[PATCH 5.9 216/252] serial: ar933x_uart: disable clk on error handling path in probe

[Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>]

From: Zheng Zengkai <zhengzengkai@xxxxxxxxxx>

commit 425af483523b76bc78e14674a430579d38b2a593 upstream.

ar933x_uart_probe() does not invoke clk_disable_unprepare()
on one error handling path. This patch fixes that.

Fixes: 9be1064fe524 ("serial: ar933x_uart: add RS485 support")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Zheng Zengkai <zhengzengkai@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20201111124426.42638-1-zhengzengkai@xxxxxxxxxx
Cc: stable <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/tty/serial/ar933x_uart.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/tty/serial/ar933x_uart.c
+++ b/drivers/tty/serial/ar933x_uart.c
@@ -789,8 +789,10 @@ static int ar933x_uart_probe(struct plat
 		goto err_disable_clk;
 
 	up->gpios = mctrl_gpio_init(port, 0);
-	if (IS_ERR(up->gpios) && PTR_ERR(up->gpios) != -ENOSYS)
-		return PTR_ERR(up->gpios);
+	if (IS_ERR(up->gpios) && PTR_ERR(up->gpios) != -ENOSYS) {
+		ret = PTR_ERR(up->gpios);
+		goto err_disable_clk;
+	}
 
 	up->rts_gpiod = mctrl_gpio_to_gpiod(up->gpios, UART_GPIO_RTS);