tty: serial: amba-pl011: remove set but unused variable

Fix the following warning:
drivers/tty/serial/amba-pl011.c: In function check_apply_cts_event_workaround:
drivers/tty/serial/amba-pl011.c:1461:15: warning: variable dummy_read set but not used [-Wunused-but-set-variable]

The data read is useless and can be dropped.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Link: https://lore.kernel.org/r/1575619526-34482-1-git-send-email-wangxiongfeng2@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 4b28134..c5e9475 100644 (file)
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -1452,8 +1452,6 @@ static void pl011_modem_status(struct uart_amba_port *uap)
 
 static void check_apply_cts_event_workaround(struct uart_amba_port *uap)
 {
-       unsigned int dummy_read;
-
        if (!uap->vendor->cts_event_workaround)
                return;
 
@@ -1465,8 +1463,8 @@ static void check_apply_cts_event_workaround(struct uart_amba_port *uap)
         * single apb access will incur 2 pclk(133.12Mhz) delay,
         * so add 2 dummy reads
         */
-       dummy_read = pl011_read(uap, REG_ICR);
-       dummy_read = pl011_read(uap, REG_ICR);
+       pl011_read(uap, REG_ICR);
+       pl011_read(uap, REG_ICR);
 }
 
 static irqreturn_t pl011_int(int irq, void *dev_id)