USB: ftdi_sio: remove unused rx_byte counter

Remove unused rx_byte counter which is never exposed as noted by Alan
Cox.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 0 insertions, 13 deletions

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 0ac2c2f540c9..bfb23d64bc6a 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -81,7 +81,6 @@ struct ftdi_private {
         struct delayed_work rx_work;
         struct usb_serial_port *port;
         int rx_processed;
-        unsigned long rx_bytes;
 
         __u16 interface;        /* FT2232C, FT2232H or FT4232H port interface
                                    (0 for FT232/245) */
@@ -1699,9 +1698,6 @@ static int ftdi_open(struct tty_struct *tty, struct usb_serial_port *port)
         spin_lock_irqsave(&priv->tx_lock, flags);
         priv->tx_bytes = 0;
         spin_unlock_irqrestore(&priv->tx_lock, flags);
-        spin_lock_irqsave(&priv->rx_lock, flags);
-        priv->rx_bytes = 0;
-        spin_unlock_irqrestore(&priv->rx_lock, flags);
 
         write_latency_timer(port);
 
@@ -2014,8 +2010,6 @@ static void ftdi_read_bulk_callback(struct urb *urb)
         struct usb_serial_port *port = urb->context;
         struct tty_struct *tty;
         struct ftdi_private *priv;
-        unsigned long countread;
-        unsigned long flags;
         int status = urb->status;
 
         if (urb->number_of_packets > 0) {
@@ -2054,13 +2048,6 @@ static void ftdi_read_bulk_callback(struct urb *urb)
                 goto out;
         }
 
-        /* count data bytes, but not status bytes */
-        countread = urb->actual_length;
-        countread -= 2 * DIV_ROUND_UP(countread, priv->max_packet_size);
-        spin_lock_irqsave(&priv->rx_lock, flags);
-        priv->rx_bytes += countread;
-        spin_unlock_irqrestore(&priv->rx_lock, flags);
-
         ftdi_process_read(&priv->rx_work.work);
 out:
         tty_kref_put(tty);