pch_uart: remove set but not used variable 'tx_empty'

tx_empty is not used after setting its value. It is safe to remove
the unused variable.

Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Reviewed-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index cb85002..9ed121f 100644 (file)
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -933,7 +933,6 @@ static unsigned int dma_handle_tx(struct eg20t_port *priv)
        struct scatterlist *sg;
        int nent;
        int fifo_size;
-       int tx_empty;
        struct dma_async_tx_descriptor *desc;
        int num;
        int i;
@@ -958,11 +957,9 @@ static unsigned int dma_handle_tx(struct eg20t_port *priv)
        }
 
        fifo_size = max(priv->fifo_size, 1);
-       tx_empty = 1;
        if (pop_tx_x(priv, xmit->buf)) {
                pch_uart_hal_write(priv, xmit->buf, 1);
                port->icount.tx++;
-               tx_empty = 0;
                fifo_size--;
        }