USB: ftdi_sio: use generic chars_in_buffer
authorJohan Hovold <jhovold@gmail.com>
Mon, 29 Oct 2012 09:56:26 +0000 (10:56 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 30 Oct 2012 20:19:32 +0000 (13:19 -0700)
Use generic chars_in_buffer rather than copying it's implementation.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/serial/ftdi_sio.c

index 06b5d75dffc62e72f71aee0185715dc0c5f8f21d..9fe3a2e965adebbfba6074d21f2a253899f33aaf 100644 (file)
@@ -2093,16 +2093,11 @@ static int ftdi_chars_in_buffer(struct tty_struct *tty)
 {
        struct usb_serial_port *port = tty->driver_data;
        struct ftdi_private *priv = usb_get_serial_port_data(port);
-       unsigned long flags;
        int chars;
        unsigned char *buf;
        int ret;
 
-       /* Check software buffer (code from
-        * usb_serial_generic_chars_in_buffer()) */
-       spin_lock_irqsave(&port->lock, flags);
-       chars = kfifo_len(&port->write_fifo) + port->tx_bytes;
-       spin_unlock_irqrestore(&port->lock, flags);
+       chars = usb_serial_generic_chars_in_buffer(tty);
 
        /* Check hardware buffer */
        switch (priv->chip_type) {