan.c +++ b/drivers/usb/serial/usb_wwan.c @@ -278,12 +278,12 @@ static void usb_wwan_outdat_callback(struct urb *urb) } } -int usb_wwan_write_room(struct tty_struct *tty) +unsigned int usb_wwan_write_room(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; struct usb_wwan_port_private *portdata; int i; - int data_len = 0; + unsigned int data_len = 0; struct urb *this_urb; portdata = usb_get_serial_port_data(port); @@ -294,7 +294,7 @@ int usb_wwan_write_room(struct tty_struct *tty) data_len += OUT_BUFLEN; } - dev_dbg(&port->dev, "%s: %d\n", __func__, data_len); + dev_dbg(&port->dev, "%s: %u\n", __func__, data_len); return data_len; } EXPORT_SYMBOL(usb_wwan_write_room); -- cgit v1.2.3