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

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Message-Id: <20201123121845.994774095@linuxfoundation.org>
Date:   Mon, 23 Nov 2020 13:22:46 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hulk Robot <hulkci@...wei.com>,
        Zheng Zengkai <zhengzengkai@...wei.com>
Subject: [PATCH 5.9 216/252] serial: ar933x_uart: disable clk on error handling path in probe

From: Zheng Zengkai <zhengzengkai@...wei.com>

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@...wei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@...wei.com>
Link: https://lore.kernel.org/r/20201111124426.42638-1-zhengzengkai@huawei.com
Cc: stable <stable@...r.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 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);