[PATCH AUTOSEL 5.5 200/542] tty: serial: amba-pl011: remove set but unused variable

From: Sasha Levin
Date: Fri Feb 14 2020 - 13:12:16 EST


From: Xiongfeng Wang <wangxiongfeng2@xxxxxxxxxx>

[ Upstream commit 94345aee285334e9e12fc70572e3d9380791a64e ]

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@xxxxxxxxxx>
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@xxxxxxxxxx>
Link: https://lore.kernel.org/r/1575619526-34482-1-git-send-email-wangxiongfeng2@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/tty/serial/amba-pl011.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 4b28134d596a9..c5e9475feb47a 100644
--- 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)
--
2.20.1