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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>
This commit is contained in:
Johan Hovold 2012-10-29 10:56:26 +01:00 committed by Greg Kroah-Hartman
parent 428d998855
commit 755b6040fa
1 changed files with 1 additions and 6 deletions
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7
drivers/usb/serial/ftdi_sio.c
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@ -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) {