linux-kernel - [PATCH] serial: sh-sci: Missing uart_unregister_driver() on error in sci_probe

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Date:   Fri, 8 Mar 2019 22:23:10 +0800
From:   Mao Wenan <maowenan@...wei.com>
To:     <gregkh@...uxfoundation.org>, <jslaby@...e.com>,
        <linux-serial@...r.kernel.org>, <kernel-janitors@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] serial: sh-sci: Missing uart_unregister_driver() on error in sci_probe_single()

Add the missing uart_unregister_driver() before return
from sci_probe_single() in the error handling case.

Signed-off-by: Mao Wenan <maowenan@...wei.com>
---
 drivers/tty/serial/sh-sci.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index 64bbeb7d7e0c..dde4eac9d222 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -3254,8 +3254,10 @@ static int sci_probe_single(struct platform_device *dev,
 	mutex_unlock(&sci_uart_registration_lock);
 
 	ret = sci_init_single(dev, sciport, index, p, false);
-	if (ret)
+	if (ret) {
+		uart_unregister_driver(&sci_uart_driver);
 		return ret;
+	}
 
 	sciport->gpios = mctrl_gpio_init(&sciport->port, 0);
 	if (IS_ERR(sciport->gpios) && PTR_ERR(sciport->gpios) != -ENOSYS)
-- 
2.20.1