USB: ftdi_sio: use generic chars_in_buffer
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>
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@ -2093,16 +2093,11 @@ static int ftdi_chars_in_buffer(struct tty_struct *tty)
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{
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{
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struct usb_serial_port *port = tty->driver_data;
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struct usb_serial_port *port = tty->driver_data;
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struct ftdi_private *priv = usb_get_serial_port_data(port);
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struct ftdi_private *priv = usb_get_serial_port_data(port);
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unsigned long flags;
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int chars;
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int chars;
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unsigned char *buf;
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unsigned char *buf;
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int ret;
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int ret;
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/* Check software buffer (code from
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chars = usb_serial_generic_chars_in_buffer(tty);
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* usb_serial_generic_chars_in_buffer()) */
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spin_lock_irqsave(&port->lock, flags);
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chars = kfifo_len(&port->write_fifo) + port->tx_bytes;
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spin_unlock_irqrestore(&port->lock, flags);
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/* Check hardware buffer */
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/* Check hardware buffer */
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switch (priv->chip_type) {
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switch (priv->chip_type) {
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