USB: ftdi_sio: remove unused tx_bytes counter

[platform/kernel/linux-starfive.git] / drivers / usb / serial / ftdi_sio.c

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 9668647..9594e35 100644 (file)
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -88,7 +88,6 @@ struct ftdi_private {
 
        unsigned int latency;           /* latency setting in use */
        spinlock_t tx_lock;     /* spinlock for transmit state */
-       unsigned long tx_bytes;
        unsigned long tx_outstanding_bytes;
        unsigned long tx_outstanding_urbs;
        unsigned short max_packet_size;
@@ -1729,10 +1728,6 @@ static int ftdi_open(struct tty_struct *tty, struct usb_serial_port *port)
 
        dbg("%s", __func__);
 
-       spin_lock_irqsave(&priv->tx_lock, flags);
-       priv->tx_bytes = 0;
-       spin_unlock_irqrestore(&priv->tx_lock, flags);
-
        write_latency_timer(port);
 
        /* No error checking for this (will get errors later anyway) */
@@ -1917,7 +1912,6 @@ static int ftdi_write(struct tty_struct *tty, struct usb_serial_port *port,
        } else {
                spin_lock_irqsave(&priv->tx_lock, flags);
                priv->tx_outstanding_bytes += count;
-               priv->tx_bytes += count;
                spin_unlock_irqrestore(&priv->tx_lock, flags);
        }